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Coordination of plant growth and Abiotic stress responses by tryptophan synthase β subunit 1 through modulation of tryptophan and ABA homeostasis in Arabidopsis

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Molecular Plant 2022年第6期15卷 973-990页

作者： Wen-Cheng Liu Ru-Feng Song Si-Qiu Zheng Ting-Ting Li Bing-Lei Zhang Xiang Gao Ying-Tang Lu State Key Laboratory of Hybrid Rice College of Life SciencesRenmin Hospital of Wuhan UniversityWuhan UniversityWuhan 430072China State Key Laboratory of Crop stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China

To adapt to changing environments, plants have evolved elaborate regulatory mechanisms balancing their growth with stress responses. It is currently unclear whether and how the tryptophan (Trp), the growth-related hormone auxin, and the stress hormone abscisic acid (ABA) are coordinated in this trade-off. Here, we show that tryptophan synthase β subunit 1 (TSB1) is involved in the coordination of Trp and ABA, thereby affecting plant growth and Abiotic stress responses. Plants experiencing high salinity or drought display reduced TSB1 expression, resulting in decreased Trp and auxin accumulation and thus reduced growth. In comparison with the wild type, amiR-TSB1 lines and TSB1 mutants exhibited repressed growth under non-stress conditions but had enhanced ABA accumulation and stress tolerance when subjected to salt or drought stress. Furthermore, we found that TSB1 interacts with and inhibits β-glucosidase 1 (BG1), which hydrolyses glucose-conjugated ABA into active ABA. Mutation of BG1 in the amiR-TSB1 lines compromised their increased ABA accumulation and enhanced stress tolerance. Moreover, stress-induced H2O2 disrupted the interaction between TSB1 and BG1 by sulfenylating cysteine-308 of TSB1, relieving the TSB1-mediated inhibition of BG1 activity. Taken together, we revealed that TSB1 serves as a key coordinator of plant growth and stress responses by balancing Trp and ABA homeostasis.

关键词： tryptophan auxin growth ABA Abiotic stress TSB1

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The molecular mechanism of plasma membrane H^(+)-ATPases in plant responses to Abiotic stress

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Journal of Genetics and Genomics 2022年第8期49卷 715-725页

作者： Jing Li Yan Guo Yongqing Yang Beijing Advanced Innovation Center for Tree Breeding by Molecular Design College of Bioscience and Resources EnvironmentBeijing University of AgricultureBeijing 102206China State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China

Plasma membrane H^(+)-ATPases(PM H^(+)-ATPases)are critical proton pumps that export protons from the cytoplasm to the apoplast.The resulting proton gradient and difference in electrical potential energize various secondary active transport events.PM H^(+)-ATPases play essential roles in plant growth,development,and stress responses.In this review,we focus on recent studies of the mechanism of PM H^(+)-ATPases in response to Abiotic stresses in plants,such as salt and high pH,temperature,drought,light,macronutrient deficiency,acidic soil and aluminum stress,as well as heavy metal toxicity.Moreover,we discuss remaining outstanding questions about how PM H^(+)-ATPases contribute to Abiotic stress responses.

关键词： PM H^(+)-ATPases Abiotic stress Molecular mechanism

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Strategies and prospects for melatonin to alleviate Abiotic stress in horticultural plants

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Horticultural Plant Journal 2024年第3期10卷 601-614页

作者： Xiaoyun Wang Meng Cao Hongxin Li Ying Liu Shuangxi Fan Na Zhang Yangdong Guo College of Horticulture China Agricultural UniversityBeijing100193China College of Plant Science and Technology Beijing University of AgricultureBeijing102206China Beijing Bei Nong Enterprise Management Co. Ltd.Beijing102206China Sanya Institute of China Agricultural University SanyaHainan572000China

Melatonin is a conserved pleiotropic molecule in animals and plants.Melatonin is involved in many development processes and stress responses;thus,exploring its function in plants,particularly in horticultural plants,has become a rapidly developing field.Many studies have revealed that phytomelatonin acts as a plant biostimulant and increase its tolerance to various Abiotic stressors,including extreme temperature,drought,osmotic disturbance,heavy metals,and ultraviolet(UV).Melatonin appears to have roles in the scavenging of reactive oxygen species(ROS)and other free radicals,affecting the primary and secondary metabolism of plants,regulating the transcripts of stress-related enzymes and transcription factors,and crosstalk with other hormones under different environmental conditions.This pleiotropy makes phytomelatonin an attractive regulator to improve resistance to Abiotic stress in plants.The recent discovery of the potential phytomelatonin receptor CAND2/PMTR1 and the proposition of putative models related to the phytomelatonin signaling pathways makes phytomelatonin a new plant hormone.Based on relevant studies from our laboratory,this review summarizes the phytomelatonin biosynthetic and metabolic pathways in plants and the latest research progress on phytomelatonin in Abiotic stress of horticultural plants.This study will provide a reference for elucidating the regulatory mechanism of phytomelatonin affecting the resistance to Abiotic stress in plants.

关键词： Abiotic stress Biostimulant Horticultural plants Phytomelatonin

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Defensive Role of Plant Hormones in Advancing Abiotic stress-Resistant Rice Plants

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Rice science 2023年第1期30卷 15-35页

作者： M.Iqbal R.KHAN Sarika KUMARI Faroza NAZIR Risheek Rahul KHANNA Ravi GUPTA Himanshu CHHILLAR Department of Botany Jamia HamdardNew Delhi 110062India College of General Education Kookmin UniversitySeoul 136702South Korea

Consistent climatic perturbations have increased global environmental concerns, especially the impacts of Abiotic stresses on crop productivity. Rice is a staple food crop for the majority of the world’s population. Abiotic stresses, including salt, drought, heat, cold and heavy metals, are potential inhibitors of rice growth and yield. Abiotic stresses elicit various acclimation responses that facilitate in stress mitigation. Plant hormones play an important role in mediating the growth and development of rice plants under optimal and stressful environments by activating a multitude of signalling cascades to elicit the rice plant’s adaptive responses. The current review describes the role of plant hormone-mediated Abiotic stress tolerance in rice, potential crosstalk between plant hormones involved in rice Abiotic stress tolerance and significant advancements in biotechnological initiatives including genetic engineering approach to provide a step forward in making rice resistance to Abiotic stress.

关键词： Abiotic stress genetic engineering plant hormone rice transcription factor tolerance

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Nitrogen in plants:from nutrition to the modulation of Abiotic stress adaptation

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stress Biology 2022年第1期2卷 647-660页

作者： Jia Yuan Ye Wen Hao Tian Chong Wei Jin State Key Laboratory of Plant Physiology and Biochemistry College of Natural Resources and Environmental ScienceZhejiang UniversityHangzhou 310058China State Key Laboratory of Rice Biology China National Rice Research InstituteZhejiang 310006HangzhouChina

Nitrogen is one of the most important nutrient for plant growth and development;it is strongly associated with a variety of Abiotic stress responses.As sessile organisms,plants have evolved to develop efficient strategies to manage N to support growth when exposed to a diverse range of stressors.This review summarizes the recent progress in the field of plant nitrate(NO3-)and ammonium(NH4+)uptake,which are the two major forms of N that are absorbed by plants.We explore the intricate relationship between NO3-/NH4+and Abiotic stress responses in plants,focusing on stresses from nutrient deficiencies,unfavorable pH,ions,and drought.Although many molecular details remain unclear,research has revealed a number of core signaling regulators that are associated with N-mediated Abiotic stress responses.An in-depth understanding and exploration of the molecular processes that underpin the interactions between N and Abiotic stresses is useful in the design of effective strategies to improve crop growth,development,and productivity.

关键词： Nitrate Ammonium Uptake Signaling Abiotic stress

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Regulation of plant responses to biotic and Abiotic stress by receptor-like cytoplasmic kinases

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stress Biology 2022年第1期2卷 383-394页

作者： Xiangxiu Liang Jie Zhang College of Life Sciences South China Agricultural UniversityGuangzhou 510642China State Key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China

As sessile organisms,plants have to cope with environmental change and numerous biotic and Abiotic stress.Upon perceiving environmental cues and stress signals using different types of receptors,plant cells initiate immediate and complicated signaling to regulate cellular processes and respond to stress.Receptor-like cytoplasmic kinases(RLCKs)transduce signals from receptors to cellular components and play roles in diverse biological processes.Recent studies have revealed the hubbing roles of RLCKs in plant responses to biotic stress.Emerging evidence indicates the important regulatory roles of RLCKs in plant responses to Abiotic stress,growth,and development.As a pivot of cellular signaling,the activity and stability of RLCKs are dynamically and tightly controlled.Here,we summarize the current understanding of how RLCKs regulate plant responses to biotic and Abiotic stress.

关键词： Receptor-like cytoplasmic kinase Biotic stress Abiotic stress Plant immunity

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The nuclear export receptor OsXPO1 is required for rice development and involved in Abiotic stress responses

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The Crop Journal 2023年第1期11卷 71-78页

作者： Qiufei Peng Jieyu Qiu Xintong Li Xuezhong Xu Xinxiang Peng Guohui Zhu Guangdong Laboratory for Lingnan Modern Agriculture College of Life SciencesSouth China Agricultural UniversityGuangzhou 510640GuangdongChina Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms Guangzhou 510640GuangdongChina

The transport of proteins to and from the nucleus is necessary for many cellular processes and is one of the ways plants respond to developmental signals and environmental stresses.Nucleocytoplasmic trafficking of proteins is mediated by the nuclear transport receptor(NTR).Although NTR has been extensively studied in humans and Arabidopsis,it has rarely been identified and functionally characterized in rice.In this study,we identified exportin 1 in rice(OsXPO1)as a nuclear export receptor.OsXPO1shares high protein identity with its functional homologs in Arabidopsis and other organisms.OsXPO1localized to both the nucleus and the cytoplasm,directly interacted with the small GTPases OsRAN1and OsRAN2 in the nucleus,and mediated their nuclear export.Loss-of-function osxpo1 mutations were lethal at the seedling stage.Suppression of OsXPO1 expression in RNA interference lines produced multifaceted developmental defects,including arrested growth,premature senescence,abnormal inflorescence,and brown and mouth-opened spikelets.Overexpression of OsXPO1 in rice reduced plant height and seed-setting rate,but increased plant tolerance in response to PEG-mimicked drought stress and salt stress.These results indicate that OsXPO1 is a nuclear export receptor and acts in regulating plant development and Abiotic stress responses.

关键词： Exportin 1 Nucleocytoplasmic transport Plant development Abiotic stress

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Genome-wide identification and characterization of the abiotic-stress-responsive lipoxygenase gene family in diploid woodland strawberry(Fragaria vesca)

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Journal of Integrative Agriculture 2022年第7期21卷 1982-1996页

作者： LI Zhi-qi XIE Qian YAN Jia-hui CHEN Jian-qing CHEN Qing-xi College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China Horticultural Plant Biology and Metabolomics Center of Haixia Institute of Science and Technology Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China

Lipoxygenase(LOXs)is a kind of dioxygenase without heme and iron,which plays an important role in the development and adaptation of many plants to the environment.However,the study of strawberry LOX gene family has not been reported.In this study,14 LOX genes were identified from the diploid woodland strawberry genome.The phylogenetic tree divides the FvLOX gene into two subfamilies:9-LOX and 13-LOX.Gene duplication event analysis showed that whole-genome duplication(WGD)/segmental duplication and dispersed duplication effectively promoted the expansion of strawberry LOX family.QRT-PCR analysis showed that FvLOX genes were expressed in different tissues.Expression profile analysis showed that FvLOX1 and FvLOX8 were up-regulated under low temperature stress,FvLOX3 and FvLOX7 were up-regulated under drought stress,FvLOX6 and FvLOX9 were up-regulated under salt stress,FvLOX2,FvLOX3 and FvLOX6 were up-regulated under salicylic acid(SA)treatment,FvLOX3,FvLOX11 and FvLOX14 were up-regulated under methyl jasmonate(MeJA)treatment,FvLOX4 and FvLOX14 were up-regulated under abscisic acid(ABA)treatment.Promoter analysis showed that FvLOX genes were involved in plant growth and development and stress response.We analyzed and identified the whole genome of strawberry FvLOX family and characterized a variety of FvLOX candidate genes involved in Abiotic stress response.This study laid a theoretical and empirical foundation for the response mechanism of strawberry to Abiotic stress.

关键词： lipoxygenase gene family strawberry Abiotic stress expression pattern cis-acting element

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Advances in the functional study of glutamine synthetase in plant Abiotic stress tolerance response

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The Crop Journal 2022年第4期10卷 917-923页

作者： Huayan Yin Fan Yang Xiaoyan He Xuye Du Ping Mu Wujun Ma College of Agronomy Qingdao Agricultural UniversityQingdao 266109ShandongChina Food Futures Institute and College of Science HealthEngineering and EducationMurdoch UniversityPerthWA 6150A ustralia School of Life Sciences Guizhou Normal UniversityGuiyang 550001GuizhouChina

Plant glutamine synthetase(GS,EC6.***.1.2)catalyzes the synthesis of glutamine from glutamate and ammonium ions and acts as a key enzyme in the nitrogen metabolic pathway in organisms.Nitrogen is an essential element for plant growth and development and plays an important role in crop yield and quality formation.Therefore,GS is crucial in many physiological processes in plants.Currently,nitrogen regulation by GS in plants is well-studied in terms of its effect on plant growth and development.This article reviews the regulatory role of plant GS and its molecular mechanism in mitigating stress injury,such as low or high temperature,salinity,drought and oxidation.The function of plant GS in stress tolerance response is focused.The review aims to provide a reference for the utilization of plant GS in crop stress tolerance breeding.

关键词： Glutamine synthetase Plant Abiotic stress Nitrogen metabolism

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Metabolic signatures of Arabidopsis thaliana Abiotic stress responses elucidate patterns in stress priming,acclimation,and recovery

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stress Biology 2022年第1期2卷 550-565页

作者： Yuan Xu Dana M.Freund Adrian D.Hegeman Jerry D.Cohen Department of Horticultural Science and the Microbial and Plant Genomics Institute University of MinnesotaMNSaint PaulUSA Department of Plant and Microbial Biology University of MinnesotaMNSaint PaulUSA

Temperature,water,and light are three Abiotic stress factors that have major influences on plant growth,development,and reproduction.Plants can be primed by a prior mild stress to enhance their resistance to future stress.We used an untargeted metabolomics approach to examine Arabidopsis thaliana 11-day-old seedling’s Abiotic stress responses including heat(with and without priming),cold(with and without priming),water-deficit and high-light before and after a 2-day-recovery period.Analysis of the physiological phenotypes showed that seedlings with stress treatment resulted in a reduction in fresh weight,hypocotyl and root length but remained viable.Several stress responsive metabolites were identified,confirmed with reference standards,quantified,and clustered.We identified shared and specific stress signatures for cold,heat,water-deficit,and high-light treatments.Central metabolism including amino acid metabolism,sugar metabolism,glycolysis,TCA cycle,GABA shunt,glutathione metabolism,purine metabolism,and urea cycle were found to undergo changes that are fundamentally different,although some shared commonalities in response to different treatments.Large increases in cysteine abundance and decreases in reduced glutathione were observed following multiple stress treatments highlighting the importance of oxidative stress as a general phenomenon in Abiotic stress.Large fold increases in low-turnover amino acids and maltose demonstrate the critical role of protein and starch autolysis in early Abiotic stress responses.

关键词： Abiotic stress Arabidopsis thaliana LC-HRMS Metabolomics Plant stress acclimation Priming Recovery

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