Age-triggered and dark-induced leaf senescence require the bHLH transcription factors PIF3, 4, and 5.

Age-triggered and dark-induced leaf senescence require the bHLH transcription factors PIF3, 4, and 5.
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年龄触发和黑暗诱导的叶子衰老需要 bHLH 转录因子 PIF3、4 和 5

DOI:
10.1093/mp/ssu109
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发表时间:
2014-12
期刊:
影响因子:
27.5
通讯作者:
Kuai B
Kuai B
中科院分区:
生物学1区
文献类型:
--
作者:
Song Y;Yang C;Gao S;Zhang W;Li L;Kuai B

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大量的证据表明光敏色素参与了植物叶片衰老的调控,但其相关的信号通路和生理机制尚不清楚。在这项研究中,我们证明了PIF3,4和5,光信号的主调节器,调节年龄触发和黑暗诱导的衰老,特别是PIF4正调控叶片衰老,直接靶向相关基因的叶绿素降解和叶绿体活性维持以及乙烯生物合成。
SUMMARY Numerous lines of evidence have suggested an involvement of phytochromes in the regulation of leaf senescence, but the related signaling pathway and physiological mechanisms are poorly understood. In this study, we demonstrated that PIF3, 4, and 5, the master regulators of light signaling, modulate age-triggered and dark-induced senescence and particularly PIF4 positively regulates leaf senescence by directly targeting genes related to chlorophyll degradation and chloroplast activity maintaining as well as ethylene biosynthesis.
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