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REVEILLE 7 inhibits the expression of the circadian clock gene EARLY FLOWERING 4 to fine-tune hypocotyl growth in response to warm temperatures

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Journal of Integrative Plant Biology 2022年第7期64卷 1310-1324页

作者： Ying-Ying Tian Wei Li Mei-Jing Wang Jin-Yu Li Seth Jon Davis Jian-Xiang Liu State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou 310027China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Department of Biology University of YorkHeslingtonYorkYO105DDUK

The circadian clock maintains the daily rhythms of plant growth and anticipates predictable ambient temperature *** evening complex(EC),comprising EARLY FLOWERING 3(ELF3),ELF4,and LUX ARRHYTHMO,plays an essential role in suppressing thermoresponsive hypocotyl growth by negatively regulating PHYTOCHROME INTERACTING FACTOR 4(PIF4)activity and its downstream targets in Arabidopsis ***,how EC activity is attenuated by warm temperatures remains ***,we demonstrate that warm temperature-induced REVEILLE7(RVE7)fine-tunes thermoresponsive growth in Arabidopsis by repressing ELF4 ***7 transcript and RVE7 protein levels increased in response to warm *** warm temperature conditions,an rve7 loss-of-function mutant had shorter hypocotyls,while overexpressing RVE7 promoted hypocotyl ***4 accumulation and downstream transcriptional effects were reduced in the rve7 mutant but enhanced in RVE7 overexpression plants under warm ***7 associates with the Evening Element in the ELF4 promoter and directly represses its ***4 is epistatic to RVE7,and overexpressing ELF4 suppressed the phenotype of the RVE7 overexpression line under warm temperature ***,our results identify RVE7 as an important regulator of thermoresponsive growth that functions(in part)by controlling ELF4 transcription,highlighting the importance of ELF4 for thermomorphogenesis in plants.

关键词： Arabidopsis thaliana ELF4 hypocotyl growth RVE7 warm temperature

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Mutation of DELAYED GREENING1 impairs chloroplast RNA editing at elevated ambient temperature in Arabidopsis

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Journal of Genetics and Genomics 2020年第4期47卷 201-212页

作者： Jingliang Sun Yingying Tian Qichao Lian Jian-Xiang Liu State Key Laboratory of Genetic Engineering School of Life SciencesFudan UniversityShanghai200433China State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou310027China

Chloroplasts are important for plant growth and *** editing in chloroplast converts cytidines(Cs)to uridine s(Us)at specific transcript positions and provides a correction mechanism to restore conserved codons or creates start or stop ***,the underlined molecular mechanism is not yet fully unders *** the present study,we identi fied a thermo-sensi tive mutantin leaf color 1(tst1)and found that TSL1 is allelic to DELAYED GREENING 1(DG1).The mis sense mutation of DG1 in tsl1 mutant confers a high temperature sensitivity and impaired chloroplast development at an elevated ambient temperature in *** analysis showed that chloroplast RNA editing at seve ral sites including accD-2568,ndhD-2,and petL-5 is impaired in tsl1 mutant plants grown at an elevated ***1 interacts with MORF2 and other proteins such as DYW1 and DYW2 involved in chloroplast RNA *** vitro RNA electrophoretic mobility shift assay demonstrated that DG1 binds to RNA targets such as accD,ndhD,and ***,our results revealed that DG1 is important for maintaining chloroplast mRNA editing in Arabidopsis.

关键词： Chloroplast development mRNA editing warm temperature

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PIFs‑and COP1‑HY5‑mediated temperature signaling in higher plants

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Stress Biology 2022年第1期2卷 270-283页

作者： Yeting Bian Li Chu Huan Lin Yaoyao Qi Zheng Fang Dongqing Xu State Key Laboratory of Crop Genetics and Germplasm Enhancement National Center for Soybean ImprovementCollege of AgricultureNanjing Agricultural UniversityNanjing 210095China

Plants have to cope with the surrounding changing environmental stimuli to optimize their physiological and devel-opmental response throughout their entire life *** and temperature are two critical environmental cues that fluctuate greatly during day-night cycles and seasonal *** two external signals coordinately control the plant growth and *** spectrum of light signals are perceived by a group of wavelength-specific photoreceptors in *** and COP1-HY5 are two predominant signaling hubs that control the expression of a large number of light-responsive genes and subsequent light-mediated development in *** parallel,plants also transmit low or warm temperature signals to these two regulatory modules that precisely modulate the responsive-ness of low or warm *** core component of circadian clock ELF3 integrates signals from light and warm temperatures to regulate physiological and developmental processes in *** this review,we summarize and discuss recent advances and progresses on PIFs-,COP1-HY5-and ELF3-mediated light,low or warm temperature signaling,and highlight emerging insights regarding the interactions between light and low or warm temperature signal transduction pathways in the control of plant growth.

关键词： Light signaling Low temperature warm temperature phyB PIFs COP1 HY5 ELF3

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CCaP1/CCaP2/CCaP3 interact with plasma membrane H^(+)-ATPases and promote thermoresponsive growth by regulating cell wall modification in Arabidopsis

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Plant Communications 2024年第7期5卷 90-105页

作者： Jing-Jing Wang Juan Gao Wei Li Jian-Xiang Liu State Key Laboratory of Plant Environmental Resilience College of Life SciencesZhejiang UniversityHangzhou 310027China College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310027China

Arabidopsis plants adapt to warm temperatures by promoting hypocotyl growth primarily through the basic helix-loop-helix transcription factor PIF4 and its downstream genes involved in auxin responses,which enhance cell *** the current study,we discovered that cell wall-related calcium-binding protein 2(CCaP2)and its paralogs CCaP1 and CCaP3 function as positive regulators of thermo-responsive hypocotyl growth by promoting cell elongation in ***,mutations in CCaP1/CCaP2/CCaP3 do not affect the expression of PIF4-regulated classic downstream ***,they do noticeably reduce the expression of xyloglucan endotransglucosylase/hydrolase genes,which are involved in cell wall *** also found that CCaP1/CCaP2/CCaP3 are predominantly localized to the plasma membrane,where they interact with the plasma membrane H^(+)-ATPases AHA1/***,we observed that vanadate-sensitive H^(+)-ATPase activity and cell wall pectin and hemicellulose contents are significantly increased in wild-type plants grown at warm temperatures compared with those grown at normal growth temperatures,but these changes are not evident in the ccap1-1 ccap2-1 ccap3-1 triple ***,our findings demonstrate that CCaP1/CCaP2/CCaP3 play an important role in controlling thermo-responsive hypocotyl growth and provide new insights into the alternative pathway regulating hypocotyl growth at warm temperatures through cell wall modification mediated by CCaP1/CCaP2/CCaP3.

关键词： AHA1/AHA2 CCaP1/CCaP2/CCaP3 cell wall modification hypocotyl growth thermomorphogenesis warm temperature

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