Proteome changes associated with dormancy release of Dongxiang wild rice seeds

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  • Heng Heng Xu, Institute of Botany, Chinese Academy of Sciences
  • ,
  • Shu Jun Liu, Institute of Botany, Chinese Academy of Sciences
  • ,
  • Shun Hua Song, Beijing Academy of Agriculture and Forestry Sciences
  • ,
  • Wei Qing Wang, Institute of Botany, Chinese Academy of Sciences
  • ,
  • Ian Max Møller
  • Song Quan Song, Institute of Botany, Chinese Academy of Sciences

Seed dormancy provides optimum timing for seed germination and subsequent seedling growth, but the mechanism of seed dormancy is still poorly understood. Here, we used Dongxiang wild rice (DXWR) seeds to investigate the dormancy behavior and the differentially changed proteome in embryo and endosperm during dormancy release. DXWR seed dormancy was caused by interaction of embryo and its surrounding structure, and was an intermediate physiological dormancy. During seed dormancy release, a total of 109 and 97 protein spots showed significant change in abundance and were successfully identified in embryo and endosperm, respectively. As a result of dormancy release, the abundance of nine proteins involved in storage protein, cell defense and rescue and energy changed in the same way in both embryo and endosperm, while 67 and 49 protein spots changed differentially in embryo and endosperm, respectively. Dormancy release of DXWR seeds was closely associated with degradation of storage proteins in both embryo and endosperm. At the same time, the abundance of proteins involved in metabolism, glycolysis and TCA cycle, cell growth and division, protein synthesis and destination and signal transduction increased in embryos while staying constant or decreasing in endosperms.

Original languageEnglish
JournalJournal of Plant Physiology
Volume206
Pages (from-to)68-86
Number of pages19
ISSN0176-1617
DOIs
Publication statusPublished - 1 Nov 2016

    Research areas

  • Dongxiang wild rice, Dormancy release, Embryo, Endosperm, Proteome, Seed dormancy

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