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植物分子生物学与现代农业——2010全国植物生物学研讨会

作者： shuhuayang~**,xiaozhen huang,and haibian yang state key laboratory of plant physiology and biochemistry,college of biological sciences,china agricultural university,beijing 100193,china

Low temperature is one of environmental factors that restrict plant growth homeostasis and plant-pathogen *** studies suggest a link between temperature responses and defense responses;however,the underlying molecular... 详细信息

关键词： low temperature defense responses chs mutants Arabidopsis

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A Novel Chloroplast-localized Protein EMB1303 is Required for Chloroplast Development in Arabidopsis

A Novel Chloroplast-localized Protein EMB1303 is Required fo...

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2009整合植物生物学研讨会

作者： xiaozhen huang~1,Xiaoyan Zhang~1 and Shuhua yang~(1,2*) 1 state key laboratory of plant physiology and biochemistry,college of biological sciences, china agricultural university,beijing 100193,china 2 National plant Gene Research Center,beijing 100193,china.

To understand the molecular mechanisms underlying chloroplast development,we isolated and characterized the Arabidopsis albino mutant *** mutant displayed a severe dwarf phenotype with small albino rosette leaves and short roots on a synthetic medium containing *** is pigment-deficient and seedling lethal when grown in ***

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Ethylene signaling regulation of freezing tolerance in Arabidopsis

Ethylene signaling regulation of freezing tolerance in Arabi...

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从植物科学到农业发展——2012全国植物生物学大会

作者： Yiting Shi,Shouwei Tian,Lingyan Hou,xiaozhen huang,Xiaoyan Zhang,and shuhuayang~** state key laboratory of plant physiology and biochemistry,college of biological sciences,china agricultural university,beijing 100193,china.

The phytohormone ethylene regulates multiple aspects of plant growth and development and responses to environmental ***,the exact role of ethylene in response to freezing stress remains ***,we show that ethylene negatively regulates plant responses to freezing stress in *** tolerance was decreased in ethylene overproducerl mutant and by the application of the ethylene precursor ACC,but increased by the addition of the ethylene biosynthesis inhibitor AVG or the perception antagonist Ag. Furthermore,ethylene insensitive mutants,including etr1-1,ein4-1,ein2-5,ein3-1 and ein3 eil1,displayed enhanced freezing *** contrast,the constitutive ethylene response mutant ctr1-1 and EIN3-overexpressmg plants exhibited reduced freezing tolerance. Genetic and biochemical analyses revealed that EIN3 negatively regulated the expression of CBFs and type-A ARR5,ARR7 and ARR15 by binding to specific elements in their *** of these ARR genes enhanced the freezing tolerance of plants. Thus,our study demonstrates that ethylene negatively regulates plant freezing tolerance by repressing the cold-regulated CBFs and type-A ARR genes mediated by EIN3/EIL1.

关键词： ethylene freezing tolerance EIN3 CBF type-A ARR Arabidopsis

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The Crosstalk of Cold Stress and Defense Responses in Arabidopsis

The Crosstalk of Cold Stress and Defense Responses in Arabid...

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2010全国植物生物学研讨会

作者： Shuhua yang xiaozhen huang haibian yang state key laboratory of plant physiology and biochemistry College of Biological Sciences China Agricultural University

关键词： low temperature defense responses chs mutants Arabidopsis

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The Antagonistic Action of Abscisic Acid and Cytokinin Signaling Mediates Drought Stress Response in Arabidopsis

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Molecular plant 2018年第7期11卷 970-982页

作者： xiaozhen huang Lingyan Hou Jingjing Meng Huiwen You Zhen Li Zhizhong Gong Shuhua yang Yiting Shi state key laboratory of plant physiology and biochemistry College of Biological Sciences China Agricultural University Beijing 100193 China School of Pharmaceutical sciences Capital Medical University Beijing 100020 China

As sessile organisms, plants encounter a variety of environmental stresses and must optimize their growth for survival. Abscisic acid （ABA） and cytokinin antagonistically regulate many developmental processes and environmental stress responses in plants. However, the molecular mechanism underlying this antag- onism remains poorly defined. In this study, we demonstrated that Sucrose nonfermentingl-related kinases SnRK2.2, SnRK2.3, and SnRK2.6, the key kinases of the ABA signaling pathway, directly interact with and phosphorylate type-A response regulator 5 （ARR5）, a negative regulator of cytokinin signaling. The phosphorylation of ARR5 Ser residues by SnRK2s enhanced ARR5 protein stability. Accord- ingly, plants overexpressing ARR5 showed ABA hypersensitivity and drought tolerance, and these pheno- types could not be recapitulated by overexpressing a non-phosphorylated ARR5 mimic. Moreover, the type-B ARRs, ARR1, ARR11 and ARR12, physically interacted with SnRK2s and repressed the kinase activ- ity of SnRK2.6. The arrl, 11,12 triple mutant exhibited hypersensitivity to ABA. Genetic analysis demon- strated that SnRK2s act upstream of ARR5 but downstream of ARR1, ARR11 and ARR12 in mediating ABA response and drought tolerance. Taken together, this study unravels the antagonistic actions of several molecular components of the ABA and cytokinin signaling pathways in mediates drought stress response, providing significant insights into how plants coordinate growth and drought stress response by integrating multiple hormone pathways.

关键词： SnRK2s type-A ARR5 type-B ARRs drought stress Arabidopsis

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Overexpression of a Hydroxyproline-rich Glycoprotein(HRGP)in Arabidopsis Affects plant Development and Defense Responses

Overexpression of a Hydroxyproline-rich Glycoprotein(HRGP)in...

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全国农业生物化学与分子生物学第十五届学术研讨会

作者： xiaozhen huang Yao Zhang Degang Zhao The key laboratory of plant Resources Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education) Institute of Agro-BioengineeringGuizhou University state key laboratory of plant physiology and biochemistry College of Biological SciencesChina Agricultural University

Hydroxyproline-rich glycoproteins(HRGPs) are reported to function in many cellular and physiological processes;however,their biological roles are not completely *** this study,we identified a novel Arabidopsis HRGP gene:*** out NHRGP did not result in obvious deleterious phenotypes,but transgenic plants overexpressing NHRGP(OE-N3 and OE-N6)exhibited several remarkable phenotypes in both vegetative and reproductive stages,including altered leaf and root morphology,inhibition of inflorescence elongation and thickening,defects in flower development and reduced seed *** characterization revealed that NHRGP was expressed differentially in organs and could be induced by various defense-related *** and quantitative real-time PCR data showed that many defense-related genes as well as many cell wall modification genes were up-regulated in the OE-N6 compared with wild-type ***-N6 plants displayed enhanced resistance to Pseudomonas syringae *** tomato DC3000 in a pathogen infection *** sum,by means of phenotypic and bioinformatics analyses,we demonstrated that overexpression of NHRGP in Arabidopsis affects plant development and defense responses.

关键词： Arabidopsis thaliana defence development hydroxyproline rich glycoproteins overexpression

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