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How do plants response to stress?
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To cope with environmental stresses, plants often adopt a memory response (similar to the memory of human) upon primary stress exposure to facilitate a quicker and stronger reaction to recurring stresses. Light, a prevailing environmental factor, plays important roles in various processes during plant development and stress response. Whether light could also regulate stress-induced transcriptional memory, however, is not clear.

In this study, Prof HUA Xuejun’s group and the cooperator Prof Jin Jingbo at Institute of Botany, Chinese Academy of Sciences (CAS) shows that light signal is positively involved in salt-induced transcriptional memory of P5CS1 and subsequent proline accumulation. HY5-dependent light signaling is required for the maintenance of salt-induced H3K4me3 in P5CS1 during the recovery stage. This mechanism is likely operating during other stress as well, and could shed light on future research into the concerted effects of different environmental factors on plant response to stresses.

These results were recently online published on the PNAS (www.pnas.org/xxxxxxx). The PhD student FENG Xuanjun of HUA’s group is the first author of the paper. This work was supported by National Natural Science Foundation of China (Grant 31271308); Ministry of Science and Technology of the People’s Republic of China (Grant 2012CB114302); and Chinese Academy of Sciences (Grant XDA08010105).


Figure: The working model of how light regulates the salt stress-induced transcriptional memory of P5CS1.




Prof. HUA Xuejun

Key Laboratory of Plant Resources

Institute of Botany,

Chinese Academy of Sciences,

20 Nanxincun, Xiangshan, Beijing 100093, China

E-mail: xjhua@ibcas.ac.cn

Institute of Botany, CAS    Add: No.20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6215    Fax: +86 10 6259 0833    E-mail: Int_Office@ibcas.ac.cn