AT-hook基因及其在植物开花调控中的研究进展  

AT-hook Genes and Their Role in the Regulation of Flowering in Plants:A Review

作　　者：李津璇 郭敏[1] 王加峰[1] 杨瑰丽[1] Li Jinxuan;Guo Min;Wang Jiafeng;Yang Guili(National Engineering Research Center of Plant Space Breeding,South China Agricultural University,Guangzhou 510642)

机构地区：[1]华南农业大学国家植物航天育种工程技术研究中心,广州510642

出　　处：《中国农学通报》2021年第27期77-81,共5页Chinese Agricultural Science Bulletin

基　　金：广东省自然科学基金“AT-hook基因OsATH1调控水稻开花的分子机理研究”(2018A0303130340)。

摘　　要：AT-hook基因是能够编码与双链DNA小沟中富含AT碱基的序列特异性结合的一类基因,其所编码的蛋白含有以甘氨酸-精氨酸-脯氨酸(GRP)三个氨基酸残基为中心的DNA结合蛋白基序。笔者通过对AT-hook基因的特点和功能及其在拟南芥及水稻等高等植物开花中的调控作用综述。AT-hook基因不仅参与植物的生长发育及逆境胁迫与激素信号应答,同时在花器官的形成以及植物开花中也起着重要的调控作用。该基因在花器官组织中的表达量最高,影响成花素基因的表达,且其编码蛋白能够通过改变染色质状态或招募蛋白复合体在表观水平上调控植物开花相关基因的转录,从而影响植物开花。该基因可能为植物开花的表观遗传调控提供了新的途径。AT-hook gene is a kind of genes that encode the proteins specifically binding to the sequence rich in AT bases in DNA minor groove. The encoded protein contains DNA binding protein motif centered on three amino acid residues of glycine-arginine-proline(GRP). In this paper, the characteristics and functions of AThook genes and their regulatory roles in flowering in Arabidopsis and rice were reviewed. AT-hook genes are not only involved in plant growth and development, stress and hormone signaling responses, but also play an important regulatory role in the formation of flower organs and the flowering of plants. The expression level of this gene is the highest in flower tissues, which affects the expression of the florin genes, and its encoding protein can regulate the transcription of genes related to flowering at the epigenetic level by changing chromatin status or recruiting protein complex, thus affecting the flowering of plants. AT-hook gene may provide a new perspective for epigenetic regulation of plant flowering.

关 键 词：AT-hook基因 水稻 拟南芥 发育调控 开花调控 

分 类 号：S-3[农业科学]