A - Papers appearing in refereed journals
Yang, X., Pan, H., Wang, P. and Zhao, F-J. 2017. Particle-specific toxicity and bioavailability of cerium oxide (CeO2) nanoparticles to Arabidopsis thaliana. Journal Of Hazardous Materials. 322, pp. 292-300.
|Authors||Yang, X., Pan, H., Wang, P. and Zhao, F-J.|
Root exudation of phytase could improve the ability of plants to access organic forms of soil phosphorus (P), thereby minimizing fertilizer requirements and improving P use efficiency in agroecosystems. After 75 days growth in a high available P soil, shoot biomass and P accumulation, soil pH, and rhizosphere P depletion were investigated in Nicotiana tabacum wild-type and transgenic plant-lines expressing and exuding Aspergillus niger phytase (ex::phyA), or a null-vector control. Solution 31P NMR analysis revealed a 7% to 11% increase in orthophosphate and a comparable depletion of undefined monoester P compounds (-13 to -18%) in the rhizosphere of tobacco plants relative to the unplanted soil control. Wild-type plants had the greatest impact on the composition of rhizosphere P based on the depletion of other monoester P, polyphosphate, and phosphonate species. The depletion of phytase-labile P by ex::phyA plants was associated with decreased proportions of other monoester P, rather than myo-InsP6 as expected. Rhizosphere pH increased from 6.0 to 6.5-6.7 in transgenic plant soils, beyond the pH optimum for A. niger phyA activity (pH=5), and may explain the limited specificity of ex::phyA plants for phytate in this soil. The efficacy of single exudation traits (e.g., phytase) therefore appear to be limited in P-replete soil conditions and may be improved where soil pH matches the functional requirements of the enzyme or trait of interest.
|Year of Publication||2017|
|Journal||Journal Of Hazardous Materials|
|Journal citation||322, pp. 292-300|
|Digital Object Identifier (DOI)||doi:10.1016/j.jhazmat.2016.03.054|
|Open access||Published as non-open access|
|Funder project or code||Sustainability|
|Online||21 Mar 2016|
|Publication process dates|
|Accepted||20 Mar 2016|
|Elsevier Science Bv|
|Copyright license||Publisher copyright|
Permalink - https://repository.rothamsted.ac.uk/item/8v2z9/particle-specific-toxicity-and-bioavailability-of-cerium-oxide-ceo2-nanoparticles-to-arabidopsis-thaliana