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abiotic stresses and Phytohormones Regulate Expression of FAD2 Gene in Arabidopsis thaliana

Journal of Integrative Agriculture 2012年第1期11卷 62-72页

作者： YUAN Si-wei WU Xue-long LIU Zhi-hong LUO Hong-bing HUANG Rui-zhi Key Laboratory of Plant Metabolic Engineering of Zhejiang Province/Institute of Virology and Biotechnology Zhejiang Academy of Agricultural Sciences Hangzhou 310021 P.R.China College of Agronomy Hunan Agricultural University Changsha 410128 P.R. China

Modification of unsaturated fatty acid （FA） levels has been found to accompany multiple abiotic stress acclimations in many plants. Delta 12 fatty acid desaturase （FAD2） plays a critical role in the synthesis of polyunsaturated FAs in plant cells by converting oleic acid （18：1） to linoleic acid （18：2）. To better understand the relationship between polyunsaturated FAs metabolism and stress adaptation, the expression of FAD2 gene and changes in the FA compositions under various abiotic stresses and phytohormone treatments in Arabidopsis thaliana was investigated in this study. A 1 423-bp promoter of the FAD2 gene was cloned and characterized from Arabidopsis. Several putative hormone- and stress- inducible cis-elements were identified in the cloned promoter, which include salt- and pathogen-inducible GT-1 motifs, low-temperature-responsive MYC element, dehydration-responsive MYB element, and GA signaling related WRKY71OS element. To investigate the fine regulation of FAD2 gene, a recombinant FAD2 promoter-GUS construct was introduced into Arabidopsis plants. Histochemical study showed that the promoter was ubiquitously active and responsive not only to exogenous phytohormones including ABA, 24-eBL, and SA but also to darkness, temperature, salt, and sucrose stresses in Arabidopsis seedlings. Consistent with the expression change, treatments with exogenous 24-eBL, ABA, SA, and NaCl resulted in reduction in polyunsaturated FAs in Arabidopsis seedlings. These findings suggest that the FAD2 gene with a wide variety of putative response elements in its promoter is responsive to multiple phytohormones and abiotic stresses and therefore may play an important role in stress responses of Arabidopsis during plant growth and seed development.

关键词： FAD2 abiotic stresses phytohormones fatty acid (FA) Arabidopsis thaliana

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Genome wide investigation of Hsf gene family in Phoebe bournei:identification,evolution,and expression after abiotic stresses

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Journal of Forestry Research 2024年第5期35卷 201-215页

作者： Wenhai Liao Xinghao Tang Jingshu Li Qiumian Zheng Ting Wang Shengze Cheng Shiping Chen Shijiang Cao Guangqiu Cao College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002People’s Republic of China University Key Laboratory of Forest Stress Physiology Ecology and Molecular Biology of Fujian ProvinceFuzhou 350002People’s Republic of China Fujian Academy of Forestry Sciences Fuzhou 350002People’s Republic of China College of Plant Protection Fujian Agriculture and Forestry UniversityFuzhou 350002People’s Republic of China

Heat shock transcription factors(Hsfs)have important roles during plant growth and development and responses to abiotic *** identification and func-tion of Hsf genes have been thoroughly studied in various herbaceous plant species,but not woody species,especially Phoebe bournei,an endangered,unique species in *** this study,17 members of the Hsf gene family were identi-fied from *** using bioinformatic ***-netic analysis indicated that PbHsf genes were grouped into three subfamilies:A,B,and *** motifs,three-dimensional structure,and physicochemical properties of the PbHsf proteins were also *** structure of the PbHsf genes varied in the number of exons and ***-diction of cis-acting elements in the promoter region indi-cated that PbHsf genes are likely involved in responses to plant hormones and stresses.A collinearity analysis dem-onstrated that expansions of the PbHsf gene family mainly take place via segmental *** expression levels of PbHsf genes varied across different plant *** the basis of the expression profiles of five representative PbHsf genes during heat,cold,salt,and drought stress,PbHsf pro-teins seem to have multiple functions depending on the type of abiotic *** systematic,genome-wide investigation of PbHsf genes in *** and their expression patterns provides valuable insights and information for further func-tional dissection of Hsf proteins in this endangered,unique species.

关键词： Phoebe bournei Hsf gene family Evolutionary analysis Expression mechanism abiotic stresses

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A rice XANTHINE DEHYDROGENASE gene regulates leaf senescence and response to abiotic stresses

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The Crop Journal 2022年第2期10卷 310-322页

作者： Jiangmin Xu Chenyang Pan Han Lin Hanfei Ye Sheng Wang Tao Lu Qianyu Chen Kairu Yang Mei Lu Qian Qian Deyong Ren Yuchun Rao College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004ZhejiangChina State Key Lab for Rice Biology China National Rice Research InstituteHangzhou 310006ZhejiangChina

Xanthine dehydrogenase, a member of the molybdenum enzyme family, participates in purine metabolism and catalyzes the generation of ureides from xanthine and hypoxanthine. However, the mechanisms by which xanthine dehydrogenase affects rice growth and development are poorly understood. In the present study, we identified a mutant with early leaf senescence and reduced tillering that we named early senescence and less-tillering 1(esl1). Map-based cloning revealed that ESL1 encodes a xanthine dehydrogenase, and it was expressed in all tissues. Chlorophyll content was reduced and chloroplast maldevelopment was severe in the esl1 mutant. Mutation of ESL1 led to decreases in allantoin, allantoate, and ABA contents. Further analysis revealed that the accumulation of reactive oxygen species in esl1 resulted in decreased photosynthesis and impaired chloroplast development, along with increased sensitivity to abscisic acid and abiotic stresses. Ttranscriptome analysis showed that the ESL1 mutation altered the expression of genes involved in the photosynthesis process and reactive oxygen species *** results suggest that ESL1 is involved in purine metabolism and the induction of leaf *** findings reveal novel molecular mechanisms of ESL1 gene-mediated plant growth and leaf senescence.

关键词： Xanthine dehydrogenase Leaf senescence abiotic stresses Purine metabolism

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Genome-wide identification of U-box gene family and expression analysis under abiotic stresses in Salvia miltiorrhiza

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BIOCELL 2022年第7期46卷 1751-1762页

作者： JIANMIN PAN XIN LI JUANJUAN LI HUI LIU ZHUONI HOU ZONGQI YANG LING XU Zhejiang Province Key Laboratory of Plant Secondary Metabolism and Regulation College of Life Sciences and MedicineZhejiang Sci-Tech UniversityHangzhou310018China UWA School of Agriculture and Environment and The UWA Institute of Agriculture Faculty of ScienceThe University of Western AustraliaPerth6009Australia

Plant U-box(PUB)E3 ubiquitin ligases play important roles in hormone signaling pathways and in response to different abiotic stresses,but little is known about U-box genes in Danshen(root of Salvia miltiorrhiza Bunge).Here,we identified and characterized 70 SmPUB genes based on its genome *** analysis of U-box genes from *** and Arabidopsis suggested that they can be clustered into seven subgroups(I–VII).Typical U-box domains were found in all identified SmPUB genes through the analysis of conserved ***,qRT-PCR was applied to analyze the relative expression levels of U-box genes in *** roots and leaves under PEG-induced water deficit and salt *** revealed that the SmPUB genes exhibited stronger response to drought than to salt *** the best of our knowledge,this report is the first to perform genome-wide identification and analysis of the U-box gene family in ***,and the results provide valuable information for better understanding of the function of U-box in ***.

关键词： Salvia miltiorrhiza U-box E3 ubiquitin ligase Gene-family abiotic stresses Expression pattern

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The critical role of autophagy in plant responses to abiotic stresses

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Frontiers of Agricultural Science and Engineering 2017年第1期4卷 28-36页

作者： Yu WANG Jie ZHOU Jingquan YU College of Agriculture and Biotechnology Zhejiang University Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Key Laboratory of Horticultural Plants Growth Development and Quality Improvement Ministry of Agriculture

Autophagy is an evolutionary conserved recycling process in eukaryotes whereby intracellular components are engulfed by autophagosomes, which are subsequently transferred to the vacuoles for further degradation and reuse. In organisms like yeast and metazoans, autophagy is actively engaged during environmental perturbation either by degrading denatured proteins and organelles or by interfacing with stress related signaling molecules. Studies over the last decade have also revealed numerous important mechanisms where autophagy is widely involved in plant abiotic stress responses. Autophagy serves as a pivotal route for nutrient remobilization by the degradation of superfluous or damaged cellular cytoplasmic material and organelles. It is also reported to regulate the accumulation of reactive oxygen species, to maintain the cellular redox balance of plants under stressful conditions. Furthermore, autophagy is essential in regulating cellular toxicity by removing aggregated and/or denatured proteins and thereby improving plant stress tolerance. In this review, recent advances in our understanding of autophagy, along with pathways and regulatory networks through which it influences many aspects of plant growth and development in response to nutrient starvation, oxidative stress, osmotic stress and extreme temperatures are discussed.

关键词： abiotic stresses autophagy extreme temperature nutrient starvation osmotic stress oxidative stress

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PDR transporters in medicinal plant Panax ginseng involved in ginsenosides transport and abiotic stresses

PDR transporters in medicinal plant Panax ginseng involved i...

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生态文明建设中的植物学：现在与未来——中国植物学会第十五届会员代表大会暨八十周年学术年会

作者： Zhi-Yong Luo Ru Zhang Jie Zhu Hong-Zhe Cao Jing-Jia Huang Molecular Biology Research Center School of Life SciencesCentral South University State Key Laboratory of Medical Genetics Xiangya School of MedicineCentral South University

Plants produce a large number of secondary metabolites,such as terpenoids,alkaloids and *** metabolites play important functions as protectants for plants against herbivores and pathogens,as well as abiotic ***,accumulation and transport of these metabolites are highly regulated in plant to accomplish the *** plant pleiotropic drug resistance(PDR) family of ATP-binding cassette(ABC) transporters is potentially involved in the transport of secondary metabolites,currently,little is known about their actual *** this study,we cloned two PDR genes(PgPDR2 and PgPDR3)

关键词： PDR transporters ginsenosides transport abiotic stresses Panax ginseng Acknowledgements

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A wheat WRKY transcription factor TaWRKY10 confers tolerance to multiple abiotic stresses in transgenic tobacco

A wheat WRKY transcription factor TaWRKY10 confers tolerance...

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第十四届全国植物基因组学大会

作者： Chen Wang Pengyi Deng Xiatian Wang Wei Hu Kexiu Li Junli Chang Mingjie Chen Yuesheng Wang Guangxiao Yang Guangyuan He The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology Key Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology(HUST)

WRKY transcription factors are involved in defense regulation,stress response and plant growth and ***,the precise role of WRKY transcription factors in abiotic stress response is not completely understood,especially ... 详细信息

关键词： WRKY transcription factor genetic transformation gene expression abiotic stresses wheat

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Mechanisms of autophagy function and regulation in plant growth,development,and response to abiotic stress

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The Crop Journal 2023年第6期11卷 1611-1625页

作者： Yongbo Li Xiangmin Xu Guang Qi Dezhou Cui Chen Huang Xinxia Sui Genying Li Qingqi Fan Crop Research Institute Shandong Academy of Agricultural SciencesJinan 250100ShandongChina Yantai University Yantai 264005ShandongChina

Autophagy is an evolutionarily conserved degradation pathway of lysosomes(in mammals)and vacuoles(in yeasts and plants)from lower yeasts to higher *** wraps unwanted organelles and damaged proteins in a double-membrane structure to transport them to vacuoles for degradation and *** plants,autophagy functions in adaptation to the environment and maintenance of growth and *** review systematically describes the autophagy process,biological functions,and regulatory mechanisms occurring during plant growth and development and in response to abiotic *** provides a basis for further theoretical research and guidance of agricultural production.

关键词： Autophagy Function Mechanism Development abiotic stresses

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Involvement of Histone Modifcations in Plant abiotic Stress Responses

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Journal of Integrative Plant Biology 2013年第10期55卷 892-901页

作者： Lianyu Yuan Xuncheng Liu Ming Luo Songguang Yang Keqiang Wu Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical Garden the Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Plant Biology College of Life Science National Taiwan University

As sessile organisms, plants encounter various environmental stimuli including abiotic stresses during their lifecycle. To survive under adverse conditions, plants have evolved intricate mechanisms to perceive external signals and respond accordingly. Responses to various stresses largely depend on the plant capacity to modulate the transcriptome rapidly and specifically. A number of studies have shown that the molecular mechanisms driving the responses of plants to environmental stresses often depend on nucleosome histone post-translational modifications including histone acetylation, methylation, ubiquitination, and phosphorylation. The combined effects of these modifications play an essential role in the regulation of stress responsive gene expression. In this review, we highlight our current understanding of the epigenetic mechanisms of histone modifications and their roles in plant ahiotic stress response.

关键词： abiotic stresses gene regulation histone modifications,

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Foci of Future Studies on abiotic Stress Tolerance of Maize in the Era of Post-Genomics

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Journal of Integrative Agriculture 2012年第8期11卷 1236-1244页

作者： LI You-zhi FAN Xian-wei LIAO Jiang-xiong State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Ministry of Science and Technology/Key Laboratory of Microbial and Plant Genetic Engineering Ministry of Education/College of Life Science and Technology Guangxi University Guangxi 530005 P.R. China Sugarcane Research Center Chinese Academy of Agriculture Sciences Guangxi 530007 P.R.China

Genetic and metabolic engineering approaches are powerful tools for improving the tolerance of maize to abiotic stresses because they are faster and can afford greater control over agronomically useful traits. However, in-depth understanding of the molecular mechanisms controlling response to abiotic stresses is the prerequisite for successful implementation of these strategies. A great flaw to dissect the biological mechanisms by genome sequencing is that genome sequencing approach could not reflect real-time molecular actions of plants especially under the stresses because the living organisms rarely live in unchanging environments. Post-genomics such as transcriptomics, metabolomics, and proteomics can generate knowledge that is closer to the biological processes. With the development of post-genomics, it can be expected that voluminous data will be generated. This paper proposes that future research on maize stress tolerance in the era of post-genomics should focus on metabolomics and proteomics; stress tolerance of whole plant rather than individual tissues or organs; coordination of expression of genes among tissues; characterization of promoters of stress-responsive genes; interrelation between mechanisms for tolerance to, and growth recovery from the stress; hexose metabolism as well as the glycolysis pathway; and foundation genotypes.

关键词： maize abiotic stresses research foci era of post-genomics

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