A novel function for a redox-related LEA protein (SAG21/AtLEA5) in root development and biotic stress responses

A - Papers appearing in refereed journals

Salleh, F. M., Evans, K., Goodall, B., Machin, H., Mowla, S. B., Mur, L. A. J., Runions, J., Theodoulou, F. L., Foyer, C. H. and Rogers, H. J. 2012. A novel function for a redox-related LEA protein (SAG21/AtLEA5) in root development and biotic stress responses. Plant, Cell and Environment. 35 (2), pp. 418-429. https://doi.org/10.1111/j.1365-3040.2011.02394.x

AuthorsSalleh, F. M., Evans, K., Goodall, B., Machin, H., Mowla, S. B., Mur, L. A. J., Runions, J., Theodoulou, F. L., Foyer, C. H. and Rogers, H. J.
Abstract

SAG21/AtLEA5 belongs to the late embryogenesis-associated (LEA) protein family. Although it has been implicated in growth and redox responses, its precise roles remain obscure. To address this problem, we characterized root and shoot development and response to biotic stress in SAG21/AtLEA5 over-expressor (OEX) and antisense (AS) lines. AS lines exhibited earlier flowering and senescence and reduced shoot biomass. Primary root length was reduced in AS lines, as was the number of laterals relative to the primary root. Root hair number was unchanged but root hair length was proportional to SAG21/AtLEA5 expression level, with longer root hairs in OEX lines and shorter root hairs in AS, relative to wild type. Growth of the fungal nectroph, Botrytis cinerea and of a virulent bacterial pathogen (Pseudomonas syringae pv. tomato) was affected by SAG21/AtLEA5 expression; however, growth of an avirulent P.syringae strain was unaffected. A SAG21/AtLEA5-YFP fusion was localized to mitochondria, raising the intriguing possibility that SAG21 interacts with proteins involved in mitochondrial ROS signalling, which in turn, impacts on root development and pathogen responses.

KeywordsPlant Sciences
Year of Publication2012
JournalPlant, Cell and Environment
Journal citation35 (2), pp. 418-429
Digital Object Identifier (DOI)https://doi.org/10.1111/j.1365-3040.2011.02394.x
PubMed ID21736589
Open accessPublished as green open access
FunderMalaysian Government
Biotechnology and Biological Sciences Research Council
European Union - EU
Funder project or codeCentre for Crop Genetic Improvement (CGI)
Lipid transport and metabolism
Publisher's version
PublisherWiley
Wiley-Blackwell
Grant IDBB/F014074/1
ITN: PITN-GA-2008-215174
ISSN0140-7791

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