摘要
LBD基因是最近在高等植物中发现的为植物所特有的一类新的基因,含有保守的LOB(lateralor-ganboundaries)结构域。研究发现拟南芥和水稻中的LBD基因均为一大的基因家族,LBD基因参与了侧生器官原基的启动、侧生器官的形态建成以及侧生器官与茎尖分生组织(SAM,shootapicalmeristem)之间边界的建立,并与茎尖分生组织中特异表达的部分基因或基因家族间存在相互作用的关系,对高等植物地上部、地下部的特定器官的形成与发育具有重要影响。本文对LBD基因的结构域特征、在单/双子叶模式植物中的分类、表达特点、已克隆LBD基因的功能及与其它基因或基因家族间的相互作用关系进行了综述,并对LBD基因在高等植物中的功能冗余特性、LOB结构域可能所具有的基本功能和LBD基因与其它基因相互作用的分子机制进行了探讨。
LBD genes define a novel type of plant-specific genes with a LOB domain （lateral organ boundaries domain）, and some members of which have been identified recently. Some researches have revealed that the LBD genes ofA rabidopsis or rice were belonged to a large gene family, and had important effects on the development of up-ground or under-ground certain organs, such as involved in the initiation of lateral organs primordium, formation of lateral organs, establishment of boundaries between SAM （shoot apical meristem） and lateral organs, and interacted with some genes or gene families expressed specially in the SAM, and so on. In this article, the domain structure of LBD genes, classes of LBD genes in model plants of monocotyledon or dicot, expression model, muta- tion phenotypes from loss of function or gain of function, and its relationship to other gene families were reviewed. Furthermore, the redundancy character of LBD genes, basic candidate function shared by LOB domain, and potential molecular mechanism of LBD genes interacting with other genes also were discussed.
出处
《分子植物育种》
CAS
CSCD
2006年第3期301-308,共8页
Molecular Plant Breeding
基金
张启发院士主持的863国家重大专项“功能基因组和植物芯片”项目资助
