种子休眠与萌发调控的研究进展
Research progress of seed dormancy and germination regulation
宋松泉 1唐翠芳 2雷华平 3姜孝成 4王伟青 5程红焱5
作者信息
- 1. 中国科学院植物研究所,北京 100093;湘南学院南岭现代种业研究院,湖南郴州 423099
- 2. 湖南师范大学生命科学学院,湖南长沙 410081;湘南学院南岭现代种业研究院,湖南郴州 423099
- 3. 湘南学院南岭现代种业研究院,湖南郴州 423099
- 4. 湖南师范大学生命科学学院,湖南长沙 410081
- 5. 中国科学院植物研究所,北京 100093
- 折叠
摘要
休眠使植物种子能够为萌发安排时间,直到环境条件变得有利于幼苗的存活与生长.种子的休眠特性具有重要的生态适应性意义和显著的农业价值.植物激素脱落酸(ABA)和赤霉素(GA)是种子休眠与萌发的关键因素,处于休眠状态的成熟种子含有高水平的ABA和低水平的GA;ABA诱导和维持种子休眠,而GA拮抗ABA的作用和促进种子萌发.萌发延迟-1(DOG1)是种子休眠的主要调控因子,与ABA协同作用延迟萌发.DOG1 通过与PP2C ABA过敏感萌发(AHG1/AHG3)结合以增强ABA的信号转导,以及抑制AHG1的作用以增加ABA的敏感性和强加种子休眠.印记基因在受精前后受到表观遗传机制的调控,与种子休眠的建立与释放密切相关.近年来,种子休眠的调控研究取得了显著的进展.本文综述了植物激素ABA和GA对种子休眠与萌发的控制,DOG1 调控种子休眠的作用机制,以及种子休眠与萌发的表观遗传调控,并提出了在本领域需要进一步研究的科学问题,以期为深入理解种子休眠与萌发的分子机制、抗穗萌发育种以及促进休眠种子的萌发提供参考.
Abstract
Dormancy enables plant seeds to time germination until environmental conditions become favorable for seedling survival and growth.The dormancy characteristics of seeds are of important ecological adaptive significance and notable agricultural value.Phytohormone abscisic acid(ABA)and gibberellin(GA)are the key factors for seed dormancy and germination.Mature seeds in dormancy state contain high levels of ABA and low levels of GA.ABA induces and maintains seed dormancy,while GA antagonizes ABA and promotes seed germination.DELAY OF GERMINATION-1(DOG1)is a major regulator of seed dormancy and had a syn-ergistic effect with ABA to delay germination.DOG1 enhances ABA signal transduction by combining with PP2C ABA hypersensi-tive germination(AHG1/AHG3),and inhibits the action of AHG1 to increase ABA sensitivity and impose seed dormancy.Imprinted genes are regulated by epigenetic mechanisms before and after fertilization,and are closely related to the establishment and release of seed dormancy.In recent years,remarkable progress has been made in the regulation of seed dormancy.In the present paper,we re-viewed the effects of phytohormones ABA and GA on seed dormancy and germination,the action mechanism regulating seed dor-mancy by DOG1,and the epigenetic regulation of seed dormancy and germination.In addition,we also propose some scientific issues that need to be further investigated in this field to provide some information for understanding the molecular mechanism of seed dor-mancy and germination,breeding in anti-preharvest sprouting in crop plants,and promoting the germination of dormant seeds.
关键词
DOG1/表观遗传/分子机制/植物激素/种子休眠Key words
DOG1/epigenetic/molecular mechanism/phytohormone/seed dormancy引用本文复制引用
基金项目
国家科技支撑计划项目(2012BAC01B05)
郴州国家可持续发展议程创新示范区建设省级专项(2022sfq06)
郴州市人民政府和湘南学院人才项目()
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据