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G protein controls stress readiness by modulating transcriptional and metabolic homeostasis in Arabidopsis thaliana and Marchantia polymorpha

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Molecular Plant 2022年第12期15卷 1889-1907页

作者： Ting-Ying Wu Shalini Krishnamoorthi Kulaporn Boonyaves Isam Al-Darabsah Richalynn Leong Alan M.Jones Kimitsune Ishizaki Kang-Ling Liao Daisuke Urano Temasek Life Sciences Laboratory SingaporeSingapore Department of Mathematics University of ManitobaWinnipegMBCanada Singapore-MIT Alliance for Research and Technology SingaporeSingapore Department of Biological Sciences National University of SingaporeSingapore 117558Singapore Departments of Biology and Pharmacology University of North CarolinaChapel HillNCUSA Graduate School of Science Kobe UniversityKobeHyogo 657-8501Japan

The core G protein signaling module,which consists of Gαand extra-large Gα(XLG)subunits coupled with the Gβγdimer,is a master regulator of various stress *** this study,we compared the basal and salt stress-induced transcriptomic,metabolomic and phenotypic profiles in Gα,Gβ,and XLG-null mutants of two plant species,Arabidopsis thaliana and Marchantia polymorpha,and showed that G protein mediates the shift of transcriptional and metabolic homeostasis to stress readiness *** demonstrated that such stress readiness serves as an intrinsic protection mechanism against further stressors through enhancing the phenylpropanoid pathway and abscisic acid ***,WRKY transcription factors were identified as key intermediates of G protein-mediated homeostatic *** and mathematical model comparisons between *** and *** revealed evolutionary conservation of transcriptional and metabolic networks over land plant evolution,whereas divergence has occurred in the function of plant-specific atypical XLG *** together,our results indicate that the shifts in transcriptional and metabolic homeostasis at least partially act as the mechanisms of G protein-coupled stress responses that are conserved between two distantly related plants.

关键词： homeostatic adjustments transcriptional regulation metabolic regulation heterotrimeric G protein evolutionary conservation

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