A molecular framework of light-controlled phytohormone action in Arabidopsis.
A molecular framework of light-controlled phytohormone action in Arabidopsis.
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拟南芥光控植物激素作用的分子框架。
DOI:
10.1016/j.cub.2012.06.039
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发表时间:
2012-08-21
期刊:
影响因子:
9.2
通讯作者:
Guo, Hongwei
中科院分区:
文献类型:
--
作者:
Zhong, Shangwei;Shi, Hui;Xue, Chang;Wang, Lei;Xi, Yanpeng;Li, Jigang;Quail, Peter H.;Deng, Xing Wang;Guo, Hongwei
The changing environments strongly affect plants growth and development. Phytohormones, endogenous plant-made small molecules such as ethylene, regulate a wide range of processes throughout the lifetime of plants. The ability of plants to integrate external signals with endogenous regulatory pathways is vital for their survival. Ethylene was found to suppress hypocotyl elongation in darkness, while promote it in light. How ethylene regulates hypocotyl elongation in such an opposite way is largely unknown. In particular, how light modulates and even reverses the function of ethylene has yet to be characterized. Here we show that the bHLH transcription factor Phytochrome-Interacting Factor 3 (PIF3), is directly activated by Ethylene-Insensitive 3 (EIN3), and is indispensible for ethylene-induced hypocotyl elongation in light. Ethylene via EIN3 concomitantly activates two contrasting pathways: the PIF3-dependent growth-promoting pathway and an Ethylene-Response Factor 1 (ERF1)-mediated growth-inhibiting pathway. The PIF3 pathway is saturated in dark but progressively fortified with light de-stabilizing PIF proteins to reduce their redundancy. While the ERF1 pathway is mainly functional in dark but gradually saturated with light dramatically stabilizing ERF1 protein. Our findings provide a mechanistic insight into how light modulates internal hormone-regulated plant growth.
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DOI:
10.1073/pnas.0812219106
发表时间:
2009-05-05
影响因子:
11.1
作者:
Shin, Jieun;Kim, Keunhwa;Choi, Giltsu
通讯作者:
Choi, Giltsu
影响因子:
9.2
作者:
Leivar, Pablo;Monte, Elena;Oka, Yoshito;Liu, Tiffany;Carle, Christine;Castillon, Alicia;Huq, Enamul;Quail, Peter H.
通讯作者:
Quail, Peter H.
影响因子:
56.9
作者:
Alonso, JM;Hirayama, T;Ecker, JR
通讯作者:
Ecker, JR
影响因子:
56.9
作者:
ECKER, JR
通讯作者:
ECKER, JR
影响因子:
7.2
作者:
Konishi, Mineko;Yanagisawa, Shuichi
通讯作者:
Yanagisawa, Shuichi