Items where Author is "Hirsch, Penny"

Number of items: 284.
  • Land management legacy affects abundance and function of the acdS gene in wheat root associated pseudomonads. (2021) Ruscoe, Heather, Taketani, Rodrigo, Clark, Ian, Lund, George, Hughes, David, Dodd, I., Hirsch, Penny, Mauchline, Tim
  • Theory of microbial coexistence in promoting soil–plant ecosystem health. (2021) Zhang, N., Nunan, N., Hirsch, Penny, Sun, B., Zhou, J., Liang, Y. picture_as_pdf
  • Metagenomic approaches reveal differences in genetic diversity and relative abundance of nitrifying bacteria and archaea in contrasting soils. (2021) Clark, Ian, Hughes, David, Fu, Qingling, Abadie, Maider, Hirsch, Penny
  • Microbiome Aggregated Traits and Assembly are More Sensitive to Soil Management than Diversity. (2021) Neal, Andy, Hughes, David, Clark, Ian, Jansson, J. K., Hirsch, Penny
  • Edaphic factors and plants influence denitrification in soils from a long-term arable experiment. (2020) Clark, Ian, Fu, Qingling, Abadie, Maider, Dixon, Liz, Blaud, Aimeric, Hirsch, Penny
  • Century long fertilization reduces stochasticity controlling grassland microbial community succession. (2020) Liang, Y., Ning, D., Lu, Z., Zhang, N., Hale, L., Wu, L., Clark, Ian, McGrath, Steve, Storkey, Jonathan, Hirsch, Penny, Sun, B., Zhou, J. picture_as_pdf
  • Development of a defined compost system for the study of plant-microbe interactions. (2020) Masters-Clark, Emily, Hirsch, Penny, Clark, Ian, Paradelo-Perez, Marcos, Mauchline, Tim
  • Bacterial and archaeal taxa are reliable indicators of soil restoration across distributed calcareous grasslands. (2020) Armbruster, M., Goodall, T., Hirsch, Penny, Ostle, N., Puissant, J., Fagan, K. C., Pywell, R. F., Griffiths, R. I.
  • Wheat dwarfing influences selection of the rhizosphere microbiome. (2020) Nessner-Kavamura-Noguchi, Vanessa, Robinson, R. J., Hughes, David, Clark, Ian, Rossmann, M., De Melo, I.S., Hirsch, Penny, Mendes, R., Mauchline, Tim
  • Effects of urease and nitrification inhibitors on soil N, nitrifier abundance and activity in a sandy loam soil. (2019) Fu, Qingling, Abadie, Maider, Blaud, Aimeric, Carswell, Alison, Misselbrook, Tom, Clark, Ian, Hirsch, Penny
  • Land management and microbial seed load effect on rhizosphere and endosphere bacterial community assembly in wheat. (2019) Nessner-Kavamura-Noguchi, Vanessa, Robinson, R. J., Hayat, R., Clark, Ian, Hughes, David, Rossmann, M., Hirsch, Penny, Mendes, R., Mauchline, Tim
  • Plant–microbe networks in soil are weakened by century‐long use of inorganic fertilizers. (2019) Huang, R., McGrath, Steve, Hirsch, Penny, Clark, Ian, Storkey, Jonathan, Wu, L., Zhou, J., Liang, Y.
  • The pH optimum of soil exoenzymes adapt to long term changes in soil pH. (2019) Puissant, J., Briony, J., Goodall, T., Mang, D., Blaud, Aimeric, Gweon, H. S., Malik, A., Jones, D. L., Clark, Ian, Hirsch, Penny, Griffiths, R. picture_as_pdf
  • Microorganisms Cycling Soil Nutrients. (2019) Hirsch, Penny picture_as_pdf
  • Soil microorganisms: role in soil health. (2018) Hirsch, Penny
  • Inorganic Nitrogen Application Affects Both Taxonomical and Predicted Functional Structure of Wheat Rhizosphere Bacterial Communities. (2018) Nessner-Kavamura-Noguchi, Vanessa, Hayat, R., Clark, Ian, Rossmann, M., Mendes, R., Hirsch, Penny, Mauchline, Tim
  • Old meets new: most probable number validation of metagenomic and metatranscriptomic datasets in soil. (2017) Mauchline, Tim, Hayat, R., Clark, Ian, Hirsch, Penny
  • The short-term effects of nitrification inhibitors on the abundance and expression of ammonia and nitrite oxidizers in a long-term field experiment comparing land management. (2017) Fu, Qingling, Clark, Ian, Zhu, J., Hu, H. Q., Hirsch, Penny picture_as_pdf
  • Is there sufficient Ensifer and Rhizobium species diversity in UK farmland soils to support red clover (Trifolium pratense), white clover (T. repens), lucerne (Medicago sativa) and black medic (M. lupulina)? (2017) Roberts, R., Jackson, R. W., Mauchline, Tim, Hirsch, Penny, Shaw, L. J., Doring, T. F., Jones, H. E.
  • Phylogenetic distribution, biogeography and the effects of land management upon bacterial non-specific Acid phosphatase Gene diversity and abundance. (2017) Neal, Andy, Blackwell, Martin, Akkari, Elsy, Clark, Ian, Hirsch, Penny, Guyomar, C.
  • Land-use influences phosphatase gene microdiversity in soils. (2017) Neal, Andy, Rossmann, M., Brearley, C., Akkari, Elsy, Guyomar, C., Clark, Ian, Allen, E., Hirsch, Penny
  • Soil resilience and recovery: rapid community responses to management changes. (2016) Hirsch, Penny, Jhurreea, D., Williams, J. K., Murray, Phil, Scott, Tony, Misselbrook, Tom, Goulding, Keith, Clark, Ian
  • Exploitation of endophytes for sustainable agricultural intensification Exploitation of endophytes. (2016) LeCocq, Kate, Gurr, S. J., Hirsch, Penny, Mauchline, Tim
  • Novel European free-living, non-diazotrophic Bradyrhizobium isolates from contrasting soils that lack nodulation and nitrogen fixation genes - a genome comparison. (2016) Jones, F. P., Clark, Ian, King, Robert, Shaw, L. J., Woodward, M. J., Hirsch, Penny
  • Wheat seed embryo excision enables the creation of axenic seedlings and Koch's postulates testing of putative bacterial endophytes. (2016) Robinson, R. J., Fraaije, Bart, Clark, Ian, Jackson, R. W., Hirsch, Penny, Mauchline, Tim
  • Endophytic bacterial community composition in wheat (Triticum aestivum) is determined by plant tissue type, developmental stage and soil nutrient availability. (2016) Robinson, R. J., Fraaije, Bart, Clark, Ian, Jackson, R. W., Hirsch, Penny, Mauchline, Tim picture_as_pdf
  • Long-Term Impact of Field Applications of Sewage Sludge on Soil Antibiotic Resistome. (2016) Xie, W-Y., McGrath, Steve, Su, J. Q., Hirsch, Penny, Clark, Ian, Shen, Q., Zhu, Y-G., Zhao, Fangjie picture_as_pdf
  • Misguided phylogenetic comparisons using DGGE excised bands may contaminate public sequence databases. (2016) Pylro, V. S., Morais, D. K., Kalks, K. H. M., Roesch, L. F. W., Hirsch, Penny, Totola, M. R., Yotoko, K. picture_as_pdf
  • Pseudomonas spp. diversity is negatively associated with suppression of the wheat take-all pathogen. (2016) Mehrabi, Z., Mcmillan, Vanessa, Clark, Ian, Canning, Gail, Hammond-Kosack, Kim, Preston, G., Hirsch, Penny, Mauchline, Tim
  • Responses of microbial community from tropical pristine coastal soil to crude oil contamination. (2016) Morais, D., Pylro, V., Clark, Ian, Hirsch, Penny, Totola, M. R.
  • The unique contribution of Rothamsted to ecological research at large temporal scales. (2016) Storkey, Jonathan, Macdonald, Andy, Bell, James, Clark, Ian, Gregory, Andy, Hawkins, Nichola, Hirsch, Penny, Todman, Lindsay, Whitmore, Andy picture_as_pdf
  • Over 150 years of long-term fertilization alters spatial scaling of microbial biodiversity. (2015) Liang, Y., Wu, Liyou, Clark, Ian, Xue, K., Yang, Y., Van Nostrand, J. D., Deng, Y., He, Z., McGrath, Steve, Storkey, Jonathan, Hirsch, Penny, Sun, B., Zhou, J.
  • Engineering soil organic matter quality: Biodiesel Co-Product (BCP) stimulates exudation of nitrogenous microbial biopolymers. (2015) Redmile-Gordon, Marc, Evershed, R. P., Kuhl, A., Armenise, E., White, R. P., Hirsch, Penny, Goulding, Keith, Brookes, Philip
  • Soil organic matter and the extracellular microbial matrix show contrasting responses to C and N availability. (2015) Redmile-Gordon, Marc, Evershed, R. P., Hirsch, Penny, White, R. P., Goulding, Keith
  • Soil pH determines microbial diversity and composition in the Park Grass Experiment. (2015) Zhalnina, K., Dias, R., De Quadros, P. D., Davis-Richardson, A., Camargo, F. A. O., Clark, Ian, McGrath, Steve, Hirsch, Penny, Triplett, E. W. picture_as_pdf
  • An analysis of Pseudomonas genomic diversity in take-all infected wheat fields reveals the lasting impact of wheat cultivars on the soil microbiota. (2015) Mauchline, Tim, Chedom-Fotso, D., Chandra, G., Samuels, T., Greenaway, N., Backhaus, A., Mcmillan, Vanessa, Canning, Gail, Powers, Stephen, Hammond-Kosack, Kim, Hirsch, Penny, Clark, Ian, Mehrabi, Z., Roworth, J., Burnell, J., Malone, J. G.
  • The importance of the microbial N cycle in soil for crop plant nutrition. (2015) Hirsch, Penny, Mauchline, Tim picture_as_pdf
  • Data analysis for 16S microbial profiling from different benchtop sequencing platforms. (2014) Pylro, V. S., Roesch, L. F. W., Morais, D. K., Clark, Ian, Hirsch, Penny, Totola, M. R.
  • Measuring the soil-microbial interface: extraction of extracellular polymeric substances (EPS) from soil biofilms. (2014) Redmile-Gordon, Marc, Brookes, Philip, Evershed, R. P., Goulding, Keith, Hirsch, Penny
  • Assessment of core and accessory genetic variation in Rhizobium leguminosarum symbiovar trifolii strains from diverse locations and host plants using PCR-based methods. (2014) Mauchline, Tim, Hayat, R., Roberts, R., Powers, Stephen, Hirsch, Penny
  • Biodiesel co-product (BCP) decreases soil nitrogen (N) losses to groundwater. (2014) Redmile-Gordon, Marc, Armenise, E., Hirsch, Penny, Brookes, Philip
  • Brazilian Microbiome Project: revealing the unexplored microbial diversity - challenges and prospects. (2014) Pylro, V. S., Roesch, L. F. W., Ortega, J. M., Do Amaral, A. M., Totola, M. R., Hirsch, Penny, Rosado, A. S., Goes-Neto, A., Da Costa Da Silva, A. L., Rosa, C. A., Morais, D. K., Andreote, F. D., Duarte, G. F., De Melo, I. S., Seldin, L., Lambais, M. R., Hungria, M., Peixoto, R. S., Kruger, R. H., Tsai, S. M., Azevedo, V. picture_as_pdf
  • Effects of the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) on abundance and activity of ammonia oxidizers in soil. (2014) Florio, A., Clark, I., Hirsch, Penny, Jhurreea, D., Benedetti, A.
  • A combined cryo-scanning electron microscopy/cryoplaning approach to study the infection of Meloidogyne incognita eggs by Pochonia chlamydosporia. (2014) Manzanilla-Lopez, R. H., Devonshire, J., Ward, E., Hirsch, Penny
  • The founding charter of the Genomic Observatories Network. (2014) Davies, N., Field, D., Amaral-Zettler, L., Clark, M. S., Deck, J., Drummond, A., Faith, D. P., Geller, J., Gilbert, J., Glockner, F. O., Hirsch, Penny, Leong, J-A., Meyer, C., Obst, M., Planes, S., Scholin, C., Vogler, A. P., Gates, R. D., Toonen, R., Berteaux-Lecellier, V., Barbier, M., Barker, K., Bertilsson, S., Bicak, M., Bietz, M. J., Bobe, J., Bodrossy, L., Borja, A., Coddington, J., Fuhrman, J., Gerdts, G., Gillespie, R., Goodwin, K., Hanson, P. C., Hero, J-M., Hoekman, D., Jansson, J., Jeanthon, C., Kao, R., Klindworth, A., Knight, R., Kottmann, R., Koo, M. S., Kotoulas, G., Lowe, Andrew J., Marteinsson, V. T., Meyer, F., Morrison, N., Myrold, D. D., Pafilis, E., Parker, S., Parnell, J. J., Polymenakou, P. N., Ratnasingham, S., Roderick, G. K., Rodriguez-Ezpeleta, N., Schonrogge, K., Simon, N., Valette-Silver, N. J., Springer, Y. P., Stone, G. N., Stones-Havas, S., Sansone, S-A., Thibault, K. M., Wecker, P., Wichels, A., Wooley, J. C., Yahara, T., Zingone, A.
  • The impact of tissue type, growth stage and fertilizers on the community structure of cultured bacterial wheat endophytes in the Broadbalk experiment. (2014) Robinson, R. R., Fraaije, Bart, Clark, Ian, Jackson, R. W., Hirsch, Penny, Mauchline, Tim
  • Ca. Nitrososphaera and Bradyrhizobium are inversely correlated and related to agricultural practices in long-term field experiments. (2013) Zhalnina, K., De Quadros, P. D., Gano, K. A., Davis-Richardson, A., Fagen, J. R., Brown, C. T., Giongo, A., Drew, J. C., Sayavedra-Soto, L. A., Arp, D. J., Camargo, F. A. O., Daroub, S. H., Clark, Ian, McGrath, Steve, Hirsch, Penny, Triplett, E. W.
  • Bacterial endophytes in wheat (Triticum aestivum): isolation, characterisation and bio-prospecting. (2013) Robinson, R., Mauchline, Tim, Hirsch, Penny, Jackson, R., Frost, H., Fraaije, Bart
  • Culture-independent molecular approaches to microbial ecology in soil and rhizosphere. (2013) Hirsch, Penny, Mauchline, Tim, Clark, Ian
  • Do root exudates exert more influence on rhizosphere bacterial community structure than other rhizodeposits? (2013) Hirsch, Penny, Miller, Tony, Dennis, P. G.
  • Pochonia chlamydosporia: advances and challenges to improve its performance as a biological control agent of sedentary endo-parasitic nematodes. (2013) Manzanilla-Lopez, R. H., Esteves, I., Finetti-Sialer, M. M., Hirsch, Penny, Ward, E., Devonshire, J., Hidalgo-Diaz, L.
  • Potential mineralization and nitrification in volcanic grassland soils in Chile. (2013) Cardenas, Laura, Hatch, D. J., Scholefield, D., Jhurreea, D., Clark, Ian, Hirsch, Penny, Salazar, F., Rao-Ravella, S., Alfaro, M. picture_as_pdf
  • A comparison of two colorimetric assays, based upon Lowry and Bradford techniques, to estimate total protein in soil extracts. (2013) Redmile-Gordon, Marc, Armenise, E., White, R. P., Hirsch, Penny, Goulding, Keith
  • Impacts of nitrogen application rates on the activity and diversity of denitrifying bacteria in the Broadbalk Wheat Experiment. (2012) Clark, Ian, Buchkina, N., Jhurreea, D., Goulding, Keith, Hirsch, Penny
  • Structure, fluctuation and magnitude of a natural grassland soil metagenome. (2012) Delmont, T. O., Prestat, E., Keegan, K. P., Faubladier, M., Robe, P., Clark, Ian, Pelletier, E., Hirsch, Penny, Meyer, F., Gilbert, J. A., Le Paslier, D., Simonet, P., Vogel, T. M.
  • Light microscopy and cryo SEM observations on Pochonia chlamydosporia parasitism in root-knot nematodes. (2012) Manzanilla-Lopez, R. H., Devonshire, J., Ward, E., Hirsch, Penny
  • Microbial ecological theory: current perspectives. (2012) UNSPECIFIED
  • Mutualism: plant-microorganism interactions. (2012) Mauchline, Tim
  • Pasteuria endospores from Heterodera cajani (Nematoda: Heteroderidae) exhibit inverted attachment and altered germination in cross-infection studies with Globodera pallida (Nematoda: Heteroderidae). (2012) Mohan, S., Mauchline, Tim, Rowe, J., Hirsch, Penny, Davies, K. G.
  • The Pochonia chlamydosporia serine protease gene vcp1 is subject to regulation by carbon, nitrogen and pH: implications for nematode biocontrol. (2012) Ward, E., Kerry, B. R., Manzanilla-Lopez, R. H., Mutua, G., Devonshire, J., Kimenju, J., Hirsch, Penny
  • Who's who in the plant root microbiome? (2012) Hirsch, Penny, Mauchline, Tim picture_as_pdf
  • A genomic network to monitor Earth. (2012) Davies, N., Field, D., Hirsch, Penny picture_as_pdf
  • Accessing the soil metagenome for studies of microbial diversity. (2011) Delmont, T. O., Robe, P., Cecillon, S., Clark, Ian, Constancias, F., Simonet, P., Hirsch, Penny, Vogel, T. M.
  • Development of a real-time PCR assay for detection and quantification of Rhizobium leguminosarum bacteria and discrimination between different biovars in zinc-contaminated soil. (2011) Macdonald, C. A., Clark, Ian, Hirsch, Penny, Zhao, Fangjie, McGrath, Steve picture_as_pdf
  • Ecology of Pochonia chlamydosporia in the rhizosphere at the population, whole organism and molecular scales. (2011) Kerry, B. R., Hirsch, Penny
  • Exploring competitiveness and genetic variation in the nematophagous fungus Pochonia chlamydosporia var. chlamydosporia and its significance for biological control. (2011) Manzanilla-Lopez, R. H., Clark, Ian, Atkins, S. D., Hirsch, Penny, Kerry, B. R.
  • Identification of new single nucleotide polymorphism-based markers for inter- and intraspecies discrimination of obligate bacterial parasites (Pasteuria spp.) of invertebrates. (2011) Mauchline, Tim, Knox, R., Mohan, S., Powers, Stephen, Kerry, B. R., Davies, K. G., Hirsch, Penny
  • Impacts of land use change on denitrifying bacteria and nitrous oxide emissions. (2011) Hirsch, Penny, Jhurreea, D., Scott, Tony, Misselbrook, Tom, Goulding, Keith, Clark, Ian
  • Long-term impacts of zinc and copper enriched sewage sludge additions on bacterial, archaeal and fungal communities in arable and grassland soils. (2011) Macdonald, C. A., Clark, Ian, Zhao, Fangjie, Hirsch, Penny, Singh, B. K., McGrath, Steve picture_as_pdf
  • Multi-scale approaches to investigating C dynamics in grassland systems. (2011) Dungait, Jennifer, Bol, Roland, Murray, Phil, Dixon, Liz, Granger, Steve, Crotty, F. V., Hirsch, Penny, Evershed, R., Goulding, Keith
  • Nutrient regulation of parasitism genes in the nematophagous fungus Pochonia chlamydosporia. (2011) Ward, E., Kerry, B. R., Manzanilla-Lopez, R. H., Hirsch, Penny
  • Pochonia chlamydosporia: advances and challenges to improve its performance as a biological control agent of sedentary endo-parasitic nematodes. (2011) Manzanilla-Lopez, R. H., Esteves, I., Finetti-Sialer, M., Hirsch, Penny, Ward, E., Devonshire, J., Hidalgo, L., Kerry, B. R.
  • Soil management in relation to sustainable agriculture and ecosystem services. (2011) Powlson, David, Gregory, P. J., Whalley, Richard, Quinton, J. N., Hopkins, D. W., Whitmore, Andy, Hirsch, Penny, Goulding, Keith picture_as_pdf
  • Soil metagenomics reveals impacts of land management on microbial communities in long-term field experiments. (2011) Hirsch, Penny
  • Transcriptome analysis shows differential gene expression in the saprotrophic to parasitic transition of Pochonia chlamydosporia. (2011) Rosso, L. C., Finetti-Sialer, M. M., Hirsch, Penny, Ciancio, A., Kerry, B. R., Clark, Ian picture_as_pdf
  • The role of soil bacteria in nitrogen cycling. (2011) Hirsch, Penny
  • Culture-independent molecular techniques for soil microbial ecology. (2010) Hirsch, Penny, Mauchline, Tim, Clark, Ian picture_as_pdf
  • Are root exudates more important than other sources of rhizodeposits in structuring rhizosphere bacterial communities? (2010) Dennis, P. G., Miller, Tony, Hirsch, Penny picture_as_pdf
  • Effects of long-term fertilization and liming on microbial functions and diversity in the grassland site at Rothamsted Research, UK. (2010) Wu, Liyou, Liang, Y., Clark, Ian, Wue, K., Deng, Y., He, Z., Van Nostrand, J., Macdonald, C., Hirsch, Penny, McGrath, Steve, Zhou, J.
  • Effects of long-term fertilization on spatial distribution patterns of microbial functional genes from the Rothamsted Experimental site. (2010) Liang, Y., Wu, Liyou, Clark, Ian, Xue, K., Deng, Y., He, Z., Hirsch, Penny, McGrath, Steve, Zhou, J.
  • Exploring microbial diversity - methods and meaning. (2010) Ogilvie, L. A., Hirsch, Penny
  • Long-term agricultural experiments reveal N influence on ammonia oxidizers and the predominance of CA. nitrososphaera. (2010) Giongo, A., Gano, K., Roesch, L., Casella, G., Daroub, S., Ramiez, K., Sayavedra-Soto, L., Arp, D., Clark, Ian, Hirsch, Penny, McGrath, Steve, Triplett, E.
  • Nutrient regulation of parasitism in Pochonia chlamydosporia. (2010) Ward, E., Mutua, G., Manzanilla-Lopez, R. H., Kerry, B. R., Kimenju, J., Hirsch, Penny
  • Pochonia chlamydosporia: some biological and physiological aspects in the host-parasite relationship. (2010) Manzanilla-Lopez, R. H., Kerry, B. R., Esteves, I., Ward, E., Hirsch, Penny
  • Relative impact of soil, metal source and metal concentration on bacterial community structure and community tolerance. (2010) Macdonald, C. A., Yang, X., Clark, Ian, Zhao, Fangjie, Hirsch, Penny, McGrath, Steve picture_as_pdf
  • Role of antecedent soil moisture on microbial populations involved in gaseous N2O emissions - use of isotopomers to understand sources. (2010) Cardenas, Laura, Bol, Roland, Bergstermann, A., Meijide, A., Hirsch, Penny, Jhurreea, D., Clark, Ian, Gilliam, L., Goulding, Keith, Well, R., Scholefield, D.
  • Soil metagenomics: can we access the diversity? (2010) Delmont, T., Cecillon, S., Clark, Ian, Simonet, P., Hirsch, Penny, Vogel, T.
  • Soil without plants: the consequences for microorganisms and mesofauna. (2010) Goulding, Keith, Murray, Phil, Sohi, S. P., Gilliam, L. M., Williams, J. K., Clark, Ian, Hirsch, Penny
  • Targeting the active bacterial communities in soil pores. (2010) Mccabe, D., Clark, Ian, Sohi, S., Shaw, E., Hirsch, Penny
  • A method for release and multiple strand amplification of small quantities of DNA from endospores of the fastidious bacterium Pasteuria penetrans. (2010) Mauchline, Tim, Mohan, S., Davies, K. G., Schaff, J. E., Opperman, C. H., Kerry, B. R., Hirsch, Penny picture_as_pdf
  • Advantages of the metagenomic approach for soil exploration: reply from Vogel et al. (2009) Vogel, T. M., Hirsch, Penny, Simonet, P., Jansson, J. K., Tiedje, J. M., Van Elsas, J. D., Nalin, R., Philippot, L., Bailey, M. J. picture_as_pdf
  • TerraGenome: a consortium for the sequencing of a soil metagenome. (2009) Vogel, T. M., Simonet, P., Jansson, J. K., Hirsch, Penny, Tiedje, J. M., Van Elsas, J. D., Bailey, M. J., Nalin, R., Philippot, L. picture_as_pdf
  • Are long-term changes in soil organic matter reflected in the soil communities? (2009) Murray, Phil, Hirsch, Penny, Gilliam, L. M., Sohi, S. P., Williams, J. K., Clark, Ian, Brookes, Philip
  • Are long-term changes in soil organic matter reflected in the soil communities? (2009) Brookes, Philip, Hirsch, Penny, Gilliam, L. M., Clark, Ian, Sohi, S. P., Williams, J. K., Murray, Phil
  • Are long-term changes in soil organic matter reflected in the soil communities? (2009) Murray, Phil, Hirsch, Penny, Gilliam, L. M., Sohi, S. P., Williams, J. K., Clark, Ian, Brookes, Philip
  • Caracterizacion del hongo nematofago cepa IMI SD 187 de Pochonia chlamydosporia var. catenulata (Kamyscho ex Barron y Onions) Zare y Gams. (2009) Peteira, B., Hidalgo, L., Esteves, I., Montes De Oca, N., Atkins, S. D., Hirsch, Penny, Kerry, B. R.
  • Exploring competitiveness and genetic variation in the nematophagous fungus Pochonia chlamydosporia var. chlamydosporia and its significance for biological control. (2009) Manzanilla-Lopez, R. H., Clark, Ian, Atkins, S., Hirsch, Penny, Kerry, B. R.
  • Linking rhizoplane pH and bacterial density at the microhabitat scale. (2009) Dennis, P. G., Hirsch, Penny, Smith, S. J., Taylor, R. G., Valsami-Jones, E., Miller, Tony picture_as_pdf
  • Measuring abundance, diversity and parasitic ability in two populations of the nematophagous fungus Pochonia chlamydosporia var. chlamydosporia. (2009) Manzanilla-Lopez, R. H., Atkins, S. D., Clark, Ian, Kerry, B. R., Hirsch, Penny
  • Microbial diversity maintained in soils starved of plant inputs for 50 years. (2009) Clark, Ian, Gilliam, L. M., Sohi, S. P., Williams, J., Murray, Phil, Hirsch, Penny
  • Microhabitat scale methods in microbial ecology. (2009) Dennis, P., Miller, Tony, Kilburn, M., Taylor, R., Valsami-Jones, E., Grovenor, C., Hirsch, Penny
  • Rapid and reliable DNA extraction and PCR fingerprinting methods to discriminate multiple biotypes of the nematophagous fungus Pochonia chlamydosporia isolated from plant rhizospheres. (2009) Manzanilla-Lopez, R. H., Clark, Ian, Atkins, S. D., Hirsch, Penny, Kerry, B. R.
  • Sampling bacteria at the microhabitat scale. (2009) Hirsch, Penny, Dennis, P. G., Miller, Tony
  • Sequencing the microbial metagenome of an iconic grassland soil, the Rothamsted Park Grass Experiment. (2009) Hirsch, Penny, Clark, Ian
  • Starving the soil of plant inputs for 50 years reduces abundance but not diversity of soil bacterial communities. (2009) Hirsch, Penny, Gilliam, L. M., Sohi, S. P., Williams, J. K., Clark, Ian, Murray, Phil picture_as_pdf
  • Through the keyhole: a key to open the bacterial lock; aka using BrdU to target pore space diversity. (2009) Mccabe, D., Clark, Ian, Sohi, S. P., Shaw, L., Hirsch, Penny
  • Use of real-time quantitative PCR to investigate root and gall colonisation by co-inoculated isolates of the nematophagous fungus Pochonia chlamydosporia. (2009) Atkins, S. D., Peteira, B., Clark, Ian, Kerry, B. R., Hirsch, Penny
  • What can we learn from the Rothamsted Classical Experiments using molecular techniques. (2009) Hirsch, Penny
  • What plants do for soil and what happens after they've gone. (2009) Hirsch, Penny, Clark, Ian
  • The impact of nutrition on parasitism of nematode eggs by Pochonia chlamydosporia. (2009) Mutua, G., Kerry, B. R., Hirsch, Penny, Kimenju, J., Manzanilla-Lopez, R. H., Ward, E.
  • A rapid method for release and multiple strand amplification of small quantities of DNA from Pasteuria penetrans endospores. (2009) Mauchline, Tim, Mohan, S., Davies, K. G., Kerry, B. R., Hirsch, Penny
  • Development of a transformation system for the nematophagous fungus Pochonia chlamydosporia. (2008) Atkins, S. D., Mauchline, Tim, Kerry, B. R., Hirsch, Penny picture_as_pdf
  • The biocontrol fungus Pochonia chlamydosporia shows nematode host preference at the infraspecific level. (2008) Mauchline, Tim, Kerry, B. R., Hirsch, Penny picture_as_pdf
  • Bacterial diversity of the Broadbalk 'Classical' winter wheat experiment in relation to long-term fertilizer inputs. (2008) Ogilvie, L. A., Hirsch, Penny, Johnston, A. W. B. picture_as_pdf
  • Ecology of Pochonia chlamydosporia in the rhizosphere. (2008) Kerry, B. R., Hirsch, Penny
  • Gene expression profiles in Pochonia chlamydosporia in conditions of saprotrophic-to-parasite transition. (2008) Finetti-Sialer, M., Hirsch, Penny, Kerry, B. R., Clark, Ian
  • Interactions on roots and the efficacy of Pochonia chlamydosporia as a biological control agent. (2008) Kerry, B. R., Clark, Ian, Esteves, I., Finetti, M., Hirsch, Penny, Gomez-Gil, L., Manzanilla-Lopez, R. H., Rosso, L. C.
  • Long-term impacts of metal-rich sludge additions on soil microbial communities - effects of metal source and soil type. (2008) Macdonald, C., Yang, X., Clark, Ian, Hirsch, Penny, McGrath, Steve
  • New approaches to an old problem: linking soil quality and microbial communities. (2008) Hirsch, Penny
  • Rhizobial symbioses - past, present and future. (2008) Hirsch, Penny
  • Survival of bacterial DNA and culturable bacteria in archived soils from the Rothamsted Broadbalk experiment. (2008) Clark, Ian, Hirsch, Penny
  • A novel method for sampling bacteria on plant root and soil surfaces at the microhabitat scale. (2008) Dennis, P. G., Miller, Tony, Clark, Ian, Taylor, R. G., Valsami-Jones, E., Hirsch, Penny picture_as_pdf
  • Distribution of environmental mycobacteria in Karonga District, Northern Malawi. (2006) Chilima, B. Z., Clark, Ian, Floyd, S., Fine, P. E. M., Hirsch, Penny
  • Assessing genetic diversity of Pochonia chlamydosporia populations using ERIC primers. (2006) Manzanilla-Lopez, R. H., Clark, Ian, Hirsch, Penny, Kerry, B. R.
  • Biological and chemical characterisation of microsites in the rhizosphere. (2006) Dennis, P. G., Miller, Tony, Hirsch, Penny
  • DNA fingerprinting methodology to monitor infectivity, competition and rhizosphere competence of Pochonia chlamydosporia isolates within bulk soil, rhizoshere and Meloidogyne incognita egg masses. (2006) Manzanilla-Lopez, R. H., Clark, Ian, Atkins, S., Hirsch, Penny, Kerry, B. R.
  • Life in earth: the impact of GM plants on soil ecology? (2006) Lilley, A. K., Bailey, M. J., Cartwright, C., Turner, S. L., Hirsch, Penny
  • Monitoring active bacterial communities in soil. (2006) Clark, Ian, Cookson, W. R., Hampshire, D., Hirsch, Penny
  • Non-destructive micro-scale sampling of bacteria from a root surface using a tungsten rod with a standardised sampling area controlled by a micromanipulator. (2006) Dennis, P. G., Miller, Tony, Hirsch, Penny
  • Novel method to investigate spatiotemporal trends in rhizosphere bacterial communities. (2006) Dennis, P. G., Miller, Tony, Hirsch, Penny
  • The influence of season, agricultural management and soil properties on gross nitrogen transformations and bacterial community structure. (2006) Cookson, W. R., Marschner, P., Clark, Ian, Milton, N., Smirk, M. N., Murphy, D. V., Osman, M., Stockdale, E. A., Hirsch, Penny
  • Changes in the microbial community of an arable soil caused by long-term metal contamination. (2005) Abaye, D. A., Lawlor, K., Hirsch, Penny, Brookes, Philip
  • Impact of the nematophagous fungus Pochonia chlamydosporia on nematode and microbial populations. (2005) Tahseen, Q., Clark, Ian, Atkins, S. D., Hirsch, Penny, Kerry, B. R.
  • Novel method to investigate spatiotemporal trends in bacterial communities in the rhizosphere. (2005) Dennis, P. G., Miller, Tony, Hirsch, Penny
  • Real-time PCR to monitor and assess the efficacy of two types of inoculum of the nematophagous fungus Pochonia chlamydosporia var. catenulata against root-knot nematode populations in the field. (2005) Peteira, B., Puertas, A., Hidalgo-Diaz, L., Hirsch, Penny, Kerry, B. R., Atkins, S. D.
  • The use of real-time PCR and species-specific primers for the identification and monitoring of Paecilomyces lilacinus. (2005) Atkins, S. D., Clark, Ian, Pande, S., Hirsch, Penny, Kerry, B. R.
  • A physical map of pPH1JI and pJB4JI. (2004) Hirsch, Penny, Beringer, J. E.
  • Biological variation in Verticillium chlamydosporium isolated from different nematode hosts. (2004) Morton, C. O., Hirsch, Penny, Peberdy, J., Kerry, B. R.
  • Detection of microbial DNA sequences by colony hybridization. (2004) Hirsch, Penny
  • Dissecting the tri-trophic interaction between Pochonia chlamydosporia , root-knot nematodes and their plant hosts. (2004) Morton, C. O., Atkins, S. D., Hirsch, Penny, Kerry, B. R.
  • Impact of genetically modified bacterial inoculants on the soil microbial community. (2004) Hirsch, Penny, Clark, Ian
  • Infection of plant-parasitic nematodes by nematophagous fungi - a review of the application of molecular biology to understand infection processes and to improve biological control. (2004) Morton, C. O., Hirsch, Penny, Kerry, B. R.
  • Investigation of three nematophagous fungi in two potato cyst nematode suppressive soils. (2004) Atkins, S. D., Sosnowska, D., Evans, V. J., Clark, Ian, Hirsch, Penny, Kerry, B. R.
  • Novel method to investigate microbial community structure in microsites in the rhizosphere. (2004) Dennis, P. G., Miller, Tony, Valsami-Jones, E., Taylor, R. G., Hirsch, Penny
  • Release of transgenic bacterial inoculants - rhizobia as a case study. (2004) Hirsch, Penny
  • Variation in Pochonia chlamydosporia and its potential as a biological control agent for root-knot nematodes. (2004) Kerry, B. R., Atkins, S. D., Mauchline, Tim, Morton, C. O., Hirsch, Penny
  • Development of a new management strategy for the control of root-knot nematodes (Meloidogyne spp) in organic vegetable production. (2003) Atkins, S. D., Hidalgo-Diaz, L., Kalisz, H., Mauchline, Tim, Hirsch, Penny, Kerry, B. R. picture_as_pdf
  • Cloning of and genetic variation in protease VCP1 from the nematophagous fungus Pochonia chlamydosporia. (2003) Morton, C. O., Hirsch, Penny, Peberdy, J. P., Kerry, B. R.
  • Detection and quantification of Plectosphaerella cucumerina , a potential biological control agent of potato cyst nematodes, by using conventional PCR, real-time PCR, selective media, and baiting. (2003) Atkins, S. D., Clark, Ian, Sosnowska, D., Hirsch, Penny, Kerry, B. R.
  • Detection and quantification of Plectosphaerella cucumerina , a potential biological control agent of potato cyst nematodes, using real-time PCR. (2003) Atkins, S. D., Clark, Ian, Sosnowska, D., Hirsch, Penny, Kerry, B. R.
  • How does Pochonia chlamydosporia limit populations of root-knot nematodes? (2003) Kerry, B. R., Atkins, S. D., Gray, P., Hidalgo-Diaz, L., Hirsch, Penny, Mauchline, Tim, Morton, C. O.
  • Isolates of the generalist parasite Pochonia chlamydosporia have specific interactions with their nematode hosts. (2003) Kerry, B. R., Morton, C. O., Mauchline, Tim, Hirsch, Penny
  • Nutrient dynamics in the rhizosphere. (2003) Hirsch, Penny, Miller, Tony
  • PCR-based DNA fingerprinting indicates host-related genetic variation in the nematophagous fungus Pochonia chlamydosporia. (2003) Morton, C. O., Mauchline, Tim, Kerry, B. R., Hirsch, Penny
  • A case study: the soil ecosystem. (2003) Hirsch, Penny
  • The influence of the root-knot nematode Meloidogyne incognita , the nematicide aldicarb and the nematophagous fungus Pochonia chlamydosporia on heterotrophic bacteria in soil and the rhizosphere. (2003) O'flaherty, S. M., Hirsch, Penny, Kerry, B. R.
  • Changes in the population structure of beta-group autotrophic ammonia oxidising bacteria in arable soils in response to agricultural practice. (2002) Mendum, T. A., Hirsch, Penny
  • Failure of the Mycobacterium bovis BCG vaccine: some species of environmental mycobacteria block multiplication of BCG and induction of protective immunity to tuberculosis. (2002) Brandt, L., Feino Cunha, J., Weinreich, O. A., Chilima, B., Hirsch, Penny, Appelberg, R., Andersen, P. picture_as_pdf
  • Fate of GM rhizobial inoculants: lessons from Europe and elsewhere. (2002) Hirsch, Penny
  • Genetic and functional diversity in the rhizosphere of oilseed rape, wheat and potatoes. (2002) Gilliam, L. M., Clark, Ian, Hirsch, Penny
  • Impact of GM bacterial inoculants on the soil microbial community. (2002) Hirsch, Penny, Clark, Ian
  • Interactions in the root environment - an integrated approach. The Rothamsted Millennium Conference. (2002) Powlson, David, Bateman, Geoff, Davies, K. G., Gaunt, J. L., Hirsch, Penny
  • Isolates of the generalist parasite Pochonia chlamydosporia have specific interactions with their nematode hosts. (2002) Kerry, B. R., Morton, C. O., Mauchline, Tim, Hirsch, Penny
  • Quantification in soil and the rhizosphere of the nematophagous fungus Verticillium chlamydosporium by competitive PCR and comparison with selective plating. (2002) Mauchline, Tim, Kerry, B. R., Hirsch, Penny
  • Release of transgenic bacterial inoculants in Europe. (2002) Hirsch, Penny
  • Variance in Pochonia chlamydosporia and its importance in the regulation of nematode populations in the rhizosphere. (2002) Kerry, B. R., Morton, C. O., Mauchline, Tim, Hirsch, Penny
  • The fate of genetically modified rhizobial inoculants in the field. (2002) Hirsch, Penny, Clark, Ian
  • The influence of the symbiotic plasmid pRL1J1 on the distribution of GM rhizobia in soil and crop rhizospheres, and implications for gene flow. (2002) Clark, Ian, Mendum, T. A., Hirsch, Penny
  • The role of the rhizobium symbiotic plasmid in survival in the soil and the rhizosphere. (2002) Clark, Ian, Hirsch, Penny
  • Acquisition of genes from indigenous bacteria by inoculant strains at long-term release sites. (2001) Hirsch, Penny
  • Assessing the risks involved in the release of genetically manipulated microorganisms. (2001) Amarger, N., Hirsch, Penny, Klingmuller, W.
  • Characterization of two novel Rhizobium leguminosarum bacteriophages from a field release site of genetically-modified rhizobia. (2001) Mendum, T. A., Clark, Ian, Hirsch, Penny
  • Comparison of phenotypic, functional and genetic diversity of bacterial communities in soils. (2001) O'flaherty, S., McGrath, Steve, Hirsch, Penny
  • Foreword to Proceedings of the Rothamsted Millennium Conference on Interactions in the Root Environment. (2001) Powlson, David, Bateman, Geoff, Davies, K. G., Gaunt, J. L., Hirsch, Penny, Barlow, P. W. picture_as_pdf
  • Measurement of the impact of Verticillium chlamydosporium on the dynamics of sedentary nematodes in the rhizosphere. (2001) Kerry, B. R., Atkins, S. D., Mauchline, Tim, Hirsch, Penny
  • Methods for studying the nematophagous fungus Verticillium chlamydosporium in the root environment. (2001) Hirsch, Penny, Atkins, S. D., Mauchline, Tim, Morton, C. O., Davies, K. G., Kerry, B. R. picture_as_pdf
  • Microbial diversity in heavy metal-contaminated soils - microbial indicators of soil quality. (2001) Abaye, D., Lawlor, K., Hirsch, Penny, Brookes, Philip
  • Molecular approaches to studies of the interactions of Verticillium chlamydosporium in the rhizosphere of root-knot nematode infected plants. (2001) Kerry, B. R., O'flaherty, S., Mauchline, Tim, Morton, C. O., Hirsch, Penny
  • Soil microbial fatty acids as indicators of heavy metal pollution and soil quality. (2001) Abaye, D., Lawlor, K., Hirsch, Penny, Brookes, Philip
  • Transgenic releases, analysis of gene flow and fluctuations in indigenous bacterial communities. (2001) Hirsch, Penny
  • Understanding and exploiting interactions between nitrogen-fixing bacteria and plants. (2001) Hirsch, Penny, Micanovic, D.
  • The role of soil microorganisms in soil organic matter conservation in the tropics. (2001) Powlson, David, Hirsch, Penny, Brookes, Philip picture_as_pdf
  • Comparison of methods to investigate microbial populations in soils under different agricultural management. (2000) Lawlor, K., Knight, B. P., Barbosa-Jefferson, V. L., Lane, P. W., Lilley, A. K., Paton, G. I., McGrath, Steve, O'flaherty, S., Hirsch, Penny
  • Detection of the nematophagous fungus Verticillium chlamydosporium in nematode-infested plant roots using PCR. (2000) Hirsch, Penny, Mauchline, Tim, Mendum, T. A., Kerry, B. R. picture_as_pdf
  • Development of a transformation system for the root-knot nematode biological control fungus Verticillium chlamydosporium. (2000) Atkins, S. D., Peberdy, J., Kerry, B. R., Hirsch, Penny
  • Ecology of plasmid transfer and spread. (2000) Van Elsas, J. D., Fry, J., Hirsch, Penny, Molin, S.
  • Inference of symbiotic plasmid involvement in the population dynamics of two GM rhizobia under different agricultural practices. (2000) Clark, Ian, Mendum, T. A., Hirsch, Penny
  • Molecular methods to study the rhizosphere interactions of Verticillium chlamydosporium. (2000) Kerry, B. R., Mauchline, Tim, Atkins, S. D., Davies, K. G., Hirsch, Penny
  • The PCR amplification of non-tuberculous mycobacterial 16S rRNA sequences from soil. (2000) Mendum, T. A., Chilima, B. Z., Hirsch, Penny
  • Soil microbial fatty acids as indicators of soil quality. (2000) Abaye, D., Lawlor, K., Hirsch, Penny, Brookes, Philip
  • The diversity, activity and size of ammonia oxidising populations. (2000) Mendum, T. A., Hirsch, Penny
  • Competitive PCR to monitor ammonia oxidisers in a 150 year old field experiment. (1999) Mendum, T. A., Sockett, R. E., Hirsch, Penny
  • Development of a transformation system for the nematode biological control fungus Verticillium chlamydosporium. (1999) Atkins, S. D., Peberdy, J., Kerry, B. R., Hirsch, Penny
  • Do changes in land management influence soil microbial function? (1999) O'flaherty, S. M., Murphy, D. V., Goulding, Keith, Hirsch, Penny
  • Gene transfer in bacteria from soils contaminated with heavy metals. (1999) Lawlor, K., Chaudri, A. M., McGrath, Steve, Hirsch, Penny
  • Interactions between rhizobia and bacteriophages isolated from soil. (1999) Mendum, T. A., Clark, Ian, Hirsch, Penny
  • Investigating genetic and functional shifts in metal contaminated soils. (1999) O'flaherty, S. M., Hirsch, Penny
  • Microbial diversity - an indication of soil quality? (1999) O'flaherty, S. M., McGrath, Steve, Hirsch, Penny
  • Microbial diversity - an indication of soil quality? (1999) O'flaherty, S. M., McGrath, Steve, Hirsch, Penny
  • Use of molecular and isotopic techniques to monitor the response of autotrophic ammonia-oxidizing populations of the beta subdivision of the class Proteobacteria in arable soils to nitrogen fertilizer. (1999) Mendum, T. A., Sockett, R. E., Hirsch, Penny picture_as_pdf
  • The field release and monitoring of GUS-marked rhizobial strain CT0370. (1999) Hirsch, Penny, Mendum, T. A., Puhler, A., Selbitschka, W.
  • The genetic implications of bacteriophages in Rhizobium leguminosarum. (1999) Mendum, T. A., Clark, Ian, Hirsch, Penny
  • Bacterial diversity in metal contaminated soils. (1998) Lawlor, K., Barbosa-Jefferson, V., McGrath, Steve, O'flaherty, S., Hirsch, Penny
  • Immunological quantification in soil of Pasteuria penetrans , an unculturable bacteria, hyperparasite of plant-parasitic nematodes. (1998) Fould, S., Davies, K. G., Hirsch, Penny, Dieng, L., Dabire, K. R., Diop, M. T., Normand, P., Mateille, T.
  • Microbial diversity in agricultural soil. (1998) O'flaherty, S., Lawlor, K., McGrath, Steve, Kerry, B. R., Hirsch, Penny
  • Monitoring genetically modified rhizobia in field soils using the polymerase chain reaction. (1998) Cullen, D. W., Nicholson, P. S., Mendum, T. A., Hirsch, Penny picture_as_pdf
  • Plant genotype and micronutrient status influence colonization of wheat roots by soil bacteria. (1998) Rengel, Z., Ross, G., Hirsch, Penny
  • Simple and rapid method for direct extraction of microbial DNA from soil for PCR. (1998) Cullen, D. W., Hirsch, Penny picture_as_pdf
  • The detection of Gram negative bacterial mRNA from soil by RT-PCR. (1998) Mendum, T. A., Sockett, R. E., Hirsch, Penny picture_as_pdf
  • The effects of pesticides on the diversity of culturable soil bacteria. (1998) Nicholson, P. S., Hirsch, Penny picture_as_pdf
  • Acquisition of genes from indigenous bacteria by inoculant strains at long-term release sites. (1997) Hirsch, Penny
  • Genetic basis of wheat roots colonisation by pseudomonads. (1997) Curnow, P., Hirsch, Penny
  • Occurrence of flavonoids and nucleosides in agricultural soils. (1997) Phillips, D. A., Joseph, C. M., Hirsch, Penny picture_as_pdf
  • The role of available metal ions in the transfer of mobile genetic elements. (1997) Lawlor, K., Barbosa-Jefferson, V., Chaudri, A., McGrath, Steve, Hirsch, Penny
  • Bacteriophages and genetically modified rhizobia in the field. (1996) Hirsch, Penny, Mendum, T. A.
  • Genetic basis of wheat roots colonisation by pseudomonads. (1996) Curnow, P., Hirsch, Penny
  • Genetic exchange between field rhizobia mediated by plasmids and bacteriophage. (1996) Mendum, T. A., Hirsch, Penny
  • Know your genes. (1996) Hirsch, Penny
  • Molecular tools for monitoring bacterial gene transfer in the field. (1996) Hirsch, Penny, Young, P., Amarger, N., Toro, N., Lotz, W., Selbitschka, W.
  • PCR-based molecular discrimination of Verticillium chlamydosporium isolates. (1996) Arora, D. K., Hirsch, Penny, Kerry, B. R. picture_as_pdf
  • Plant genotype, micronutrient fertilization and take-all infection influence bacterial populations in the rhizosphere of wheat. (1996) Rengel, Z., Gutteridge, R. J., Hirsch, Penny, Hornby, D. picture_as_pdf
  • Population dynamics of indigenous and genetically modified rhizobia in the field. (1996) Hirsch, Penny picture_as_pdf
  • Potential manipulation of crop rhizosphere. (1996) Hirsch, Penny
  • Rhizobial genetic elements and the extent of genetic interactions in the field. (1996) Hirsch, Penny, Mendum, T. A.
  • Targets for introduction of pests and disease resistance into crops by genetic engineering: report of a review funded by MAFF. (1995) Pierpoint, William Stanley, Hughes, K. J. D., Shewry, Peter, Burrows, P. R., Henderson, I. F., Hirsch, Penny, Hughes, K. J. D., James, S., Lazzeri, Paul A., Miflin, Benjamin J., Plumb, Roger, Glen, D. M., Hargreaves, J. A., Elphinstone, John G., Stead, D. E.
  • Acquisition of genes from indigenous bacteria by inoculant strains at long-term release sites. (1995) Hirsch, Penny
  • Conjugative plasmids in Rhizobium. (1995) Hirsch, Penny, Mendum, T. A.
  • Construction and characterization of a Rhizobium leguminosarum biovar viciae strain designed to assess horizontal gene transfer in the environment. (1995) Selbitschka, W., Jording, D., Nieman, S., Schmidt, R., Puhler, A., Mendum, T. A., Hirsch, Penny picture_as_pdf
  • Detection of microbial DNA sequences by colony hybridization. (1995) Hirsch, Penny
  • Field release of genetically modified Rhizobia in the UK. (1995) Hirsch, Penny, Mendum, T. A., Jording, D., Selbitschka, W.
  • Monitoring genetically manipulated rhizobia in field soil samples. (1995) Hirsch, Penny, Nicholson, P., Cullen, D.
  • Monitoring genetically modified microorganisms following field release. (1995) Hirsch, Penny
  • Population dynamics of indigenous and genetically modified rhizobia in the field. (1995) Hirsch, Penny
  • Acquisition of genes from indigenous bacteria by inoculant strains at long-term release sites. (1994) Hirsch, Penny, Young, P., Amarger, N., Toro, N., Lotz, W., Selbitschka, W.
  • Field release of genetically modified Rhizobium leguminosarum biovar viciae. (1994) Hirsch, Penny, Mendum, T. A.
  • Investigating bacterial root colonization in soils with long-term wheat cultivation. (1994) Hirsch, Penny, Ross, G.
  • Survival and dispersion of genetically modified rhizobia in the field and genetic interactions with native strains. (1994) Hirsch, Penny, Spokes, J. D.
  • The extent of gene transfer in deliberate release experiments. (1994) Hirsch, Penny
  • Acquisition of genes from indigenous bacteria by inoculant strains at long-term release sites. (1993) Hirsch, Penny, Young, P., Amarger, N., Toro, N., Lotz, W., Selbitschka, W.
  • Behaviour of genetically modified rhizobia in the field. (1993) Hirsch, Penny
  • Heavy metals from past applications of sewage sludge decrease the genetic diversity of Rhizobium leguminosarum biovar Trifolii populations. (1993) Hirsch, Penny, Jones, M. J., McGrath, Steve, Giller, K. E.
  • Investigating gene transfer in soil using genetically modified rhizobia. (1993) Hirsch, Penny, Mendum, T. A.
  • Molecular approaches to monitoring bacteria in soil. (1993) Hirsch, Penny, Nicholson, P. S., Cullen, D. W.
  • Techniques for monitoring rhizobia in the field. (1993) Hirsch, Penny, Nicholson, P. S., Cullen, D. W.
  • Crop plants effects on field populations of rhizobia. (1992) Hirsch, Penny, Jones, M., Spokes, J.
  • Monitoring survival of genetically-modified Rhizobium in the field. (1992) Nicholson, P. S., Jones, M. J., Hirsch, Penny
  • The identification and classification of Rhizobium and Bradyrhizobium. (1992) Hirsch, Penny
  • Assessing the risks involved in the release of genetically manipulated microorganisms. (1991) Armarger, N., Hirsch, Penny, Klingmuller, W.
  • Assessing the risks involved in the release of genetically manipulated microorganisms. (1991) Armarger, N., Hirsch, Penny, Klingmuller, W.
  • Assessing the risks involved in the release of genetically manipulated microorganisms. (1990) Amarger, N., Hirsch, Penny, Klingmuller, W.
  • Assessing the risks involved in the release of genetically manipulated microorganisms. (1990) Amarger, N., Hirsch, Penny, Klingmuller, W.
  • Comparison of late Sym genes in Rhizobium species and construction of improved strains. (1990) Boistard, P., Hirsch, Penny, O'Connell, M., Puhler, A.
  • Comparison of late Sym genes in Rhizobium species and construction of improved strains. (1990) Boistard, P., Hirsch, Penny, O'Connell, M., Puhler, A., Priefer, U. B.
  • Factors limiting gene transfer in bacteria. (1990) Hirsch, Penny
  • The rhizobium-legume symbiosis. (1990) Hirsch, Penny, O'Connell, M., Boistard, P., Puhler, A., Priefer, U. B.
  • Absence of nitrogen fixation in clover grown on soil subject to long-term contamination with heavy metals is due to survival of only ineffective Rhizobium. (1989) Giller, K. E., McGrath, Steve, Hirsch, Penny
  • Field release of rhizobia marked with a transposon. (1989) Hirsch, Penny, Spokes, J. R.
  • Monitoring genetically manipulated rhizobial inoculants following intentional introduction in agricultural soils. (1989) Hirsch, Penny, Spokes, J. R., Klingmuller, W., Dohler, K., Amarger, N., Delgutte, D.
  • Past, present and future uses of Rhizobium inoculants. (1989) Hirsch, Penny
  • Rhizobium meliloti FIXGHI and FIXNOQP sequences predict involvement of a specific cation pump and of a cytochrome in symbiotic nitrogen fixation. (1989) Kahn, D., Boistard, P., David, M., Da Veran Mingot, M. L., Hirsch, Penny, Batut, J.
  • Rhizobium meliloti fixGHI sequence predicts involvement of a specific cation pump in symbiotic nitrogen fixation. (1989) Kahn, D., David, M., Domergue, O., Daveran, M-L., Ghai, J., Hirsch, Penny, Batut, J. picture_as_pdf
  • Assessing the environmental risks of releasing genetically manipulated organisms. (1988) Hirsch, Penny
  • Assessing the risks involved in the release of genetically manipulated microorganisms. (1988) Hirsch, Penny
  • Comparison of late Sym genes in Rhizobium species and construction of improved strains. (1988) Hirsch, Penny
  • Effect of heavy metal contamination on the genetics of nitrogen-fixing populations of Rhizobium leguminosarum nodulating white clover. (1988) McGrath, Steve, Hirsch, Penny, Giller, K. E.
  • Field release of rhizobia marked with a transposon. (1988) Hirsch, Penny, Spokes, J. R.
  • Gene transfer between rhizobia in controlled conditions and the field. (1988) Spokes, J. R., Hirsch, Penny
  • Mutation, transfer and location of symbiotic genes of Rhizobium leguminosarum biovar phaseoli by insertion of Tn5-Mob. (1988) Wang, C. L., Hirsch, Penny
  • Rhizobia isolated from root nodules of clover grown on soils with heavy metal contamination. (1988) Hirsch, Penny, Giller, K. E., McGrath, Steve
  • Rhizobium leguminosarum as a model for investigating gene transfer in soil. (1988) Hirsch, Penny, Spokes, J.
  • Suppression of N2-fixation in clover on soil contaminated with heavy metals. (1988) Giller, K. E., McGrath, Steve, Hirsch, Penny
  • Construction of a Tn5 derivative determining resistance to gentamicin and spectinomycin using a fragment cloned from R1033. (1986) Hirsch, Penny, Wang, C. L., Woodward, M. J.
  • Gene cloning and its potential application to mycorrhizal fungi. (1986) Hirsch, Penny
  • Genetic factors in Rhizobium affecting the symbiotic carbon costs of N2 fixation and host plant biomass production. (1986) Skot, L., Hirsch, Penny, Witty, J. F.
  • Host plant effects on hybrids of Rhizobium leguminosarum Biovars viceae and trifolii . (1986) Wang, C. L., Beringer, J. E., Hirsch, Penny
  • Nitrogen-fixation. (1985) Beringer, J. E., Hirsch, Penny, Witty, J. F.
  • Transposon mutagenesis of Rhizobium using a derivitive of Tn5 conferring gentamicin and spectinomycin resistance. (1985) Wang, C. L., Spokes, J. R., Woodward, M. J., Hirsch, Penny
  • Agrobacterium tumefaciens T-DNA in the yeast Saccharomyces cerevisiae. (1984) Hirsch, Penny, Beggs, J. D.
  • Genetic adaptation to the environment. The role of plasmids in microbial ecology. (1984) Beringer, J. E., Hirsch, Penny
  • Genetic engineering and nitrogen fixation. (1984) Beringer, J. E., Hirsch, Penny
  • Improved crop plant productivity through genetic manipulation of mycorrhizal fungi. (1984) Hirsch, Penny
  • Rothamsted Multidisciplinary Agronomy. (1984) Thorne, G. N., Prew, R. D., williams, Lacey, J., Plumb, Roger, Hirsch, Penny, Church, B. M., Todd, A. D., Carter, N.
  • Rothamsted Multidisciplinary Agronomy. (1983) Thorne, G. N., Dewar, A. M., Prew, R. D., williams, Lacey, J., Plumb, Roger, Hirsch, Penny, Church, B. M., Todd, A. D.
  • Plasmid-determined Bacteriocin Production by Rhizobium leguminosarum. (1979) Hirsch, Penny