Research Progress of Seed Dormancy and Germination Regulation by Abscisic Acid and Gibberellin
Timely seed dormancy and germination ensures that plants could successively survive and subsequently propagate under various environmental conditions,which is precisely regulated by endogenous phytohormones and exogenous environmental factors.In recent years,significant progress has been made in the regulation of seed dormancy and germination by abscisic acid(ABA)and gibberellin(GA),particularly with regard to the interaction between them.This article elaborates the molecular mechanisms underlying seed dormancy and germination regulated by the metabolism and signal transduction of ABA and GA at the transcriptional and post-translational levels.It further explores the antagonistic effects and interactions in mediating seed dormancy and germination between ABA and GA.Lastly,it comprehensively summarizes the research progress on the regulatory mechanisms by which the metabolism and signaling pathway of ABA and GA finely regulate seed dormancy and germination in response to external light and temperature signals.The aim of this review is to provide a better understanding of the hormone regulatory network of seed dormancy and germination and theoretical references for future in-depth studies on the mechanisms of seed dormancy and germination regulation by ABA and GA.
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