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Plant Molecular Biology

, Volume 37, Issue 3, pp 455–469 | Cite as

A comparison of the expression patterns of several senescence-associated genes in response to stress and hormone treatment

  • Louis M. Weaver
  • Susheng Gan
  • Betania Quirino
  • Richard M. Amasino
Article

Abstract

The expression of several Arabidopsis thaliana senescence-associated genes (SAGs) in attached and/or detached leaves was compared in response to age, dehydration, darkness, abscisic acid, cytokinin, and ethylene treatments. Most of the SAGs responded to most of the treatments in a similar fashion. Detachment in darkness and ethylene were the strongest inducers of both SAGs and visible yellowing. Detachment in light was also a strong inducer of SAGs, but not of visible yellowing. The other treatments varied more in their effects on individual SAGs. Responses were examined in both older and younger leaves, and generally were much stronger in the older ones. Individual SAGs differed from the norms in different ways, however, suggesting that their gene products play a role in overlapping but not identical circumstances. Some SAGs responded quickly to treatments, which may indicate a direct response. Others responded more slowly, which may indicate an indirect response via treatment-induced senescence. Four new SAGs were isolated as part of this work, one of which shows strong similarity to late embryogenesis-abundant (Lea) genes.

gene expression phytohormone Lea leaf senescence senescence-associated gene stress 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Louis M. Weaver
    • 1
  • Susheng Gan
    • 2
  • Betania Quirino
    • 1
  • Richard M. Amasino
    • 1
  1. 1.Dept. of BiochemistryUniversity of Wisconsin at MadisonMadison, s[WIUSA
  2. 2.Tobacco and Health Research Institute and Dept. of AgronomyUniversity of KentuckyLexingtonUSA

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