光调控植物种子萌发分子机制研究进展  

Research Progress of the Molecular Mechanisms of Light-regulated Plant Seed Germination

作　　者：王雅寒 刘勋成[1,2] WANG Yahan;LIU Xuncheng(South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;South China National Botanical Garden,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院华南植物园,广州510650 [2]华南国家植物园,广州510650 [3]中国科学院大学,北京100049

出　　处：《热带亚热带植物学报》2024年第2期294-300,共7页Journal of Tropical and Subtropical Botany

基　　金：国家自然科学基金项目(32070551,31771366)资助。

摘　　要：萌发是种子植物进入农业生态系统的重要发育阶段。对于需光类种子,光是调控其萌发最重要的环境信号因子之一,红光促进而远红光抑制种子萌发。光敏色素是调控种子萌发的主要光受体。活化的光敏色素诱导萌发主效抑制因子PIF1发生蛋白降解,调节赤霉素和脱落酸代谢和信号途径相关基因的表达,从而促进种子的萌发。同时,一系列的表观遗传因子通过改变染色质结构,动态调节萌发相关基因的表达从而影响种子的萌发进程。该论文重点论述了光调控种子萌发的转录及表观遗传机制研究进展,并对其在农业生产中的应用进行了展望。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.

关 键 词：光信号 种子萌发 光敏色素 植物激素 转录调控 表观遗传 

分 类 号：Q945.34[生物学—植物学]