首页|MdSnRK1.1 interacts with MdGLK1 to regulate abscisic acid-mediated chlorophyll accumulation in apple

MdSnRK1.1 interacts with MdGLK1 to regulate abscisic acid-mediated chlorophyll accumulation in apple

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Abscisic acid(ABA),as a plant hormone,plays a positive role in leaf chlorosis;however,the underlying molecular mechanism is less known.Our findings provide ABA treatment reduced the chlorophyll accumulation in apple,and Malus x domestica Sucrose Non-fermenting 1-Related Protein Kinase 1.1(MdSnRK1.1)participates in the process.MdSnRK1.1 interacts with MdGLK1,a GOLDEN2-like transcription factor that orchestrates development of the chloroplast.Furthermore,MdSnRK1.1 affects MdGLK1 protein stability through phosphorylation.We found that Ser468 of MdGLK1 is target site of MdSnRK1.1 phosphorylation.MdSnRK1.1-mediated phosphorylation was critical for MdGLK1 binding to the target gene MdHEMA1 promoters.Collectively,our results demonstrate that ABA activates MdSnRK1.1 to degrade MdGLK1 and inhibit the accumulation of chlorophyll.These findings extend our understanding on how MdSnRK1.1 balances normal growth and hormone response.

Yu-Ying Yang、Xiu-Hong An、Lin Rui、Guo-Dong Liu、Yi Tian、Chun-Xiang You、Xiao-Fei Wang

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State Key Laboratory of Crop Biology,Apple Technology Innovation Center of Shandong Province,Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production,College of Horticulture Science and Engineering,Shandong Agricultural University,Tai-An 271018,Shandong,China

Key Laboratory of Chinese Herbal Medicine Biology and Cultivation,Ministry of Agriculture and Rural Affairs,Institute of Chinese Herbal Medicine,Hubei Academy of Agricultral Science,Enshi 445000,China

National Engineering Research Center for Agriculture in Northern Mountainous Areas,Agricultural Technology Innovation Center in Mountainous Areas of Hebei Province,Hebei Agricultural University,Baoding 071000,Hebei,China

国家自然科学基金国家自然科学基金国家重点研发计划China Agriculture Research System of MOF and MARATaishan Scholar Foundation of Shandong Province河北省自然科学基金

32172538322726832018YFD1000200CARS-27LJNY202026C2021204134

2024

10.1093/hr/uhad288

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(2)
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