Differential leaf flooding resilience in Arabidopsis thaliana is controlled by ethylene signalingactivated and age-dependent phosphorylation of ORESARA1

作     者：Tom Rankenberg Hans van Veen Mastoureh Sedaghatmehr Che-Yang Liao Muthanna Biddanda Devaiah Evelien AStouten Salma Balazadeh Rashmi Sasidharan 

作者机构：Plant Stress ResilienceUtrecht UniversityPadualaan 83584 CH Utrechtthe Netherlands Evolutionary Plant-EcophysiologyGroningen Institute for Evolutionary LIfe SciencesNijenborgh 79747 AG Groningenthe Netherlands Max Planck Institute of Molecular Plant PhysiologyAm Muhlenberg 114476 PotsdamGermany Experimental and Computational Plant DevelopmentUtrecht UniversityPadualaan 83584 CH Utrechtthe Netherlands Leiden UniversityLeidenthe Netherlands 

出 版 物：《Plant Communications》 (植物通讯（英文）)

年 卷 期：2024年第5卷第6期

页      面：73-88页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 

基　　金：supported by the Netherlands Organization for Scientific Research grant 016.VIDI.171.006 to T.R 

主　　题：flooding abiotic stress hypoxia senescence ethylene 

摘      要：The phytohormone ethylene is a major regulator of plant adaptive responses to *** flooded plant tissues,ethylene quickly increases to high concentrations owing to its low solubility and diffusion rates in *** accumulation in submerged plant tissues makes it a reliable cue for triggering flood acclimation responses,including metabolic adjustments to cope with flood-induced ***,persistent ethylene accumulation also accelerates leaf ***-induced senescence hampers photosynthetic capacity and stress *** submerged Arabidopsis,senescence follows a strict age-dependent pattern starting with the older *** mechanisms underlying ethylene-mediated senescence have been uncovered,it is unclear how submerged plants avoid indiscriminate breakdown of leaves despite high systemic ethylene *** demonstrate that although submergence triggers leaf-age-independent activation of ethylene signaling viaEIN3 in Arabidopsis,senescence is initiated only inold ***3 stabilization also leads to overall transcript and protein accumulation of the senescence-promoting transcription factor ORESARA1(ORE1)in both old and young leaves during ***,leaf-age-dependent senescence can be explained by ORE1 protein activation via phosphorylation specifically in old leaves,independent of the previously identifiedage-dependentcontrol of ORE1 viami R164.A systematic analysis of the roles of the majorflooding stresscuesand signalingpathways shows that only the combination of ethylene and darkness is sufficientto mimic submergence-induced senescence involving ORE1 accumulation and ***,most of ten associated with flooding stress in plants,appears to have no role in these *** results reveal a mechanism by which plants regulate the speed and pattern of senescence during environmental stresses such as ***-dependent ORE1 activity ensures that older,expendable leaves are dismantled firs