B类MADS-Box基因的系统发育与功能演化

陈磊, 翟笑雨, 徐启江*
东北林业大学生命科学学院, 林木遗传育种国家重点实验室, 哈尔滨150040

通信作者:徐启江;E-mail: qijiangxu@126.com;Tel: 0451-82191783

摘 要:

B类MADS-box基因是调控被子植物花器官发育ABC分子遗传模型中重要的功能基因。在被子植物系统发育史中发生了2次重要的基因复增事件, 一是在被子植物起源之前通过重复产生APETALA3PISTILLATA家系, 二是在被子植物出现之后在核心双子叶植物中出现的TM6和euAP3家系。B类基因主要调控花瓣和雄蕊的发育, 但是, 也在某些物种花器官的第1轮(萼片)和第4轮(心皮)中表达, 引起花器官的同源异型转换。B类基因的建立受同源/非同源基因的影响。本文对被子植物B类MADS-box基因的系统发育与功能演化及建立进行综述, 探讨了B类MADS-box基因在调控被子植物花部性状的发育和属性决定中的作用机制。

关键词:被子植物; B类MADS-box基因; 系统发育; 功能演化; 功能建立

收稿:2015-04-20   修定:2015-07-30

资助:中央高校基本科研业务费专项资金项目(2572014EA03-01)、国家基础科学人才培养基金(J1210053)和林木遗传育种国家重点实验室(东北林业大学)创新项目(2013B010)。

The Phylogeny and Functional Evolution of B-Class MADS-Box Genes

CHEN Lei, ZHAI Xiao-Yu, XU Qi-Jiang*
The State Key Laboratory of Tree Genetics and Breeding, College of Life Sciences, Northeast Forestry University, Harbin 150040, China

Corresponding author: XU Qi-Jiang; E-mail: qijiangxu@126.com; Tel: 0451-82191783

Abstract:

The B-class MADS-box gene is a kind of vital functional gene of the “ABC” model. The evolution of B-class genes runs through the entire plants evolutional history. There are two critical points among B-class genes evolutionary history. One makes up the APETALA3 and PISTILLATA genes by replicating before the origin of angiosperm. The other produces the TM6 and euAP3 genes in core dicot after angiosperm emerges. In plant groups, B-class genes mainly affect development in the second and third whorl floral organs namely the formation of petal and stamen, while they sometimes express in the first whorl (sepal) and fourth whorl (carpel) forming some petaloid organs to exercise relevant function among some species. Moreover, the expression of B-class is influenced by homologous/non-homologous genes. This review summarizes the phylogeny, functional evolution and establishment of B-class MADS-box gene in angiosperm. This review will assist in following angiosperm B-class MADS-box genes research.

Key words: angiosperm; B-class MADS-box gene; phylogeny; functional evolution; functional establishment

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