DOG1(Delay of germination 1)蛋白是种子休眠的一种主要调控因子,可与ABA协同作用来延迟种子萌发.核心脱落酸(ABA)信号转导途径和DOG1途径在蛋白磷酸酶2C(PP2C)中汇聚.DOG1调控种子休眠需要PP2C,并通过与ABA过敏感萌发(AHG1/AHG3)结合来增强ABA的信号转导.DOG1抑制AHG1的作用来增加ABA的敏感性和诱导种子休眠.近年来,DOG1对种子休眠与萌发的调控研究取得了显著进展.本文对该领域的研究成果进行了综述,主要包括:DOG1对种子成熟、休眠与萌发的作用,DOG1表达的转录调控机制以及DOG1对种子休眠与萌发的调控及作用机制,最后提出了在本领域需要进一步研究的科学问题.
Abstract
Delay of germination 1(DOG1)is a master regulator of seed dormancy and cooperates with ab-scisic acid(ABA)to delay seed germination.The core ABA signaling pathway and DOG1 pathway converge in protein phosphatase 2C(PP2C).DOG1 requires PP2C to regulate seed dormancy and enhances ABA signa-ling by binding to ABA HYPERSENSITIVE GERMINATION 1/3(AHG1/AHG3).DOG1 suppresses AHG1 acti-vity to increase ABA sensitivity and induce seed dormancy.In recent years,significant progress has been made in research on the regulation of seed dormancy and germination by DOG1.In this review,we summa-rize research achievements in this field,including the role of DOG1 in seed maturation,dormancy,and germi-nation,the transcriptional regulatory mechanisms of DOG1 expression,and the regulation and action mecha-nism of DOG1 on seed dormancy and germination.We also highlight scientific issues that need to be further investigated in this field.
关键词
ABA信号/DOG1调控因子/种子休眠/分子机制/转录因子
Key words
ABA signaling/DOG1 regulator/Seed dormancy/Molecular mechanism/Transcription factors
维普
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