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iTRAQ-Based Quantitative Proteomics Analysis on Rice Anther Responding to High Temperature.

Qilin Mu1,2, Wenying Zhang3,4, Yunbo Zhang5,6

  • 1Agricultural College, Yangtze University, Jingzhou 434025, China. mql325@163.com.

International Journal of Molecular Sciences
|August 24, 2017
PubMed
Summary
This summary is machine-generated.

High temperature stress impacts rice production by reducing fertility. Resistant rice cultivars maintain fertility by protecting protein synthesis and increasing heat shock proteins, unlike sensitive ones.

Keywords:
high temperatureiTRAQproteomicsricespikelet fertility

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Area of Science:

  • Plant Science
  • Proteomics
  • Agricultural Science

Background:

  • Rice is a vital global food crop, but its production is threatened by environmental stressors.
  • High temperature stress (HS) during anthesis significantly reduces rice spikelet fertility and yield.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying high temperature stress tolerance in rice.
  • To compare proteomic changes in anthers of HS-resistant and HS-sensitive rice cultivars under HS.

Main Methods:

  • Comparative proteomics analysis of rice anthers from resistant and sensitive cultivars.
  • Exposure to varying levels of high temperature stress during the anthesis stage.

Main Results:

  • HS-resistant cultivars exhibited significantly higher spikelet fertility than sensitive cultivars under identical HS conditions.
  • High temperature stress induced degradation of ribosomal proteins in sensitive cultivars, impairing protein biosynthesis.
  • Resistant cultivars showed increased levels of small heat shock proteins (sHSPs), β-expansins, and lipid transfer proteins under HS.

Conclusions:

  • Differential protein expression, particularly ribosomal protein stability and induction of protective proteins, contributes to rice high temperature stress tolerance.
  • These findings offer novel insights into the plant's response mechanisms to thermal stress in rice.