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Trade-offs between the accumulation of cuticular wax and jasmonic acid-mediated herbivory resistance in maize

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Journal of Integrative Plant Biology 2024年第1期66卷 143-159页

作者： Jiong Liu Lu Li Zhilong Xiong Christelle AMRobert Baozhu Li Shan He Wenjie Chen Jiasheng Bi Guanqing Zhai Siyi Guo Hui Zhang Jieping Li Shutang Zhou Xi Zhang chun‐peng song School of Life Sciences Henan UniversityKaifeng 475004China State Key Laboratory of Crop Stress Adaptation and Improvement Henan UniversityKaifeng 475004China State Key Laboratory of Cotton Bio‐Breeding and Integrated Utilization Henan UniversityKaifeng 475004China Sanya Institute of Henan University Sanya 572025China Institute of Plant Sciences University of BernBern 3013Switzerland

Plants have evolved complex physical and chemical defense systems that allow them to withstand herbivory infestation.Composed of a complex mixture of very-long-chain fatty acids(VLCFAs)and their derivatives,cuticular wax constitutes the first physical line of defense against herbivores.Here,we report the function of Glossy 8(ZmGL8),which encodes a 3-ketoacyl reductase belonging to the fatty acid elongase complex,in orchestrating wax production and jasmonic acid(JA)-mediated defenses against herbivores in maize(Zea mays).The mutation of GL8 enhanced chemical defenses by activating the JA-dependent pathway.We observed a trade-off between wax accumulation and JA levels across maize glossy mutants and 24 globally collected maize inbred lines.In addition,we demonstrated that mutants defective in cuticular wax biosynthesis in Arabidopsis thaliana and maize exhibit enhanced chemical defenses.Comprehensive transcriptomic and lipidomic analyses indicated that the gl8 mutant confers chemical resistance to herbivores by remodeling VLCFA-related lipid metabolism and subsequent JA biosynthesis and signaling.These results suggest that VLCFA-related lipid metabolism has a critical role in regulating the trade-offs between cuticular wax and JA-mediated chemical defenses.

关键词： cuticular wax fall armyworm herbivore resistance jasmonic acid maize plant-herbivore interactions

Nitric oxide negatively regulates gibberellin signaling to coordinate growth and salt tolerance in Arabidopsis

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Journal of Genetics and Genomics 2022年第8期49卷 756-765页

作者： Lichao Chen Shuhao Sun chun-peng song Jian-Min Zhou Jiayang Li Jianru Zuo State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Crop Stress Adaptation and Improvement Collaborative Innovation Center of Crop Stress BiologyHenan UniversityKaifengHenan 475001China Hainan Yazhou Bay Seed Laboratory SanyaHainan 572025China

In response to dynamically altered environments,plants must finely coordinate the balance between growth and stress responses for their survival.However,the underpinning regulatory mechanisms remain largely elusive.The phytohormone gibberellin promotes growth via a derepression mechanism by proteasomal degradation of the DELLA transcription repressors.Conversely,the stress-induced burst of nitric oxide(NO)enhances stress tolerance,largely relying on NO-mediated S-nitrosylation,a redox-based posttranslational modification.Here,we show that S-nitrosylation of Cys-374 in the Arabidopsis RGA protein,a key member of DELLAs,inhibits its interaction with the F-box protein SLY1,thereby preventing its proteasomal degradation under salinity condition.The accumulation of RGA consequently retards growth but enhances salt tolerance.We propose that NO negatively regulates gibberellin signaling via S-nitrosylation of RGA to coordinate the balance of growth and stress responses when challenged by adverse environments.

关键词： Gibberellin Nitric oxide S-nitrosylation DELLA repressors Stress responses

Phosphorylation of the LCB1 subunit of Arabidopsis serine palmitoyltransferase stimulates its activity and modulates sphingolipid biosynthesis

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Journal of Integrative Plant Biology 2023年第6期65卷 1585-1601页

作者： Yuan Li Hanwei Cao Tingting Dong Xiaoke Wang Liang Ma Kun Li Huiqiang Lou chun-peng song Dongtao Ren State Key Laboratory of Plant Environmental Resilience College of Biological SciencesChina Agricultural UniversityBeijing 100193China State Key Laboratory of Agro-Biotechnology and Beijing Advanced Innovation Center for Food Nutrition and Human Health College of Biological SciencesChina Agricultural UniversityBeijing 100193China Collaborative Innovation Center of Crop Stress Biology Henan Province.Institute of Plant Stress BiologySchool of Life ScienceHenan UniversityKaifeng 475001China

Sphingolipids are the structural components of membrane lipid bilayers and act as signaling molecules in many cellular processes.Serine palmitoyltransferase(SPT)is the first committed and rate-limiting enzyme in the de novo sphingolipids biosynthetic pathway.The core SPT enzyme is a heterodimer consisting of LONG-CHAIN BASE1(LCB1)and LCB2 subunits.SPT activity is inhibited by orosomucoid proteins and stimulated by small subunits of SPT(ssSPTs).However,whether LCB1 is modified and how such modification might regulate SPT activity have to date been unclear.Here,we show that activation of MITOGEN-ACTIVATED PROTEIN KINASE 3(MPK3)and MPK6 by upstream MKK9 and treatment with Flg22(a pathogen-associated molecular pattern)increases SPT activity and induces the accumulation of sphingosine long-chain base t18:0 in Arabidopsis thaliana,with activated MPK3and MPK6 phosphorylating AtLCB1.Phosphorylation of AtLCB1 strengthened its binding with AtLCB2b,promoted its binding with ssSPTs,and stimulated the formation of higher order oligomeric and active SPT complexes.Our findings therefore suggest a novel regulatory mechanism for SPT activity.

关键词： Arabidopsis MAPK phosphorylation sphingolipids

Major episodes of horizontal gene transfer drove the evolution of land plants

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Molecular Plant 2022年第5期15卷 857-871页

作者： Jianchao Ma Shuanghua Wang Xiaojing Zhu Guiling Sun Guanxiao Chang Linhong Li Xiangyang Hu Shouzhou Zhang Yun Zhou chun-peng song Jinling Huang State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Key Laboratory for Plant Diversity and Biogeography of East Asia Yunnan Key Laboratory for Fungal Diversity and Green DevelopmentKunming Institute of BotanyChinese Academy of SciencesKunming 650201China Department of Entomology China Agricultural UniversityBeijing 100193China Shanghai Key Laboratory of Bio-Energy Crops School of Life SciencesShanghai UniversityShanghai 200444China Fairy Lake Botanical Garden Shenzhen&Chinese Academy of SciencesShenzhen 518004China Department of Biology East Carolina UniversityGreenvilleNC 27858USA

How horizontal gene transfer(HGT)has contributed to the evolution of animals and plants remains a major puzzle.Despite recent progress,defining the overall scale and pattern of HGT events in land plants has been largely elusive.In this study,we performed systematic analyses for acquired genes in different plant groups and throughout land plant evolution.We found that relatively recent HGT events occurred in char-ophytes and all major land plant groups,but their frequency declined rapidly in seed plants.Two major ep-isodes of HGT events occurred in land plant evolution,corresponding to the early evolution of strepto-phytes and the origin of land plants,respectively.Importantly,a vast majority of the genes acquired in the two episodes have been retained in descendant groups,affecting numerous activities and processes of land plants.We analyzed some of the acquired genes involved in stress responses,ion and metabolite transport,growth and development,and specialized metabolism,and further assessed the cumulative ef-fects of HGT in land plants.

关键词： plant evolution adaptation streptophytes cumulative effect stress response growth and development

Comprehensive Functional Analysis of the Catalase Gene Family in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2008年第10期50卷 1318-1326页

作者： Yan-Yan Du peng-Cheng Wang Jia Chen chun-peng song State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing 100094 China Laboratory of Plant Stress Biology Department of Biology Henan University Kaifeng 475001 China

In Arabidopsis, catalase （CAT） genes encode a small family of proteins including CAT1, CAT2 and CAT3, which catalyze the decomposition of hydrogen peroxide （H2O2） and play an important role in controlling homeostasis of reactive oxygen species （ROS）. Here, we analyze the expression profiles and activities of three catalases under different treatments including drought, cold, oxidative stresses, abscisic acid and salicylic acid in Arabidopsis. Our results reveal that CAT1 is an important player in the removal of H2O2 generated under various environmental stresses. CAT2 and CAT3 are major H2O2 scavengers that contribute to ROS homeostasis in light or darkness, respectively. In addition, CAT2 is activated by cold and drought stresses and CAT3 is mainly enhanced by abscisic acid and oxidative treatments as well as at the senescence stage. These results, together with previous data, suggest that the network of transcriptional control explains how CATs and other scavenger enzymes such as peroxidase and superoxide dismutase may be coordinately regulated during development, but differentially expressed in response to different stresses for controlling ROS homeostasis.

关键词： catalase isozymes reactive oxygen species stress transcription.

GA Associated Dwarf 5 encodes an ent-kaurenoic acid oxidase required for maize gibberellin biosynthesis and morphogenesis

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The Crop Journal 2023年第6期11卷 1742-1751页

作者： Zuliang Li Baozhu Li Junli Zhang Hongliang Wang Mao Wang Siyi Guo pengtao Wang Zhi Li David WGalbraith Dandan Li chun-peng song State Key Laboratory of Crop Stress Adaptation and Improvement State Key Laboratory of Cotton BiologySchool of Life SciencesHenan UniversityKaifeng 475004HenanChina Sanya Institute of Henan University Sanya 572025HainanChina Academy for Advanced Interdisciplinary Studies Henan UniversityKaifeng 475004HenanChina Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China National Engineering Research Centre for Wheat State Key Laboratory of Wheat and Maize Crop ScienceCollege of AgronomyHenan Agricultural UniversityZhengzhou 450046HenanChina School of Plant Sciences and Bio5 Institute The University of ArizonaTucsonAZ 85721USA China-UK-NYNU-RRes Joint Laboratory of Insect Biology Henan Key Laboratory of Insect Biology in Funiu MountainNanyang Normal UniversityNanyang 473061HenanChina

Gibberellin(GA)functions in plant growth and development.However,genes involved in the biosynthesis and regulation of GA in crop plants are poorly understood.We isolated the mutant gad5-1(GAAssociated Dwarf 5),characterized by dwarfing,short internodes,and dark green and short leaves.Map-based gene cloning and allelic verification confirmed that ZmGAD5 encodes ent-kaurenoic acid oxidase(KAO),which catalyzes KA(ent-kaurenoic acid)to GA12 conversion during GA biosynthesis in maize.ZmGAD5 is localized to the endoplasmic reticulum and is present in multiple maize organs.In gad5-1,the expression of ZmGAD5 is severely reduced,and the levels of the direct substrate of KAO,KA,is increased,leading to a reduction in GA content.The abnormal phenotype of gad5-1 was restored by exogenous application of GA3.The biomass,plant height,and levels of GA12 and GA3 in transgenic Arabidopsis overexpressing ZmGAD5 were increased in comparison with the corresponding controls Col-0.These findings deepen our understanding of genes involved in GA biosynthesis,and could lead to the development of maize lines with improved architecture and higher planting-density tolerance.

关键词： Maize(Zea mays L.) ZmGAD5 GA biosynthesis KAO

Cell type-specific proteomics uncovers a RAF15-SnRK2.6/OST1 kinase cascade in guard cells

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植物学报:英文版 2023年第9期65卷 2122-2137页

作者： Hongliang Wang Yubei Wang Tian Sang Zhen Lin Rongxia Li Weiwei Ren Xin Shen Bing Zhao Xiao Wang Xuebin Zhang Shaoqun Zhou Shaojun Dai Honghong Hu chun-peng song pengcheng Wang Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China Institute of Advanced Biotechnology and School of Life Sciences Southern University of Science and TechnologyShenzhen 518055China Shanghai Bioprofile Technology Company Ltd Shanghai 200241China Center of Plant Germplasm Resources College of Life SciencesShanghai Normal UniversityShanghai 200234China National Key Laboratory of Crop Genetic Improvement College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Crop Stress Adaptation and Improvement College of Life SciencesCollege of AgricultureAcademy for Advanced Interdisciplinary StudiesHenan UniversityKaifeng 475004China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Multicellular organisms such as plants contain various cell types with specialized functions.Analyzing the characteristics of each cell type reveals specific cell functions and enhances our understanding of organization and function at the organismal level.Guard cells(GCs)are specialized epidermal cells that regulate the movement of the stomata and gaseous exchange,and provide a model genetic system for analyzing cell fate,signaling,and function.Several proteomics analyses of GC are available,but these are limited in depth.Here we used enzymatic isolation and flow cytometry to enrich GC and mesophyll cell protoplasts and perform in-depth proteomics in these two major cell types in Arabidopsis leaves.We identified approximately 3,000 proteins not previously found in the GC proteome and more than600 proteins that may be specific to GC.The depth of our proteomics enabled us to uncover a guard cell-specific kinase cascade whereby Raf15and Snf1-related kinase2.6(SnRK2.6)/OST1(open stomata 1)mediate abscisic acid(ABA)-induced stomatal closure.RAF15 directly phosphorylated SnRK2.6/OST1 at the conserved Ser175 residue in its activation loop and was sufficient to reactivate the inactive form of SnRK2.6/OST1.ABAtriggered SnRK2.6/OST1 activation and stomatal closure was impaired in raf15 mutants.We also showed enrichment of enzymes and flavone metabolism in GC,and consistent,dramatic accumulation of flavone metabolites.Our study answers the long-standing question of how ABA activates SnRK2.6/OST1 in GCs and represents a resource potentially providing further insights into the molecular basis of GC and mesophyll cell development,metabolism,structure,and function.

关键词： abscisic acid guard cell metabolomics phosphorylation proteomics signaling

Phase separation in plants:New insights into cellular compartmentalization

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Journal of Integrative Plant Biology 2021年第11期63卷 1835-1855页

作者： Xiumei Xu Canhui Zheng Dandan Lu chun‐peng song Lixin Zhang State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China

A fundamental challenge for cells is how to coordinate various biochemical reactions in space and time. To achieve spatiotemporal control, cells have developed organelles that are surrounded by lipid bilayer membranes. Further, membraneless compartmentalization, a process induced by dynamic physical association of biomolecules through phase transition offers another efficient mechanism for intracellular organization. While our understanding of phase separation was predominantly dependent on yeast and animal models, recent findings have provided compelling evidence for emerging roles of phase separation in plants. In this review, we first provide an overview of the current knowledge of phase separation, including its definition, biophysical principles, molecular features and regulatory mechanisms. Then we summarize plant-specific phase separation phenomena and describe their functions in plant biological processes in great detail. Moreover, we propose that phase separation is an evolutionarily conserved and efficient mechanism for cellular compartmentalization which allows for distinct metabolic processes and signaling pathways, and is especially beneficial for the sessile lifestyle of plants to quickly and efficiently respond to the changing environment.

关键词： cellular compartmentalization changing environment condensates liquid droplets phase separation

Arabidopsis CAP1 mediates ammonium-regulated root hair growth by influencing vesicle trafficking and the cytoskeletal arrangement in root hair cells

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Journal of Genetics and Genomics 2022年第10期49卷 986-989页

作者： Juanjuan Yu Xiaonan Ma Lianlian Wang Nannan Dong Kai Wang Qingye You Yifei Xu Chong Wang Zhiping Dong Zhaobin Shi Shaojun Dai Ling Bai chun-peng song State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifengHenan 475001China Henan International Joint Laboratory of Agricultural Microbial Ecology and Technology College of Life SciencesHenan Normal UniversityXinxiangHenan 453007China Development Center of Plant Germplasm Resources College of Life SciencesShanghai Normal UniversityShanghai 200234China

Plant root hairs are essential for mineral and water absorption,which possess sophisticated sensory mechanisms to allow them to respond to different environmental signals.Ammonium(NH^(+))is a major form of nitrogen in... 详细信息

关键词： arrangement hair Arabidopsis