TOR promotes guard cell starch degradation by regulating the activity of β-AMYLASE1 in Arabidopsis

doi:10.1093/plcell/koab307

IB-CAS > 中科院光生物学重点实验室

	TOR promotes guard cell starch degradation by regulating the activity of β-AMYLASE1 in Arabidopsis
	Han, Chao ; Hua, Wenbo ; Li, Jinge 1; Qiao, Yan ; Yao, Lianmei ; Hao, Wei ; Li, Ruizi 2; Fan, Min ; De Jaeger, Geert 3,4; Yang, Wenqiang2 ; Bai, Ming-Yi
	2022
发表期刊	PLANT CELL
ISSN	1040-4651
卷号	34 期号:3 页码:1038-1053
摘要	TOR promotes BAM1 expression through BZR1, and induces BAM1 accumulation by inhibiting the autophagy and proteasome pathways, thereby promoting guard cell starch degradation and stomatal opening. Starch is the main energy storage carbohydrate in plants and serves as an essential carbon storage molecule for plant metabolism and growth under changing environmental conditions. The TARGET of RAPAMYCIN (TOR) kinase is an evolutionarily conserved master regulator that integrates energy, nutrient, hormone, and stress signaling to regulate growth in all eukaryotes. Here, we demonstrate that TOR promotes guard cell starch degradation and induces stomatal opening in Arabidopsis thaliana. Starvation caused by plants growing under short photoperiod or low light photon irradiance, as well as inactivation of TOR, impaired guard cell starch degradation and stomatal opening. Sugar and TOR induce the accumulation of beta-AMYLASE1 (BAM1), which is responsible for starch degradation in guard cells. The plant steroid hormone brassinosteroid and transcription factor BRASSINAZOLE-RESISTANT1 play crucial roles in sugar-promoted expression of BAM1. Furthermore, sugar supply induced BAM1 accumulation, but TOR inactivation led to BAM1 degradation, and the effects of TOR inactivation on BAM1 degradation were abolished by the inhibition of autophagy and proteasome pathways or by phospho-mimicking mutation of BAM1 at serine-31. Such regulation of BAM1 activity by sugar-TOR signaling allows carbon availability to regulate guard cell starch metabolism and stomatal movement, ensuring optimal photosynthesis efficiency of plants.
学科领域	Biochemistry & Molecular Biology ; Plant Sciences ; Cell Biology
DOI	10.1093/plcell/koab307
收录类别	SCI
语种	英语
WOS关键词	STOMATAL CLOSURE ; GROWTH ; METABOLISM ; GLUCOSE ; TARGET ; LIGHT ; NUTRIENT ; HXK1 ; BZR1
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000764265700011
出版者	OXFORD UNIV PRESS INC
文献子类	Article
出版地	CARY
EISSN	1532-298X
资助机构	National Natural Science Foundation of China [31600199, 31670284, 31970306, 31870262] ; Science and Technology Department of Shandong Province [2019LZGC015, ZR2019ZD16]
作者邮箱	baimingyi@sdu.edu.cn
作品OA属性	Green Published, Bronze
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28469
专题	中科院光生物学重点实验室
作者单位	1.Shandong Univ, Sch Life Sci, Minist Educ, Key Lab Plant Dev & Environm Adaptat Biol, Qingdao 266237, Peoples R China 2.Shandong Normal Univ, Coll Life Sci, Shandong Prov Key Lab Plant Stress, Jinan 250014, Peoples R China 3.Chinese Acad Sci, Inst Bot, Key Lab Photobiol, Beijing, Peoples R China 4.Univ Ghent, Dept Plant Biotechnol & Bioinformat, Ghent, Belgium 5.VIB Ctr Plant Syst Biol, Ghent, Belgium
推荐引用方式 GB/T 7714	Han, Chao,Hua, Wenbo,Li, Jinge,et al. TOR promotes guard cell starch degradation by regulating the activity of β-AMYLASE1 in Arabidopsis[J]. PLANT CELL,2022,34(3):1038-1053.
APA	Han, Chao.,Hua, Wenbo.,Li, Jinge.,Qiao, Yan.,Yao, Lianmei.,...&Bai, Ming-Yi.(2022).TOR promotes guard cell starch degradation by regulating the activity of β-AMYLASE1 in Arabidopsis.PLANT CELL,34(3),1038-1053.
MLA	Han, Chao,et al."TOR promotes guard cell starch degradation by regulating the activity of β-AMYLASE1 in Arabidopsis".PLANT CELL 34.3(2022):1038-1053.

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