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Guihaia Aug. 2020ꎬ 40(8): 1169-1180
DOI: 10.11931/ guihaia.gxzw201902021
陈俊洁ꎬ 梅松ꎬ 胡彦如. 脱落酸激素诱导拟南芥幼苗中花青素的合成 [J]. 广西植物ꎬ 2020ꎬ 40(8): 1169-1180.
CHEN JJꎬ MEI Sꎬ HU YR. Abscisic acid induces anthocyanin synthesis in Arabidopsis thaliana seedlings [J]. Guihaiaꎬ 2020ꎬ 40(8): 1169-1180.
脱落酸激素诱导拟南芥幼苗中花青素的合成
陈俊洁 1ꎬ2 ꎬ 梅 松 ꎬ 胡彦如 1∗
1
( 1. 热带植物资源可持续利用重点实验室ꎬ 中国科学院西双版纳热带植物园ꎬ 昆明 650223ꎻ 2. 中国科学院大学ꎬ 北京 100049 )
摘 要: 脱落酸(abscisic acidꎬABA)激素是一类重要的生长调节物质ꎬ参与调控植物的多种生理过程ꎮ 花
青素(anthocyanins)是植物次生代谢产生的类黄酮化合物ꎬ对植物的生长发育和逆境胁迫响应有重要作用ꎮ
该文以拟南芥(Arabidopsis thaliana)为研究对象ꎬ探讨 ABA 信号对花青素生物合成的调控功能和作用机制ꎮ
结果表明:外源施加 ABA 显著提高野生型幼苗茎尖中花青素的积累ꎮ 相一致的是ꎬABA 能诱导某些与花青
素合成相关的转录因子及合成酶基因的表达ꎮ 遗传学分析发现ꎬABA 诱导花青素合成部分依赖于 MBW 复
合体中的核心转录因子ꎬ如 TTG1、TT8 及 MYB75 等ꎮ 初步机制研究揭示ꎬABA 信号途径中的 bZIP 类转录
因子 ABI5 能与 TTG1、TT8 及 MYB75 等相互作用形成蛋白复合物ꎮ 综上结果认为ꎬABA 信号诱导拟南芥幼
苗中花青素的积累ꎬ并可能通过 ABI5 与 MBW 复合体协同作用调控花青素的合成ꎮ
关键词: 拟南芥ꎬ 脱落酸ꎬ 花青素ꎬ ABI5 转录因子ꎬ MBW 复合体
中图分类号: Q943 文献标识码: A
文章编号: 1000 ̄3142(2020)08 ̄1169 ̄12 开放科学(资源服务)标识码(OSID):
Abscisic acid induces anthocyanin synthesis
in Arabidopsis thaliana seedlings
1ꎬ 2 1 1∗
CHEN Junjie ꎬ MEI Song ꎬ HU Yanru
( 1. CAS Key Laboratory of Tropical Plant Resources and Sustainable Useꎬ Xishuangbanna Tropical Botanical Gardenꎬ Chinese Academy
of Sciencesꎬ Kunming 650223ꎬ Chinaꎻ 2. University of Chinese Academy of Sciencesꎬ Beijing 100049ꎬ China )
Abstract: Abscisic acid ( ABA) is a critical phytohormone and widely modulates various biological processes in
plants. Anthocyanins are flavonoids produced by plant secondary metabolism and play crucial roles in plant growth and
stress responses. Recentlyꎬ several transcription factors and synthetase genes involved in anthocyanins biosynthesis have
been well studiedꎻ howeverꎬ the upstream regulatory signals mediating their synthesis remain to be further explored. In
this studyꎬ we taken Arabidopsis thaliana as the research object and investigated the function and mechanism of ABA in
the control of anthocyanin biosynthesis. Phenotypic analysis showed that exogenous application of ABA significantly in ̄
creased the accumulation of anthocyanins in the stem ends of wild ̄type A. thaliana seedlings. Consistentlyꎬ ABA induced
the expression of certain transcription factors and synthetase genes associated with anthocyanin synthesis. In additionꎬ ge ̄
收稿日期: 2019-05-07
基金项目: 国家自然科学基金(31670281)[Supported by the National Natural Science Foundation of China 31670281) ]ꎮ
作者简介: 陈俊洁(1995-)ꎬ女ꎬ云南昭通镇雄人ꎬ硕士ꎬ研究方向为植物激素信号转导ꎬ(E ̄mail) chenjunjie@ xtbg.ac.cnꎮ
∗
通信作者: 胡彦如ꎬ博士ꎬ研究员ꎬ研究方向为植物激素信号转导ꎬ(E ̄mail) huyanru@ xtbg.ac.cnꎮ