A Two-Step Model for de Novo Activation of WUSCHEL during Plant Shoot Regeneration
A Two-Step Model for de Novo Activation of WUSCHEL during Plant Shoot Regeneration
复制标题
植物芽再生过程中 WUSCHEL 从头激活的两步模型
DOI:
10.1105/tpc.16.00863
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发表时间:
2017-04
期刊:
影响因子:
11.6
通讯作者:
Wang Jia Wei
中科院分区:
文献类型:
--
作者:
Zhang Tian Qi;Lian Heng;Zhou Chuan Miao;Xu Lin;Jiao Yuling;Wang Jia Wei
The removal of repressive histone marks in a cytokinin-rich environment primes de novo activation of WUSCHEL by B-type ARABIDOPSIS RESPONSE REGULATORs and HD-ZIP III transcription factors. Plant cells are totipotent and competent to regenerate from differentiated organs. It has been known for six decades that cytokinin-rich medium induces shoot regeneration from callus cells. However, the underlying molecular mechanism remains elusive. The homeodomain transcription factor WUSCHEL (WUS) is essential for de novo establishment of the shoot stem cell niche in Arabidopsis thaliana. We found that WUS-positive (WUS+) cells mark the shoot progenitor region during regeneration. A cytokinin-rich environment initially promotes the removal of the repressive histone mark H3K27me3 at the WUS locus in a cell cycle-dependent manner. Subsequently, the B-type ARABIDOPSIS RESPONSE REGULATORs (ARRs) ARR1, ARR2, ARR10, and ARR12, which function as transcriptional activators in the cytokinin signaling pathway, spatially activate WUS expression through binding with microRNA165/6-targeted HD-ZIP III transcription factors. Thus, our results provide important insights into the molecular framework for cytokinin-directed shoot regeneration and reveal a two-step mechanism for de novo activation of WUS.
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影响因子:
4.5
作者:
Shi B;Zhang C;Tian C;Wang J;Wang Q;Xu T;Xu Y;Ohno C;Sablowski R;Heisler MG;Theres K;Wang Y;Jiao Y
通讯作者:
Jiao Y
影响因子:
11.6
作者:
Ying Wang;Jin Wang;Bihai Shi;Ting Yu;Jiyan Qi;E. Meyerowitz;Yuling Jiao
通讯作者:
Ying Wang;Jin Wang;Bihai Shi;Ting Yu;Jiyan Qi;E. Meyerowitz;Yuling Jiao
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
R. K. Yadav;Mariano Perales;J. Gruel
通讯作者:
R. K. Yadav;Mariano Perales;J. Gruel
影响因子:
64.8
作者:
Crevillen, Pedro;Yang, Hongchun;Cui, Xia;Greeff, Christiaan;Trick, Martin;Qiu, Qi;Cao, Xiaofeng;Dean, Caroline
通讯作者:
Dean, Caroline
影响因子:
4.6
作者:
Chanvivattana, Y;Bishopp, A;Goodrich, J
通讯作者:
Goodrich, J