Analysis of the physiological roles and mode of actions of phthalimides as GA signal regulator in rice

Analysis of the physiological roles and mode of actions of phthalimides as GA signal regulator in rice
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邻苯二甲酰亚胺类水稻GA信号调节剂的生理作用及作用方式分析

DOI:
10.1007/s00344-022-10733-y
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发表时间:
2022-08
期刊:
Springer Nature
影响因子:
--
通讯作者:
Tadao Asami
Tadao Asami
中科院分区:
其他
文献类型:
--
作者:
Kai Jiang;Jianwen Wang;Shinsaku Ito;Ikuo Takahashi;Tsuyoshi Ohta;Kohji Murase;Masatoshi Nakajima;Hongwei Guo;Seiji Takayama;Tadao Asami

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N-取代邻苯二甲酰亚胺(AC 94377)在多种植物中具有模拟赤霉素(GA)的活性,并被证明是拟南芥GA受体GID 1的选择性激动剂,表明其具有开发新型GA信号调节剂的潜力。在此,我们证实了AC 94377在水稻中的GA样活性,包括促进第二叶鞘生长和抑制根中独脚金内酯分泌物。我们进行了化学和遗传操作水稻GA受体GID 1和邻苯二甲酰亚胺之间的相互作用。我们的研究结果表明,AC 94377的羧酰胺部分的修饰可以互换不同的GID 1亚型的偏好。综上所述,我们的研究结果证实了AC 94377作为GID 1激动剂的普遍作用,以及基于AC 94377的支架结合GID 1操纵在作物中设计新型GA激动剂甚至拮抗剂的潜力,其可用于根寄生杂草控制。
An N-substituted phthalimide, AC94377, was reported to mimic gibberellin (GA) activity in various plants, and was demonstrated to be a selective agonist for GA receptor GID1 in Arabidopsis, suggesting its potentiality for developing novel GA signal regulators. Here, we confirmed the GA-like activity of AC94377 in rice, including promotion on 2nd leaf sheath growth and suppression on strigolactone exudates from roots. We performed chemical and genetic manipulation of interaction between rice GA receptor GID1 and phthalimides. Our results showed that modifications of carboxamide moiety of AC94377 can interchange the preference for different GID1-subtype. To summary, our findings confirmed universal roles of AC94377 as a GID1 agonist, and the potentiality of designing novel GA agonist or even antagonist based on the scaffold of AC94377 coupled with GID1 manipulations in crops, which could be used for root parasitic weed control.
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