Kong Doudou, Becker Annette
Institute of Botany, Justus-Liebig-University, Heinrich-Buff-Ring 38, 35392 Gießen, Germany.
Plants (Basel). 2021 Jun 3;10(6):1140. doi: 10.3390/plants10061140.
Floral meristems are dynamic systems that generate floral organ primordia at their flanks and, in most species, terminate while giving rise to the gynoecium primordia. However, we find species with floral meristems that generate additional ring meristems repeatedly throughout angiosperm history. Ring meristems produce only stamen primordia, resulting in polystemous flowers (having stamen numbers more than double that of petals or sepals), and act independently of the floral meristem activity. Most of our knowledge on floral meristem regulation is derived from molecular genetic studies of , a species with a fixed number of floral organs and, as such of only limited value for understanding ring meristem function, regulation, and ecological value. This review provides an overview of the main molecular players regulating floral meristem activity in and summarizes our knowledge of ring primordia morphology and occurrence in dicots. Our work provides a first step toward understanding the significance and molecular genetics of ring meristem regulation and evolution.
花分生组织是动态系统，在其侧面产生花器官原基，并且在大多数物种中，在产生雌蕊原基时终止。然而，我们发现有一些物种的花分生组织在整个被子植物历史中反复产生额外的环状分生组织。环状分生组织仅产生雄蕊原基，导致多雄蕊花（雄蕊数量比花瓣或萼片数量的两倍还多），并且其活动独立于花分生组织。我们关于花分生组织调控的大部分知识来自于对一种花器官数量固定的物种的分子遗传学研究，因此对于理解环状分生组织的功能、调控和生态价值的价值有限。本综述概述了调控花分生组织活动的主要分子因素，并总结了我们对双子叶植物中环状原基形态和出现情况的了解。我们的工作为理解环状分生组织调控和进化的意义及分子遗传学迈出了第一步。
