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独脚金内酯合成路径及抗逆性研究进展
安奕霖,尹克林
0
(西南大学园艺园林学院)
摘要:
独脚金内酯(strigolactone,SL)是一类萜内酯,来源于类胡萝卜素生物合成途径,是通过一系列的酶促反应合成的。但关于独脚金内酯的生物合成路径尚未研究透彻,目前已经了解到D27蛋白、CCD7 以及 CCD8 蛋白、P450 蛋白在这一过程中起不可忽视的作用。现在,已从豌豆、水稻、矮牵牛、拟南芥等多分枝突变体中克隆得到多个与SL合成、传导途径相关的基因。其中,D27、CCD7 和CCD8负责独脚金内酯合成的上游途径,经过双加氧和脱氢,最后在MAX1的作用下生成了5-脱氧独脚金醇。独脚金内酯是一类新型激素,能够诱导根寄生植物种子萌发并且加快丛枝真菌出现分支,有着阻碍植物分枝生长的作用,从而抵御各种年胁迫,对植物的生长具有重要意义。
关键词:  独角金内酯  合成途径  生物学功能
DOI:
投稿时间:2019-01-24修订日期:2019-01-24
基金项目:
The Research Progress of Strigolactones’ Synthesis Pathway and Resistance
,Yin Ke-lin
()
Abstract:
Strigolactones (SLs) are terpenoid lactone, which came from carotenoid biosynthetic pathway, completed by a series of enzymatic reactions. The SLs biosynthesis was still not unclear, but, research found that D27,CCD7,CCD8 and P450 proteins play a important role. Nowadays, some genes related to SLs biosynthesis and signaling pathways were cloned from high-tillering mutants from different plant species such as rice, arabidopsis, petunia and pea. D27, CCD7 and CCD8 are responsible for the upstream pathway, after double oxygenation and dehydrogenation, MAX1 begins to generate 5-deoxystrigol, finally. As a new type of plant hormone, SLs can inhibit plant branching, induce seed germination of root parasitism, and stimulate hyphal branching in arbuscular mycorrhizal fungi (AMF), having an ability to resist different kinds of stresses, which is of great significance to the growth of plants.
Key words:  Strigolactones  Synthesis pathway  Biological function

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