10
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

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

      Plant, Cell & Environment
      Arabidopsis, growth & development, microbiology, physiology, Arabidopsis Proteins, genetics, metabolism, Botrytis, Cell Aging, Gene Expression Regulation, Mitochondria, Organ Specificity, Oxidation-Reduction, Phenotype, Plant Components, Aerial, Plant Diseases, Plant Roots, Plants, Genetically Modified, Pseudomonas syringae, Reactive Oxygen Species, Recombinant Fusion Proteins, Seedling, Signal Transduction, Stress, Physiological, Time Factors

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          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. © 2011 Blackwell Publishing Ltd.

          Related collections

          Author and article information

          Comments

          Comment on this article