Plastid-nucleus communication involves calcium-modulated MAPK signalling

Article Article scientifique Article Plastid-nucleus communication involves calcium-modulated MAPK signalling eng 2016-07-11 2016-07-11 author Guo Hailong 0000-0003-2794-9534 author Feng Peiqiang author Chi Wei author Sun Xuwu author Xu Xiumei author Lin Yuan 411504 author Ren Dongtao author Lu Congming author David Rochaix Jean author Leister Dario 0000-0003-1897-8421 author Zhang Lixin 0000-0003-0268-6774 936960 10.1038/ncomms12173 27399341 2041-1723 PMC4942575 https://www.nature.com/articles/ncomms12173 Chloroplast retrograde signals play important roles in coordinating the plastid and nuclear gene expression and are critical for proper chloroplast biogenesis and for maintaining optimal chloroplast functions in response to environmental changes in plants. Until now, the signals and the mechanisms for retrograde signalling remain poorly understood. Here we identify factors that allow the nucleus to perceive stress conditions in the chloroplast and to respond accordingly by inducing or repressing specific nuclear genes encoding plastid proteins. We show that ABI4, which is known to repress the LHCB genes during retrograde signalling, is activated through phosphorylation by the MAP kinases MPK3/MPK6 and the activity of these kinases is regulated through 14-3-3ω-mediated Ca 2+ -dependent scaffolding depending on the chloroplast calcium sensor protein CAS. These findings uncover an additional mechanism in which chloroplast-modulated Ca 2+ signalling controls the MAPK pathway for the activation of critical components of the retrograde signalling chain. Dewey 580 45 Département des sciences végétales 163 false Nature communications 7 1 fa02b80b-2ea8-4e55-a62a-2f0f1316e0ec Article (Published version) Public Article_scientifique_from_unpaywall.pdf 2182577 application/pdf CC BY-4.0 5e7e88d458203d05756064d9e90743c37356fbf6250e65ac7f871cc9c1129249 openAccess Faculté des sciences / Section de biologie / Département des sciences végétales

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Plastid-nucleus communication involves calcium-modulated MAPK signalling	Nature communications			2016	54	33

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Zhang, Lixin