文章基本信息

标题：A stress recovery signaling network for enhanced flooding tolerance in Arabidopsis thaliana
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作者：Elaine Yeung ; Hans van Veen ; Divya Vashisht 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2018
卷号：115
期号：26
页码：E6085-E6094
DOI：10.1073/pnas.1803841115
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Abiotic stresses in plants are often transient, and the recovery phase following stress removal is critical. Flooding, a major abiotic stress that negatively impacts plant biodiversity and agriculture, is a sequential stress where tolerance is strongly dependent on viability underwater and during the postflooding period. Here we show that in Arabidopsis thaliana accessions (Bay-0 and Lp2-6), different rates of submergence recovery correlate with submergence tolerance and fecundity. A genome-wide assessment of ribosome-associated transcripts in Bay-0 and Lp2-6 revealed a signaling network regulating recovery processes. Differential recovery between the accessions was related to the activity of three genes: RESPIRATORY BURST OXIDASE HOMOLOG D , SENESCENCE-ASSOCIATED GENE113 , and ORESARA1 , which function in a regulatory network involving a reactive oxygen species (ROS) burst upon desubmergence and the hormones abscisic acid and ethylene. This regulatory module controls ROS homeostasis, stomatal aperture, and chlorophyll degradation during submergence recovery. This work uncovers a signaling network that regulates recovery processes following flooding to hasten the return to prestress homeostasis.
关键词：flooding ; ribosome footprinting ; reactive oxygen species ; dehydration ; recovery