光调控植物种子萌发分子机制研究进展OA北大核心CSTPCD

Germination is the key development stage for seed plants entering the agricultural ecosystem.For light-requiring seeds,light is one of the most important environmental signals regulating germination.Red light promotes,whereas far-red light inhibits seed germination.Phytochromes are the major photoreceptors that regulate seed germination.Activated phytochromes promote the degradation of Phytochrome-Interacting-Factor 1(PIF1),the master repressor of germination,to regulate the expression of genes related to gibberellin and abscisic metabolism and signaling pathways,leading to the initiation of seed germination.Furthermore,a series of epigenetic factors dynamically affect the chromatin structure of germination-related genes and regulate their expression to modulate seed germination process.Here,we summarize the progress,especially the transcriptional and epigenetic mechanisms in light-regulated seed germination,and discuss their applications in agricultural production in future.