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Type-B response regulator OsRR22 forms a transcriptional activation complex with OsSLR1 to modulate OsHKT2;1 expression in rice

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Science China(Life Sciences) 2023年第12期66卷 2922-2934页

作者： Yutong Liu Xiaoyuan Peng Ao Ma Wenxin Liu Bao Liu dae-jin yun Zheng-Yi Xu Key Laboratory of Molecular Epigenetics of the Ministry of Education(MOE) Northeast Normal UniversityChangchun 130024China Department of Biomedical Science and Engineering Konkuk UniversitySeoul 05029Republic of Korea

Soil salinity severely limits crop yields and *** have evolved several strategies to mitigate the adverse effects of salinity,including redistribution and compartmentalization of toxic ions using ion-specific ***,the mechanisms underlying the regulation of these ion transporters have not been fully ***-of-function mutants of OsHKT2;1,which is involved in sodium uptake,exhibit strong salt stress-resistant *** this study,OsHKT2;1 was identified as a transcriptional target of the type-B response regulator ***-of-function osrr22 mutants showed resilience to salt stress,and OsRR22-overexpression plants were sensitive to salt ***22 was found to activate the expression of OsHKT2;1 by directly binding to the promoter region of OsHKT2;1 via a consensus cis-element of type-B response ***,rice DELLA protein OsSLR1 directly interacted with OsRR22 and functioned as a transcriptional *** study has uncovered a novel transcriptional regulatory mechanism by which a type-B response regulator controls sodium transport under salinity stress.

关键词： Oryza sativa type-B response regulator transcriptional regulation sodium transport

Plasma membrane-localized Hsp40/DNAJ chaperone protein facilitates OsSUVH7-OsBAG4-OsMYB106 transcriptional complex formation for Os HKT1;5 activation

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Journal of Integrative Plant Biology 2023年第1期65卷 265-279页

作者： Yutong Liu Mengting Li jinlei Yu Ao Ma Jie Wang dae-jin yun Zheng-Yi Xu Key Laboratory of Molecular Epigenetics of the Ministry of Education(MOE)Northeast Normal University Changchun 130024 China Department of Biomedical Science and Engineering Konkuk University Seoul South Korea

The salinization of irrigated land affects agricultural ***-AFFINITY POTASSIUM(K+)TRANSPORTER 1;5(OsHKT1;5)-dependent sodium(Na+)transport is a key salt tolerance mechanism during rice growth and *** a previously generated high-throughput activation tagging-based T-DNA insertion mutant pool,we isolated a mutant exhibiting salt stress-sensitive phenotype,caused by a reduction in OsHKT1;*** salt stress-sensitive phenotype of this mutant results from the loss of function of OsDNAJ15,which encodes plasma membranelocalized heat shock protein 40(Hsp40).osdnaj15loss-of-function mutants show decreased plant height,increased leaf angle,and reduced grain number caused by shorter panicle length and fewer *** the other háand,OsDNAJ15-overexpression plants showed salt stress-tolerant ***,salt stress facilitates the nuclear relocation of OsDNAJ15 so that it can interact with OsBAG4,and OsDNAJ15 and OsBAG4synergistically facilitate the DNA-binding activity of OsMYB106 to positively regulate the expression of OsHKT1;***,our results reveal a novel function of plasma membrane-localized Hsp40protein in modulating,alongside chaperon regulator OsBAG4,transcriptional regulation under salinity stress tolerance.

关键词： chaperon regulator Oryza sativa small heat shock protein sodium transport transcriptional regulation

HEXOKINASE1 forms a nuclear complex with the PRC2 subunits CURLY LEAF and SWINGER to regulate glucose signaling

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Journal of Integrative Plant Biology 2022年第6期64卷 1168-1180页

作者： Yutong Liu yunshu Bai Ning Li Mengting Li Wenxin Liu dae-jin yun Bao Liu Zheng-Yi Xu Key Laboratory of Molecular Epigenetics of the Ministry of Education(MOE) Northeast Normal UniversityChangchun 130024China Department of Biomedical Science and Engineering Konkuk UniversitySeoul 132‐798South Korea

The glucose sensor HEXOKINASE1(HXK1)integrates myriad external and internal signals to regulate gene expression and development in Arabidopsis ***,how HXK1 mediates glucose signaling in the nucleus remains ***,using immunoprecipitationcoupled mass spectrometry,we show that two catalytic subunits of Polycomb Repressive Complex 2,SWINGER(SWN)and CURLY LEAF(CLF),directly interact with catalytically active HXK1 and its inactive forms(HXK1^(G104D) and HXK1^(S177A))via their evolutionarily conserved SANT ***1,CLF,and SWN target common glucose-responsive genes to regulate glucose signaling,as revealed by RNA *** glucose-insensitive phenotypes of the Arabidopsis swn-1 and clf-50 mutants were similar to that of hxk1,and genetic analysis revealed that CLF,SWN,and HXK1 function in the same genetic ***,HXK1 is required for CLF-and SWN-mediated histone H3 lysine 27(H3K27me3)deposition and glucose-mediated gene ***,CLF and SWN affect the recruitment of HXK1 to its target *** findings support a model in which HXK1 and epigenetic modifiers form a nuclear complex to cooperatively mediate glucose signaling,thereby affecting the histone modification and expression of glucoseregulated genes in plants.

关键词： Arabidopsis thaliana glucose sensor hexokinase histone methylation transcriptional regulation

HOS15 represses flowering by promoting GIGANTEA degradation in response to low temperature in Arabidopsis

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Plant Communications 2023年第4期4卷 225-239页

作者： Gyeongik Ahn Hee jin Park Song Yi Jeong Gyeong-Im Shin Myung Geun Ji Joon-yung Cha Jeongsik Kim Min Gab Kim dae-jin yun Woe-Yeon Kim Research Institute of Life Science Institute of Agricultural and Life ScienceGyeongsang National UniversityJinju 52828Republic of Korea Division of Applied Life Science(BK21 Four) Plant Biological Rhythm Research CenterPlant Molecular Biology and Biotechnology Research CenterGraduate School of Gyeongsang National UniversityJinju 52828Republic of Korea Department of Biological Sciences College of Natural SciencesChonnam National UniversityGwangju 61186Republic of Korea Faculty of Science Education and Interdisciplinary Graduate Program in Advanced Convergence Technology and Science Jeju National UniversityJeju 63243Republic of Korea College of Pharmacy and Research Institute of Pharmaceutical Science PMBBRCGyeongsang National UniversityJinju 52828Republic of Korea Institute of Glocal Disease Control Konkuk UniversitySeoul 05029Republic of Korea Key Laboratory of Molecular Epigenetics of the Ministry of Education(MOE) Northeast Normal UniversityChangchun 130024China

Flowering is the primary stage of the plant developmental transition and is tightly regulated by environmental factors such as light and ***,the mechanisms by which temperature signals are integrated into the photoperiodic flowering pathway are still poorly ***,we demonstrate that HOS15,which is known as a GI transcriptional repressor in the photoperiodic flowering pathway,controls flowering time in response to low ambient *** 16℃,the hos15 mutant exhibits an early flowering phenotype,and HOS15 acts upstream of photoperiodic flowering genes(GI,CO,and FT).GI protein abundance is increased in the hos15 mutant and is insensitive to the proteasome inhibitor ***,the hos15 mutant has a defect in low ambient temperature-mediated GI degradation,and HOS15 interacts with COP1,an E3 ubiquitin ligase for GI *** analyses of the hos15 cop1 double mutant revealed that repression of flowering by HOS15 is dependent on COP1 at 16℃.However,the HOS15-COP1 interaction was attenuated at 16℃,and GI protein abundance was additively increased in the hos15 cop1 double mutant,indicating that HOS15 acts independently of COP1 in GI turnover at low ambient *** study proposes that HOS15 controls GI abundance through multiple modes as an E3 ubiquitin ligase and transcriptional repressor to coordinate appropriate flowering time in response to ambient environmental conditions such as temperature and day length.

关键词： Arabidopsis flowering response low ambient temperature HOS15 GIGANTEA

Sodium Stress in the Halophyte Thellungiella halophila and Transcriptional Changes in a thsos1-RNA Interference Line

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Journal of Integrative Plant Biology 2007年第10期49卷 1484-1496页

作者： Dong-Ha Oh Qingqiu Gong Alex Ulanov Quan Zhang Youzhi Li Wenying Ma dae-jin yun Ray A. Bressan Hans J. Bohnert Division of Applied Life Science (BK21 Program) and Environmental Biotechnology National Core Research Center Graduate School of Gyeongsang National University jinju 660-701 Korea Departments of Plant Biology and of Crop Sciences University of Illinois at Urbana-Champaign Urbana IL 61801 USA Key Laboratory of Plant Stress Research College of Life Science Shandong Normal University jinan 250014 China Key Laboratory of the Ministry of Education for Microbial and Plant Genetic Engineering Guangxi University Nanning 530005 China Department of Horticulture and Landscape Architecture Purdue University West-Lafayette IN 47907 USA

The plasma membrane Na＋/H＋-antiporter salt overly sensitive1 （SOS1） from the halophytic Arabidopsis-relative Thellungiella halophila （ThSOS1） shows conserved sequence and domain structure with the orthologous genes from Arabidopsis thaliana and other plants. When expression of ThSOSt was reduced by RNA interference （RNAi）, pronounced characteristics of salt-sensitivity were observed. We were interested in monitoring altered transcriptional responses between Thellungiella wild type and thsost-4, a representative RNAi line with particular emphasis on root responses to salt stress at 350 mmol/L NaCI, a concentration that is only moderately stressful for mature wild type plants. Transcript profiling revealed several functional categories of genes that were differently affected in wild-type and RNAi plants. Down-regulation of SOS1 resulted in different gene expression even in the absence of stress. The pattern of gene induction in the RNAi plant under salt stress was similar to that of glycophytic Arabidopsis rather than that of wild type Thellungiella. The RNAi plants failed to down-regulate functions that are normally reduced in wild type Thellungiella upon stress and did not up-regulate functions that characterize the Thellungiella salt stress response. Metabolite changes observed in wild type Thellungiella after salt stress were less pronounced or absent in RNAi plants. Transcript and metabolite behavior suggested SOS1 functions including but also extending its established function as a sodium transporter. The down-regulation of ThSOS1 converted the halophyte Thellungiella into a salt-sensitive plant.

关键词： salt stress salt overly sensitive1 RNA interference Thellungiella halophila transcript profiling.

Calcium and Calmodulin-Mediated Regulation of Gene Expression in Plants

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Molecular Plant 2009年第1期2卷 13-21页

作者： Min Chul Kim Woo Sik Chung dae-jin yun Moo Je Cho Division of Applied Life Science (BK21 Program) Plant Molecular Biology and Biotechnology Research Center and Environmental Biotechnology National Core Research Center Gyeongsang National University Jinju 660-701 Korea

Sessile plants have developed a very delicate system to sense diverse kinds of endogenous developmental cues and exogenous environmental stimuli by using a simple Ca^2＋ ion. Calmodulin （CAM） is the predominant Ca^2＋ sensor and plays a crucial role in decoding the Ca^2＋ signatures into proper cellular responses in various cellular compartments in eukaryotes. A growing body of evidence points to the importance of Ca^2＋ and CaM in the regulation of the transcriptional process during plant responses to endogenous and exogenous stimuli. Here, we review recent progress in the identification of transcriptional regulators modulated by Ca^2＋ and CaM and in the assessment of their functional significance during plant signal transduction in response to biotic and abiotic stresses and developmental cues.

关键词： Abiotic/environmental stress calcium signaling/transport gene expression.

Redox sensor QSOX1 regulates plant immunity by targeting GSNOR to modulate ROS generation

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Molecular Plant 2021年第8期14卷 1312-1327页

作者： Ho Byoung Chae Min Gab Kim Chang Ho Kang Joung Hun Park Eun Seon Lee Sang-Uk Lee Yong Hun Chi Seol Ki Paeng Su Bin Bae Seong Dong Wi Byung-Wook yun Woe-Yeon Kim dae-jin yun David Mackey Sang Yeol Lee Division of Applied Life Sciences(BK21)and PMBBRC Gyeongsang National UniversityJinju 52828Korea College of Pharmacy Research Institute of Pharmaceutical ScienceGyeongsang National UniversityJinju 52828Korea School of Applied Biosciences College of Agriculture and Life SciencesKyungpook National UniversityDaegu 41566Korea Department of Biomedical Science and Engineering Konkuk UniversitySeoul 05029Korea Department of Horticulture and Crop Science Department of Molecular Geneticsand Center for Applied Plant SciencesThe Ohio State UniversityColumbusOH 43210USA College of Life Sciences Qingdao Agricultural UniversityQingdao 266109P.R.China Plant Propagation Team Plant Production DivisionSejong National ArboretumSejong 30106Korea

Reactive oxygen signaling regulates numerous biological processes,including stress responses in *** sensors transduce reactive oxygen signals into cellular ***,we present biochemical evidence that a plant quiescin sulfhydryl oxidase homolog(QSOX1)is a redox sensor that negatively regulates plant immunity against a bacterial *** expression level of QSOX1 is inversely correlated with pathogen-induced reactive oxygen species(ROS)***,QSOX1 both senses and regulates ROS levels by interactingn with and mediating redox regulation of S-nitrosoglutathione reductase,which,consistent with previous findings,influences reactive nitrogen-mediated regulation of ROS ***,our data indicate that QSOX1 is a redox sensorthat negatively regulates plant immunity by linking reactive oxygen and reactive nitrogen signaling to limit ROS production.

关键词： redox sensor plant immu nity QSOX1 GSNOR reactive oxygen species(ROS) reactive nitrogen species(RNS)

Overexpression of Arabidopsis YUCCA6 in Potato Results in High-Auxin Developmental Phenotypes and Enhanced Resistance to Water Deficit

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Molecular Plant 2013年第2期6卷 337-349页

作者： Jeong Im Kim Dongwon Baek Hyeong Cheol Park Hyun jin Chun Dong-Ha Oh Min Kyung Lee Joon-yung Cha Woe-Yeon Kim Min Chul Kim Woo Sik Chung Hans J. Bohner Sang Yeol Lee Ray A. Bressan Shin-Woo Lee dae-jin yun Department of Biochemistry Purdue University West Lafayette IN 47907 USA Division of Applied Life Science (BK21 and WCU Program) Plant Molecular Biology and Biotechnology Research Center Gyeongsang National UniversityJinju 660-701 Republic of Korea Department of Plant Biology University of Illinois at Urbana-Champaign Urbana IL USA Department of Agronomy and Medicinal Plant Resources Gyeongnam National University of Science and Technology Jinju 660-758 Korea Faculty of Science King Abdulaziz University Jeddah 21589 KSA Department of Horticulture Purdue University West Lafayette IN 47907 USA

Indole-3-acetic acid （IAA）, a major plant auxin, is produced in both tryptophan-dependent and tryptophan-independent pathways. A major pathway in Arabidopsis thaliana generates IAA in two reactions from tryptophan. Step one converts tryptophan to indole-3-pyruvic acid （IPA） by tryptophan aminotransferases followed by a rate-limiting step converting IPA to IAA catalyzed by YUCCA proteins. We identified eight putative StYUC （Solanum tuberosum YUCCA） genes whose deduced amino acid sequences share 50%-70% identity with those of Arabidopsis YUCCA proteins. All include canonical, conserved YUCCA sequences： FATGY motif, FMO signature sequence, and FAD-binding and NADP-binding sequences. In addition, five genes were found with -50% amino acid sequence identity to Arabidopsis trypto-phan aminotransferases. Transgenic potato （Solanum tuberosum cv. Jowon） constitutively overexpressing Arabidopsis AtYUC6 displayed high-auxin phenotypes such as narrow downward-curled leaves, increased height, erect stature, and longevity. Transgenic potato plants overexpressing AtYUC6 showed enhanced drought tolerance based on reduced water loss. The phenotype was correlated with reduced levels of reactive oxygen species in leaves. The results suggest a func-tional YUCCA pathway of auxin biosynthesis in potato that may be exploited to alter plant responses to the environment.

关键词： Solanum tuberosum potato Arabidopsis thaliana yuc6-1D YUCCA, StYUCCA, StTAA, auxin, drought.

Rheostatic Control of ABA Signaling through HOS15-Mediated OST1 Degradation

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Molecular Plant 2019年第11期12卷 1447-1462页

作者： Akhtar Ali Jae Kyoung Kim Masood Jan Haris Ali Khan Irfan Ullah Khan Mingzhe Shen Junghoon Park Chae jin Lim Shah Hussain Dongwon Baek Kai Wang Woo Sik Chung Vicente Rubio Sang Yeol Lee Zhizhong Gong Woe Yeon Kim Ray ABressan Jose MPardo dae-jin yun Department of Biomedical Science&Engineering Konkuk UniversitySeoul 05029South Korea Department of Mathematical Sciences Korea Advanced Institute of Science and TechnologyDaejeon 34131Korea Division of Applied Life Science Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinju 660-701South Korea State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Centro Nacional de Biotecnologia-CSIC Darwin 3.Campus de la UAM.Cantoblanco28049 MadridSpain Department of Horticulture and Landscape Architecture Purdue University625 Agriculture Mall DriveWest LafayetteIN 47907-2010USA lnstituto de Bioquimica Vegetal y Fotosintesis cicCartujaCSIC-Universidad de SevillaAmericoVespucio 49Sevilla 41092Spain

Dehydrating stresses trigger the accumulation of abscisic acid(ABA),a key plant stress-signaling hormone that activates Snf1-Related Kinases(SnRK2s)to mount adaptive ***,the regulatory circuits that terminate the SnRK2s signal relay after acclimation or post-stress conditions remain to be ***,we show that the desensitization of the ABA signal is achieved by the regulation of OST1(SnRK2.6)protein stability via the E3-ubiquitin ligase *** ABA signal,HOS15-induced degradation of OST1 is inhibited and stabilized OST1 promotes the stress *** the ABA signal terminates,protein phosphatases ABI1/2 promote rapid degradation of OST1 via ***,we found that even in the presence of ABA,OST1 levels are also depleted within hours of ABA signal *** unexpected dynamics of OST1 abundance are then resolved by systematic mathematical modeling,demonstrating a desensitizing feedback loop by which OST1-induced upregulation of ABI1/2 leads to the degradation of *** model illustrates the complex rheostat dynamics underlying the ABA-induced stress response and desensitization.

关键词： ABA signaling drought stress HOS15 OST1 ABI1/2 protein degradation and stability