花发育：AGL6亚家族MADS盒基因的进化史与功能

Flower development: the evolutionary history and functions of the AGL6 subfamily MADS-box genes.

作者信息

Dreni Ludovico, Zhang Dabing

机构信息

Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University (SJTU)-University of Adelaide Joint Centre for Agriculture and Health, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China

出版信息

J Exp Bot. 2016 Mar;67(6):1625-38. doi: 10.1093/jxb/erw046.

DOI:10.1093/jxb/erw046

PMID:26956504

Abstract

AGL6 is an ancient subfamily of MADS-box genes found in both gymnosperms and angiosperms. Its functions remained elusive despite the fact that the MADS-box genes and the ABC model have been studied for >20 years. Nevertheless, recent discoveries in petunia, rice, and maize support its involvement in the 'E' function of floral development, very similar to the closely related AGL2 (SEPALLATA) subfamily which has been well characterized. The known functions of AGL6 span from ancient conserved roles to new functions acquired in specific plant families. The AGL6 genes are involved in floral meristem regulation, in floral organs, and ovule (integument) and seed development, and have possible roles in both male and female germline and gametophyte development. In grasses, they are also important for the development of the first whorl of the flower, whereas in Arabidopsis they may play additional roles before floral meristem formation. This review covers these recent insights and some other aspects that are not yet fully elucidated, which deserve more studies in the future.

摘要

AGL6是在裸子植物和被子植物中均发现的MADS-box基因的一个古老亚家族。尽管MADS-box基因和ABC模型已经被研究了20多年，但其功能仍然不清楚。然而，最近在矮牵牛、水稻和玉米中的发现支持其参与花发育的“E”功能，这与已被充分表征的密切相关的AGL2（SEPALLATA）亚家族非常相似。AGL6的已知功能涵盖从古老的保守作用到特定植物家族中获得的新功能。AGL6基因参与花分生组织调控、花器官、胚珠（珠被）和种子发育，并且在雄性和雌性生殖系及配子体发育中可能发挥作用。在禾本科植物中，它们对花的第一轮发育也很重要，而在拟南芥中，它们可能在花分生组织形成之前发挥额外作用。本综述涵盖了这些最新见解以及一些尚未完全阐明的其他方面，这些方面在未来值得更多研究。