The Role of Arabidopsis Rubisco Activase in Jasmonate-Induced Leaf Senescence

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  • Xiaoyi Shan
    MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China (X.S., W.P., D.X.); Institute of Molecular and Cell Biology, Singapore 138673 (J.W., L.C.); and College of Life Sciences, Zhejiang University, Hangzhou 310029, China (D.J.)
  • Junxia Wang
    MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China (X.S., W.P., D.X.); Institute of Molecular and Cell Biology, Singapore 138673 (J.W., L.C.); and College of Life Sciences, Zhejiang University, Hangzhou 310029, China (D.J.)
  • Lingling Chua
    MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China (X.S., W.P., D.X.); Institute of Molecular and Cell Biology, Singapore 138673 (J.W., L.C.); and College of Life Sciences, Zhejiang University, Hangzhou 310029, China (D.J.)
  • Dean Jiang
    MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China (X.S., W.P., D.X.); Institute of Molecular and Cell Biology, Singapore 138673 (J.W., L.C.); and College of Life Sciences, Zhejiang University, Hangzhou 310029, China (D.J.)
  • Wen Peng
    MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China (X.S., W.P., D.X.); Institute of Molecular and Cell Biology, Singapore 138673 (J.W., L.C.); and College of Life Sciences, Zhejiang University, Hangzhou 310029, China (D.J.)
  • Daoxin Xie
    MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China (X.S., W.P., D.X.); Institute of Molecular and Cell Biology, Singapore 138673 (J.W., L.C.); and College of Life Sciences, Zhejiang University, Hangzhou 310029, China (D.J.)

Description

<jats:title>Abstract</jats:title> <jats:p>Leaf senescence, as the last stage of leaf development, is regulated by diverse developmental and environmental factors. Jasmonates (JAs) have been shown to induce leaf senescence in several plant species; however, the molecular mechanism for JA-induced leaf senescence remains unknown. In this study, proteomic, genetic, and physiological approaches were used to reveal the molecular basis of JA-induced leaf senescence in Arabidopsis (Arabidopsis thaliana). We identified 35 coronatine-insensitive 1 (COI1)-dependent JA-regulated proteins using two-dimensional difference gel electrophoresis in Arabidopsis. Among these 35 proteins, Rubisco activase (RCA) was a COI1-dependent JA-repressed protein. We found that RCA was down-regulated at the levels of transcript and protein abundance by JA in a COI1-dependent manner. We further found that loss of RCA led to typical senescence-associated features and that the COI1-dependent JA repression of RCA played an important role in JA-induced leaf senescence.</jats:p>

Journal

  • Plant Physiology

    Plant Physiology 155 (2), 751-764, 2010-12-20

    Oxford University Press (OUP)

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