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Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (8): 186-198.DOI: 10.11686/cyxb2020579

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Research progress on the seed-shattering mechanism of Poaceae plants

Wen-gang XIE1(), Yi-yang WAN1, Zong-yu ZHANG1, Jun-chao ZHANG2   

  1. 1.State Key Laboratory of Grassland Agro-ecosystems,Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Affairs,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
    2.Institute of Qinghai-Tibetan Plateau,Southwest University for Nationalities,Chengdu 610041,China
  • Received:2020-12-16 Revised:2021-01-19 Online:2021-07-09 Published:2021-07-09
  • Contact: Wen-gang XIE

Abstract:

Seed shattering is an adaptive characteristic of wild plants for effective reproduction and population expansion, but it adversely affects seed production. The formation, development, and degradation of the abscission zone are the direct causes of seed shattering in plants. Plant hormones produce signals that promote or inhibit seed shattering. Cell wall hydrolases can cause the degradation of cells in the abscission zone. The occurrence of these processes is regulated by polygenes and the regulatory network is complex. Research on seed shattering has been carried out in rice, wheat, and other crops, but comparatively few studies have focused on forage grasses. In this paper, we review the latest advances in research on seed shattering in poaceous plants to provide a theoretical reference for in-depth exploration of seed-shattering mechanisms and species selection.

Key words: forage grass, seed, abscission zone, seed shattering, molecular mechanism