植物赤霉素受体GID1基因的分析
2021-07-16唐文芳徐升胜龙雯虹
唐文芳 徐升胜 龙雯虹



摘要 从NCBI数据库在线网站搜集了赤霉素受体基因核苷酸序列,分析了所获基因的进化关系。结果表明,植物的98个GID1基因拥有共同的根系,进化为Group A、Group B、 Group C和 Group D 4组。Group A GID1基因在单子叶植物纲中没有GID1a、GID1b、GID1c分类现象,在双子叶植物纲中基因有简单的Group B GID1b,Group C GID1a,且GID1c聚类现象;Group D由被子植物门单子叶植物和双子叶植物及苔藓植物门小立苔藓植物的基因组成;GID1基因组在进化过程中可能出现复制突变,所有GID1基因具有相同的保守区域,可利用基因之间的保守性来克隆未知基因;102条序列归属于91种植物,尚有更多单子叶植物、裸子植物和蕨类植物的GID1基因有待克隆。
关键词 赤霉素;GID1基因;系统发育重建
中图分类号 Q-943.2 文献标识码 A 文章编号 0517-6611(2021)12-0098-05
doi:10.3969/j.issn.0517-6611.2021.12.025
开放科学(资源服务)标识码(OSID):
Analysis of Gibberellin Receptor GID1 Gene in Plants
TANG Wen fang, XU Sheng sheng, LONG Wen hong
(Yunnan Agricultural University, Kunming, Yunnan 650201)
Abstract The nucleotide sequence of gibberellin receptor gene was collected from the NCBI database online website, and the evolutionary relationship of the obtained gene was analyzed. The results showed that 98 GID1 genes in plants had the same root system, which evolved into four groups: Group A, Group B, Group C and Group D. Group A GID1 gene has no classification phenomenon of GID1a, GID1b and GID1c in monocotyledons. In dicotyledons, there are simple Group B GID1b, Group C GID1a and GID1c clustering phenomenon. Group D is composed of GID1 genes of Monocotyledoneae and Dicotyledoneae of the Angiospermae and Bryophyta Bryopsida of the plants. This suggests that the GID1 genome is replicating during the evolutionary process. All GID1 genes share the same conserved region, which can be used to clone unknown genes. Phylogenetic analysis of 102 GID1 genes of 91 plant species shows that more GID1 genes of monocotyledons, gymnosperms and ferns need to be cloned.
Key words Gibberellin;GID 1 genes;Phylogenetic reconstruction
赤霉素(gibberellins,GAs)是重要的植物激素之一,它參与植物生长发育的过程,包括种子萌发、茎叶的发育、花及果实的发育等[1-2]。有研究表明,赤霉素促进植物生长发育的作用较其他四大激素大,促进作用不会发生超最适浓度的抑制作用[3]。赤霉素通过生物合成和信号转导途径来影响植物生长发育,增加细胞的伸长,提高生物量,促进果实发育。信号转导途径,使植物产生赤霉素效应[4]。该过程必须通过赤霉素信号通路来实现,目前已发现130余种赤霉素类物质,但仅有少数几种具有生物活性,分别为GA1、GA3、GA4和GA7,主要用来调控植物生长发育的是GA3和GA7的混合物,它们的调控作用通过与Gibberellin Insensitive Dwarf 1(GID1)结合的亲和度来反映[5]。赤霉素受体GID1不论在蛋白水解途径还是非蛋白水解途径中都有特殊功能[4],每个受体基因在不同蛋白水解途径中对植物种子发芽、根茎叶的生长及繁殖起着不同的作用[3,6]。……
