研究报告

Proteomics Analysis of Nutrient Stress Effect on Rice Leaf Senescence at Grain Filling Stage

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  • (1College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China; 2Soil and Fertilizer & Resource and Environment Institute,Jiangxi Academy of Agricultural Sciences,Nanchang 330200, China; ﹟These authors contributed equally to this paper; *Corresponding author, E-mail: shiqh@nc.jx.cn)

Received date: 2010-05-07

  Revised date: 2010-06-08

  Online published: 2011-03-11

Abstract

In order to reveal the molecular senescence mechanism of rice under nutrient stress at grain filling stage, the protein expression profile of functional leaves in hybrid rice Weiyou 916 was investigated by the approach of proteomics. Proteins were extracted from rice flag leaf and separated by two-dimensional gel electrophoresis. Thirty-four differentially expressed proteins were obtained, among which 26 were identified by matrix-assisted laser desorption/ionization-time of flight mass spectrometry, and categorized into four groups of functions: 11 proteins were associated with photosynthesis, four proteins were associated with respiration, 10 proteins were related to antioxidative pathways and signal transmitting and one protein was putative protein. The functions of these 26 proteins were analyzed and the conclusion could be drawn from the following results: under nutrient stress conditions, photosynthesis and respiration of rice leaf declined significantly; proteins associated with antioxidative pathways decreased in expression abundance, and proteins associated with active oxygen synthesis and signaling showed drastical increase in expression abundance, which resulted in reduced resistance and accumulated active oxygen, consequently accelerated rice senescence process.

Cite this article

XIE Jin-shui ,SHAO Cai-hong ,TANG Xiu-ying ,SHI Qing-hua . Proteomics Analysis of Nutrient Stress Effect on Rice Leaf Senescence at Grain Filling Stage[J]. Chinese Journal OF Rice Science, 2011 , 25(2) : 143 -149 . DOI: 10.3969/j.issn.1001-7216.2011.02.004

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