Triose phosphate export from chloroplasts and cellular sugar content regulate anthocyanin biosynthesis during high light acclimation
作者机构：University of RostockInstitute for BiosciencesPhysiology of Plant MetabolismAlbert-Einstein-Strasse 318059 RostockGermany Humboldt-Universit€at zu BerlinInstitute of BiologyPhysiology of Plant Cell OrganellesPhilippstrasse 1310115 BerlinGermany Ludwig-Maximilians-Universit€at M€unchenFaculty of BiologyPlant Evolutionary Cell Biology82152 Planegg-MartinsriedGermany
出 版 物：《Plant Communications》 (植物通讯（英文）)
年 卷 期：2023年第4卷第1期
页 面：42-61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 a grant from the German Research Foundation(DFG)to A.S.R.(TRR175,project C06) supported by the DFG(TRR175,D03)
主 题：flavonoid biosynthesis acclimation sugar signaling high light anthocyanin SnRK1
摘 要：Plants have evolvedmultiple strategies to cope with rapid changes in the *** high light(HL)acclimation,the biosynthesis of photoprotective flavonoids,such as anthocyanins,is ***,the exact nature of the signal and downstreamfactors forHL induction of flavonoid biosynthesis(FB)is still under ***,we show that carbon fixation in chloroplasts,subsequent export of photosynthates by triose phosphate/phosphate translocator(TPT),and rapid increase in cellular sugar content permit the transcriptional and metabolic activation of anthocyanin biosynthesis during HL *** combination with genetic and physiological analysis,targeted and whole-transcriptome gene expression studies suggest that reactive oxygen species and phytohormones play only a minor role in rapid HL induction of the anthocyanin branch of *** addition to transcripts of FB,sugar-responsive genes showed delayed repression or induction in tpt-2 during HL treatment,and a significant overlapwith transcripts regulated by SNF1-related protein kinase 1(SnRK1)was observed,including a central transcription factor of *** of mutants with increased and repressed SnRK1 activity suggests that sugar-induced inactivation of SnRK1 is required for HL-mediated activation of anthocyanin *** study emphasizes the central role of chloroplasts as sensors for environmental changes as well as the vital function of sugar signaling in plant acclimation.
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