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Regulation of OsPR10a Promoter Activity by Phytohormone and Pathogen Stimulation in Rice

Rice Science 2021年第5期28卷 442-460页

作者： ZHENG Ersong WANG Xuming XU Rumeng YU Feibo ZHENG Chao YANG Yong CHEN Yang CHEN Jianping YAN Chengqi ZHOU Jie State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts/Ministry of Agriculture Key Laboratory for Plant Protection and Biotechnology/Zhejiang Provincial Key Laboratory of Plant Virology/Zhejiang Academy of Agricultural Sciences College of Chemistry and Life Sciences Zhejiang Normal University Yueqing Station of Plant Protection College of Plant Protection Northwest A&F University Institute of Plant Virology Ningbo University Institute of Biotechnology Ningbo Academy of Agricultural Sciences

OsPR10 a is one of the well known pathogenesis-related genes in rice, and is induced by multiple plant hormones and pathogens. However, the underlying transcriptional regulation mechanisms in response to different signals and their crosstalks are still largely unknown. In order to find new players participated in the activation of OsPR10 a, we systematically analyzed the basal expression patterns as well as the expression responses of a 2.5 kb Os PR10 a promoter in rice transgenic plants after Phytohormone and pathogen stimulations. In agreement with the native gene expression, the OsPR10 a promoter can drive glucuronidase(GUS) gene expressing in spots of leaf cells, leaf trichomes, lemmas and paleae, germinating embryos, calli and root tips. The leaf expression of OsPR10 a::GUS was dramatically increased upon jasmonic acid(JA) and cytokinin(CK) treatments, or challenges of the pathogen Magnaporthe grisea and Xanthomonas oryzae pv. oryzae. Thus, the OsPR10 a promoter reported here can faithfully reflect its native gene expression. The effects of several JA and CK responsive OsWRKY genes on the regulation of OsPR10 a promoter were then inspected by luciferase transient expression assay, and the JA inducible Os WRKY10 transcription factor was found as a new positive regulator of OsPR10 a. However, the key transcription factors of JA and CK signaling pathways, OsMYC2 and B-type response regulators, were not responsible for the activation of Os PR10 a promoter. Our findings provided new insights into the regulation of Os PR10 a expression during plant-hormone/pathogen interactions, and the Os PR10 a reporter system can be useful to unravel novel regulators from both pathogen and host.

关键词： OsPR10a promoter β-glucuronidase Phytohormone pathogen OsWRKY10 rice

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Melatonin retards leaf senescence by modulating Phytohormone metabolism in stored Chinese flowering cabbage

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Food Quality and Safety 2023年第4期7卷 597-612页

作者：李辰翔申雪萌范中奇陈建业陶能国谭小丽 School of Chemical Engineering Xiangtan UniversityXiangtanChina State Key Laboratory for Conservation and Utilization of Subtropical Agrobioresources Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and VegetablesGuangdong Vegetables Engineering Research CenterEngineering Research Center of Southern Horticultural Products PreservationMinistry of EducationCollege of HorticultureSouth China Agricultural UniversityGuangzhouChina Institute of Postharvest Technology of Agricultural Products College of Food ScienceFujian Agriculture and Forestry UniversityFuzhouChina

This paper was conducted to explore the effects of melatonin(MT)on the senescence of stored Chinese flowering cabbage and the potential modulatory mechanisms involved.The physiological findings demonstrated that MT successfully reduced chlorophyll loss and improved the photochemical effectiveness of cabbage leaves.In addition,MT decreased the transcription of senescence-associated genes(BrSAG12)and genes responsible for chlorophyll breakdown.Transcriptome analysis showed that MT-regulated genes were enriched in oxidative phosphorylation,hormone metabolism and signal transduction,and MT treatment reduced the high expression of genes linked to generation of reactive oxygen species(ROS),energy metabolism,Phytohormone(abscisic acid(ABA),ethylene(ET),and jasmonic acid(JA))biological synthesis and signal transduction while promoting the activation of genes related to scavenging ROS,energy biosynthesis and plant–pathogen interactions.We emphasized the examination of the potential interaction between Phytohormone metabolism and MT.The results showed that the application of MT decreased ABA,ET,and JA levels as well as the expression of their biosynthesis genes,concurrently maintaining higher expression of cytokinin,auxin and gibberellin biosynthetic genes and lower expression of degradation genes.Regulatory networks of transcription factors(TFs)and genes related to ABA,ET and JA metabolism showed that TFs such as DNA-binding One Zinc Finger 5.7(DOF5.7),WRKY40,and homeobox-leucine zipper protein-16(ATHB-16)might play important transcriptional regulatory roles in mediating MT postponed leaf senescence.Taken together,these findings suggested that the postponed senescence of cabbage treated with MT might be ascribed to the regulated oxidative phosphorylation,energy,Phytohormone metabolism,and transcription factors.

关键词： Cabbage melatonin transcriptome leaf senescence Phytohormone

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Expression of a cotton MADS-box gene is regulated in anther development and in response to Phytohormone signaling

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Journal of Genetics and Genomics 2010年第12期37卷 805-816页

作者： Su-Qiang Shao Bing-Ying Li Ze-Ting Zhang Ying Zhou Jia Jiang Xue-Bao Li Hubei Kei Laboratory of Genetic Regulation and Integrative Biology College of Life SciencesHuaZhong Normal UniversityWuhan 430079China

MADS-box gene family encodes a large number and variety of transcription regulators in plants. In this study, a cDNA, GhMADS9, encoding a typical MADS protein with 230 amino acids was isolated from cotton flower cDNA library. Subsequently, a 1,623 bp genomic DNA fragment of GhMADS9 gene was isolated in cotton by PCR. Compared with its cDNA sequence, six introns were found in GhMADS9 gene. Fluorescent microscopy indicated that GhMADS9 protein localized in the nucleus. Transactivation activity assay in yeast cells revealed that GhMADS9 protein did not show transcriptional activation. Quantitative RT-PCR analysis showed that GhMADS9 was specially expressed in cotton anthers. Further in situ hybridization analysis demonstrated that strong expression of GhMADS9 gene was detected in developing pollens, but no or weak signals were found in the other anther tissues. Furthermore, GhMADS9 expression was dramatically up-regulated in anthers with abscisic acid (ABA) treatment, whereas its activity was down-regulated when treated by gibberellin (GA3). Collectively, our results suggest that GhMADS9 is a transcription factor and might be involved in cotton anther/pollen development and in response to ABA and GA3 signaling.

关键词： cotton (Gossypium hirsutum) anther/pollen development MADS protein gene expression Phytohormone

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Regulation of OsPRIOa Promoter Activity by Phytohormone and Pathogen Stimulation in Rice

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Rice science 2021年第5期28卷 442-456页

作者： Zheng Ersong Wang Xuming Xu Rumeng Yu Feibo Zheng Chao Yang Yong Chen Yang Chen Jianping Yan Chengqi Zhou Jie State Key Laboratory far Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts/Ministry of Agriculture Key Laboratory far Plant Protection and Biotechnology/Zhejiang Provincial Key Laboratory of Plant Virology/Zhejiang Academy of Agricultural Sciences Hangzhou 310021China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321000China Yueqing Station of Plant Protection Wenzhou 325600China College of Plant Protection Northwest A&F UniversityWangling 712100China Institute of Plant Virology Ningbo UniversityNingbo 315211China institute of Biotechnology Ningbo Academy of Agricultural SciencesNingbo 315101China

OsPRIOa is one of the well known pathogenesis-related genes in rice,and is induced by multiple plant hormones and pathogens.However,the underlying transcriptional regulation mechanisms in response to differe nt signals and their crosstalks are still largely unknown.In order to find new players participated in the activation of OsPRIOa,we systematically analyzed the basal expression patterns as well as the expression responses of a 2.5 kb OsPRIOa promoter in rice transgenic plants after Phytohormone and pathogen stimulations.In agreement with the native gene expression,the OsPRIOa promoter can drive glucuronidase(GUS)gene expressing in spots of leaf cells,leaf trichomes,lemmas and paleae,germinating embryos,calli and root tips.The leaf expression of OsPR10a::GUS was dramatically in creased upon jasm onic acid(JA)and cytoki nin(CK)treatme nts,or challe nges of the pathogen Magnaporthe grisea and Xanthomonas oryzae pv.oryzae.Thus,the OsPRIOa promoter reported here can faithfully reflect its native gene expression.The effects of several JA and CK responsive OsWRKY genes on the regulation of OsPRIOa promoter were then inspected by luciferase transient expression assay,and the JA inducible OsWRKYlO transcription factor was found as a new positive regulator of OsPRIOa.However,the key transcription factors of JA and CK signaling pathways,OsMYC2 and B-type response regulators,were not responsible for the activation of OsPRIOa promote Our findings provided new in sights into the regulation of OsPRIOa expression during plan t-hormone/pathoge n interactions,and the OsPRIOa reporter system can be useful to unravel novel regulators from both pathogen and host.

关键词： OsPRIOa promoter β-glucuronidase Phytohormone pathogen OsWRKY10 rice

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Relation between Phytohormone level and vascular bridge differentiation in graft union of explanted internode autografting

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Chinese Science Bulletin 1999年第20期44卷 1874-1878页

作者： Shanfa Lu Yanru Song Chinese Acad Sci Inst Bot Beijing 100093 Peoples R China

Development of the graft union of explanted internode autografting of cucumber ( Cu-cumis sativus Linn.) cultured in vitro is regulated by plant hormones exogenously added to the media. The levels of auxin (indole-3-acetic acid, IAA) and zeatin plus zeatin riboside (Z+ ZR) in graft unions and in 4 parts of the graft union have been analyzed by ELISA assay.

关键词： explanted internode autografting Phytohormone vascular bundle Cucumis sativus.

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Interplay of Phytohormones and epigenetic regulation:A recipe for plant development and plasticity

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Journal of Integrative Plant Biology 2023年第2期65卷 381-398页

作者： Kai Jiang Hongwei Guo Jixian Zhai Institute of Plant and Food Science Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education InstitutesDepartment of BiologySchool of Life SciencesSouthern University of Science and Technology(SUSTech)Shenzhen 518055China

Both Phytohormone signaling and epigenetic mechanisms have long been known to play crucial roles in plant development and plasticity in response to ambient stimuli.Indeed,diverse signaling pathways mediated by Phytohormones and epigenetic processes integrate multiple upstream signals to regulate various plant traits.Emerging evidence indicates that Phytohormones and epigenetic processes interact at multiple levels.In this review,we summarize the current knowledge of the interplay between Phytohormones and epigenetic processes from the perspective of Phytohormone biology.We also review chemical regulators used in epigenetic studies and propose strategies for developing novel regulators using multidisciplinary approaches.

关键词： chemical genetics epigenetics Phytohormone plant growth and development plant growth regulator plasticity

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Role of methylotrophic bacteria in managing abiotic stresses for enhancing agricultural production

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Pedosphere 2023年第1期33卷 49-60页

作者： Harshida GAMIT Natarajan AMARESAN C.G.Bhakta Institute of Biotechnology Uka Tarsadia UniversityMaliba CampusBardoliSurat 394350(India)

Abiotic stresses are a significant factor that considerably limits plant growth and productivity.Methylotrophs are an essential group of bacteria that utilize volatile carbon compounds,are prolific colonizers of different plant parts,and play a vital role in plant growth promotion(PGP)under stress conditions.Numerous rhizospheric and phyllosphere methylotrophs have been reported to exhibit PGP activities with superior stress-tolerating capacity against drought,heavy metal,salinity,high and low temperatures,solar ultraviolet radiation,and other harsh environmental conditions.Methylotrophs promote plant growth through N2 fixation,phosphate solubilization,production of Phytohormones(i.e.,auxins,gibberellins,and cytokinins),1-aminocyclopropane-1-carboxylic acid(ACC)deaminase activity,siderophore,ammonia production,and secondary metabolites.The production of these compounds by methylotrophs protects a plant against adverse environmental conditions and influences its productivity.This review discusses the role methylotrophs play in managing various abiotic stresses,how they help mitigate these stresses,and how they improve agricultural productivity.

关键词： methylotroph Phytohormone plant growth promotion attribute reactive oxygen species stress mitigation

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Regulation and integration of plant jasmonate signaling:a comparative view of monocot and dicot

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Journal of Genetics and Genomics 2022年第8期49卷 704-714页

作者： Shiwei Wan Xiu-Fang Xin National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China CAS-JIC Center of Excellence for Plant and Microbial Sciences(CEPAMS) Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

The Phytohormone jasmonate plays a pivotal role in various aspects of plant life,including developmental programs and defense against pests and pathogens.A large body of knowledge on jasmonate biosynthesis,signal transduction as well as its functions in diverse plant processes has been gained in the past two decades.In addition,there exists extensive crosstalk between jasmonate pathway and other Phytohormone pathways,such as salicylic acid(SA)and gibberellin(GA),in co-regulation of plant immune status,fine-tuning the balance of plant growth and defense,and so on,which were mostly learned from studies in the dicotyledonous model plants Arabidopsis thaliana and tomato but much less in monocot.Interestingly,existing evidence suggests both conservation and functional divergence in terms of core components of jasmonate pathway,its biological functions and signal integration with other Phytohormones,between monocot and dicot.In this review,we summarize the current understanding on JA signal initiation,perception and regulation,and highlight the distinctive characteristics in different lineages of plants.

关键词： Jasmonate Phytohormone Signaling Crosstalk Plant defense Development Stress response

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The Future of Phytohormone Societies

The Future of Phytohormone Societies

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2005年全国植物生长物质研讨会

作者： Louise Ferguson Department of Pomology University of California at Davis1 Shields AveDavis CA 95616USA

＜正＞There have been five great revolutions in agriculture.They are, the use of draft animals, Mendelian genetics, the industrial revolution, agricultural chemicals and molecular techniques. Phytohormones played a large role in the fourth revolution and will play an even larger role in the fifth.In the fourth revolution, when Phytohormones were first discovered scientists focused on delineating their function in plants.The results were only as good as the techniques available and dictated the current production practices.For example, the effect of gibberellins on cell growth led to Dr. Charles Coggins’s work determining the use of gibberellin to maintain citrus peel

关键词： Phytohormone Gibberellins Revolution

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The Growth-Promoting Mechanism of Brevibacillus laterosporus AMCC100017 on Apple Rootstock Malus robusta

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Horticultural Plant Journal 2022年第1期8卷 22-34页

作者： Xiaona Wang Jiucheng Zhang Xiaofei Wang Jianping An Chunxiang You Bo Zhou Yujin Hao State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anShandong 271018China Department of Microbiology College of Life SciencesShandong Agricultural UniversityTai’anShandong 271018China National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources Tai’anShandong 271018China

Plant growth-promoting rhizobacteria(PGPR) located in rhizobacteria soil are beneficial to plant growth and development. A PGPR strain AMCC100017 of Brevibacillus laterosporus synthesizes the plant hormone IAA in a tryptophan-dependent manner. In this study, the AMCC100017 strain was used to treat Malus robusta, an excellent natural rootstock for apple production, and assess its ability to promote growth. The fresh weight, dry weight, plant height, and lateral root growth of M. robusta were significantly increased with treatment. The presence of the AMCC100017 strain increased IAA content in M. robusta and promoted root secretion of tryptophan. Colonization of the strain in the roots allowed continuous synthesis of IAA and promoted plant growth. In addition, the photosynthetic efficiency in leaves increased after microbial treatment, and the utilization of nitrogen, zinc, iron, copper and magnesium in leaves was increased, which was conducive to photosynthesis.Interestingly, the activities of CAT and SOD, as well as the contents of ROS in plants colonized by AMCC100017 were increased compared to control plants, but the activities of POD and MDA contents were decreased. AMCC100017 strain affected the antioxidant capacity and stress resistance of plants. AMCC100017 strain increased the content of soluble protein and soluble sugar in plants, improved plant metabolic activity and stress resistance. Therefore, AMCC100017 not only increased IAA content and photosynthetic efficiency to promote M. robusta growth, but also affected plant through multiple metabolic pathways.

关键词： Malus robusta PGPR Phytohormone photosynthetic efficiency

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