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Transcriptional activation and phosphorylation of OsCNGC9 confer enhanced chilling tolerance in rice

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molecular plant 2021年第2期14卷 315-329页

作者： Jiachang Wang Yulong Ren Xi Liu Sheng Luo Xiao Zhang Xin Liu Qibing Lin Shanshan Zhu Hua Wan Yang Yang Yu Zhang Bin Lei Chunlei Zhou Tian Pan Yongfei Wang Mingming Wu Ruonan jing Yang Xu Meng Han Fuqing Wu Cailin Lei Xiuping Guo Zhijun Cheng Xiaoming Zheng Yihua Wang Zhigang Zhao Ling Jiang Xin Zhang Yong-Fei Wang Haiyang Wang Jianmin Wan National key laboratory for Crop Genetics and Germplasm Enhancement Jiangsu Plant Gene Engineering Research CenterNanjing Agricultural UniversityNanjing 210095China National key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China National key laboratory of plant molecular Genetics Institute of Plant Physiology and EcologyCAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China MOE key laboratory of Bioinformatics School of Life SciencesTsinghua UniversityBeijing100084China

Low temperature is a major environmental factor that limits plant growth and *** transient elevation of cytoplasmic calcium has long been recognized as a critical signal for plant cold tolerance,the calcium channels responsible for this process have remained largely *** we report that OsCNGC9,a cyclic nucleotide-gated channel,positively regulates chilling tolerance by mediating cytoplasmic calcium elevation in rice(Oryza sativa).We showed that the loss-of-function mutant of OsCNGC9 is defective in cold-induced calcium influx and more sensitive to prolonged cold treatment,whereas OsCNGC9 overexpression confers enhanced cold ***,we demonstrated that in response to chilling stress,OsSAPK8,a homolog of Arabidopsis thaliana OST1,phosphorylates and activates OsCNGC9 to trigger Ca2+***,we found that the transcription of OsCNGC9 is activated by a rice dehydration-responsive element-binding transcription factor,*** together,our results suggest that OsCNGC9 enhances chilling tolerance in rice through regulating cold-induced calcium influx and cytoplasmic calcium elevation.

关键词： OsCNGC9 OsSAPK8 OsDREB1A cold signaling transduction chilling tolerance

Dynamic changes of phosphatidylinositol and phosphatidylinositol 4-phosphate levels modulate H^(+)-ATPase and Na^(+)/H^(+) antiporter activities to maintain ion homeostasis in Arabidopsis under salt stress

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molecular plant 2021年第12期14卷 2000-2014页

作者： Yongqing Yang Xiuli Han Liang Ma Yujiao Wu Xiao Liu Haiqi Fu Guoyong Liu Xiaoguang Lei Yan Guo State key laboratory of plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China College of Life Sciences Shandong University of TechnologyZibo 255049China Beijing National laboratory for molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Centerand Peking-Tsinghua Center for Life SciencesPeking UniversityBeijing 100871China

plant metabolites are dynamically modified and distributed in response to environmental ***-ever,it is poorly understood how metabolic change functions in plant stress *** ion ho-meostasis under salt stress requires coordinated activation of two types of central regulators:plasma membrane(PM)H^(+)-ATPase and Na^(+)/H^(+) *** this study,we used a bioassay-guided isolation approach to identify endogenous small molecules that affect PM H^(+)-ATPase and Na^(+)/H^(+) antiporter activities and identified phosphatidylinositol(PI),which inhibits PM H^(+)-ATPase activity under non-stress conditions in Arabidopsis by directly binding to the C terminus of the PM H^(+)-ATPase *** salt stress,the phosphatidylinositol 4-phosphate-to-phosphatidylinositol(PI4P-to-PI)ratio increased,and PI4P bound and activated the PM Na^(+)/H^(+) *** prefers binding to the inactive form of PM H^(+)-ATPase,while PI4P tends to bind to the active form of the Na^(+)/H^(+) *** with this,pis1 mutants,with reduced levels of PI,displayed increased PM H^(+)-ATPase activity and salt stress toler-ance,while the pi4kβ1 mutant,with reduced levels of PI4P,displayed reduced PM Na^(+)/H^(+) antiporter activity and salt stress ***,our results reveal that the dynamic change between PI and PI4P in response to salt stress in Arabidopsis is crucial for maintaining ion homeostasis to protect plants from un-favorable environmental conditions.

关键词： Arabidopsis thaliana endogenous small molecules H^(+)-ATPase Na^(+)/H^(+)antiporter salt stress

molecular basis of heading date control in rice

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aBIOTECH 2020年第4期1卷 219-232页

作者： Hua Wei Xiling Wang Hang Xu Lei Wang key laboratory of plant molecular Physiology CAS Center for Excellence in Molecular Plant SciencesInstitute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China

Flowering time is of great significance for crop reproduction,yield,and regional adaptability,which is intricately regulated by various environmental cues and endogenous *** approaches in Arabidopsis have revealed the elaborate underlying mechanisms of sensing the dynamic change of photoperiod via a coincidence between light signaling and circadian clock,the cellular time keeping system,to precisely control photoperiodic flowering time,and many other signaling pathways including internal hormones and external temperature *** studies in rice(Oryza sativa.),one of the short-day plants(SDP),have uncovered the multiple major genetic components in regulating heading date,and revealed the underlying mechanisms for regulating heading *** we summarize the current progresses on the molecular basis for rice heading date control,especially focusing on the integration mechanism between photoperiod and circadian clock,and epigenetic regulation and heading procedures in response to abiotic stresses.

关键词： Heading date Rice Photoperiod Circadian clock Epigenetic modification Abiotic stress

Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure

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Journal of environmental Sciences 2015年第4期27卷 252-258页

作者： Yu Zhang Zhimin Chen Wei An Shumin Xiao Hongying Yuan Dongqing Zhang Min Yang State key laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Tianjin key laboratory of Aquatic Science and Technology Tianjin Chengjian University

Membrane bioreactors（MBR） are highly efficient at intercepting particles and microbes and have become an important technology for wastewater reclamation. However, many pathogens can accumulate in activated sludge due to the long residence time usually adopted in MBR, and thus may pose health risks when membrane integrity problems *** study presents data from a survey on the occurrence of water-borne Giardia pathogens in reclaimed water from a full-scale wastewater treatment plant with MBR experiencing membrane integrity failure, and assessed the associated risk for green space irrigation. Due to membrane integrity failure, the MBR effluent turbidity varied between 0.23 and 1.90 NTU over a period of eight months. Though this turbidity level still met reclaimed water quality standards（≤ 5 NTU）, Giardia were detected at concentrations of 0.3 to 95 cysts/10 L, with a close correlation between effluent turbidity and Giardia concentration. All β-giardin gene sequences of Giardia in the WWTP influents were genotyped as Assemblages A and B, both of which are known to infect humans. An exponential dose–response model was applied to assess the risk of infection by Giardia. The risk in the MBR effluent with chlorination was9.83 × 10-3, higher than the acceptable annual risk of 1.0 × 10^-4. This study suggested that membrane integrity is very important for keeping a low pathogen level, and multiple barriers are needed to ensure the biological safety of MBR effluent.

关键词： Giardia Reclaimed water Water quality Risk Genotype

RAF22,ABI1 and OST1 form a dynamic interactive network that optimizes plant growth and responses to drought stress in Arabidopsis

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molecular plant 2022年第7期15卷 1192-1210页

作者： Zhihui Sun Zhenkai Feng Yanglin Ding Yuanpeng Qi Shan Jiang Zhen Li Yu Wang Junsheng Qi Chunpeng Song Shuhua Yang Zhizhong Gong State key laboratory of plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Collaborative Innovation Center of Crop stress Biology Institute of Plant Stress BiologyHenan UniversityKaifeng 475001China School of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaoding 100193China

plants adapt to their ever-changing environment via positive and negative signals induced by environmental *** stress,for instance,induces accumulation of the plant hormone abscisic acid(ABA),triggering ABA signal ***,the molecular mechanisms for switching between plant growth promotion and stress response remain poorly *** we report that RAF(rapidly accelerated fibrosarcoma)-LIKE MITOGEN-ACTIVATED PROTEIN KINASE KINASE KINASE 22(RAF22)in Arabidopsis tha/iana physically interacts with ABA INSENSITIVE 1(ABl1)and phosphorylates ABl1 at Ser416 residue to enhance its phosphatase ***,ABl1 can also enhance the activity of RAF22 through dephosphorylation,reciprocally inhibiting ABA signaling and promoting the maintenance of plant growth under normal *** drought stress,however,the ASA-activated OPEN STOMATA1(OST1)phosphorylates the Ser81 residue of RAF22 and inhibits its kinase activity,restraining its enhancement of ABl1 *** together,our study reveals that RAF22,ABl1,and OST1 form a dynamic regulatory network that plays crucial roles in optimizing plant growth and environmental adaptation under drought stress.

关键词： ABA signaling RAF22 ABl1 OST1 phosphorylation

Root growth in response to nitrogen supply in Chinese maize hybrids released between 1973 and 2009

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Science China(Life Sciences) 2011年第7期54卷 642-650页

作者： WU QiuPing CHEN FanJun CHEN YanLing YUAN LiXing ZHANG FuSuo MI GuoHua key laboratory of plant-Soil Interaction MOE College of Resources and Environmental Science China Agricultural University Beijing 100193 China

Root growth has a fundamental role in nitrogen （N） use efficiency. Nevertheless, little is known about how modem breeding progress has affected root growth and its responses to N supply. The root and shoot growth of a core set of 11 representative Chinese maize （Zea mays L.） hybrids released between 1973 and 2009 were investigated under high N （4 mmol L^-1, HN） and low N （0.04 mmol L^-1, LN） levels in a solution culture system. Compared with LN, HN treatment decreased root dry weight （RDW）, the root： shoot ratio （R/S）, and the relative growth rate for root dry weight （RGRroot）, but increased the total root length （TRL） and the total lateral root length （LRL）. The total axial root length （ARL） per plant was reduced under HN, mostly in hybrids released before the 1990s. The number of seminal roots （SRN） was largely unaffected by different N levels. More recently released hybrids showed higher relative growth rates in the shoot under both HN and LN. However, the roots only showed increased RGR under HN treatment. Correspondingly, there was a positive linear relationship with the year of hybrid release for TRL, LRL and ARL under HN treatment. Together, these results suggest that while shoot growth of maize has improved, its root growth has only improved under high N conditions over the last 36 years of selective breeding in China. Improving root growth under LN conditions may be necessary to increase the N use efficiency of maize.

关键词： Root R/S ratio nitrogen relative growth rate maize breeding

Regulation of Actin Dynamics in Pollen Tubes:Control of Actin Polymer Level

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Journal of Integrative plant Biology 2009年第8期51卷 740-750页

作者： Naizhi Chen Xiaolu Qu Youjun Wu Shanjin Huang Center for Signal Transduction and Metabolomics Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Actin cytoskeleton undergoes rapid reorganization in response to internal and external cues. How the dynamics of actin cytoskeleton are regulated, and how its dynamics relate to its function are fundamental questions in plant cell biology. The pollen tube is a well characterized actin-based cell morphogenesis in plants. One of the striking features of actin cytoskeleton characterized in the pollen tube is its surprisingly low level of actin polymer. This special phenomenon might relate to the function of actin cytoskeleton in pollen tubes. Understanding the molecular mechanism underlying this special phenomenon requires careful analysis of actin-binding proteins that modulate actin dynamics directly. Recent biochemical and biophysical analyses of several highly conserved plant actin-binding proteins reveal unusual and unexpected properties, which emphasizes the importance of carefully analyzing their action mechanism and cellular activity. In this review, we highlight an actin monomer sequestering protein, a barbed end capping protein and an F-actin severing and dynamizing protein in plant. We propose that these proteins function in harmony to regulate actin dynamics and maintain the low level of actin polymer in pollen tubes.

关键词： actin-binding proteins actin dynamics pollen tube

Cis-12-Oxo-Phytodienoic Acid Stimulates Rice Defense response to a Piercing-Sucking Insect

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molecular plant 2014年第11期7卷 1683-1692页

作者： Hui-Min Guo Hai-Chao Li Shi-Rong Zhou Hong-Wei Xue Xue-Xia Miao key laboratory of Insect Developmental and Evolutionary Biology Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China National key laboratory of plant molecular Genetics Institute of plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China

The brown planthopper （BPH, Nilaparvata lugens） is a destructive, monophagous, piercing-sucking insect pest of rice. Previous studies indicated that jasmonic acid （JA） positively regulates rice defense against chewing insect pests but negatively regulates it against the piercing-sucking insect of BPH. We here demonstrated that overexpression of allene oxide cyclase （AOC） but not OPR3 （cis-12-oxo-phytodienoic acid （OPDA） reductase 3, an enzyme adjacent to AOC in the JA synthetic pathway） significantly increased rice resistance to BPH, mainly by reducing the feeding activity and survival rate. Further anal- ysis revealed that plant response to BPH under AOC overexpression was independent of the JA pathway and that significantly higher OPDA levels stimulated rice resistance to BPH. Microarray analysis identified multiple candidate resistance-related genes underAOCoverexpression. OPDA treatment stimulated the resistance of radish seedlings to green peach aphid Myzus persicae, another piercing-sucking insect. These results imply that rice resistance to chewing insects and to sucking insects can be enhanced simultaneously through AOC-mediated increases of JA and OPDA and provide direct evidence of the potential application of OPDA in stimulating plant defense responses to piercing-sucking insect pests in agriculture.

关键词： brown planthopper allene oxide cyclase cis-12-oxo-phytodienoic acid OPDA reductase 3 jasmonic acid.

Comprehensive Characteristics of MicroRNA Expression Profile Conferring to Rhizoctonia solani in Rice

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Rice science 2020年第2期27卷 101-112页

作者： CAO Wenlei CAO Xinxin ZHAO Jianhua ZHANG Zhaoyang FENG Zhiming OUYANG Shouqiang ZUO Shimin Jiangsu key laboratory of Crop Genetics and Physiology/key laboratory of plant Functional Genomics of the Ministry of education/Jiangsu key laboratory of Crop Genomics and molecular Breeding Agricultural CollegeYangzhou UniversityYangzhou 225009China College of Horticulture and plant Protection Yangzhou UniversityYangzhou 225009China Joint International Research laboratory of Agriculture and Agri-Product Safety Yangzhou UniversityYangzhou 225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou 225009China

MicroRNAs(miRNAs)are about 22 nucleotides regulatory non-coding RNAs that play versatile roles in reprogramming plant responses to biotic and abiotic ***,it remains unknown whether miRNAs confer the resistance to necrotrophic fungus Rhizoctonia solani in *** investigate whether miRNAs regulate the resistance to ***,we constructed 12 small RNA libraries from susceptible and resistant rice cultivars treated with water/pathogen at 5 h post inoculation(hpi),10 hpi and 20 hpi,*** taking the advantage of next-generation sequencing,we totally collected 400–450 known miRNAs and 450–620 novel miRNAs from the *** analysis of miRNAs demonstrated different patterns for known and novel miRNAs upon *** ***-four miRNA families were identified to be expressed specifically in rice,and most of them were involved in plant disease resistance.A particular Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis result revealed that a great majority of target genes of regulated miRNAs belonged to the pathway of plant-pathogen ***,miR444b.2,miR531a,mir1861i,novel_miR1956 and novel_miR135 conferred response to *** infection confirmed by Northern *** global understanding of miRNA profiling revealed that the regulation of miRNAs may be implicated in the control of rice immunity to *** of the expression of miRNAs will offer the community with a direction to generate appropriate strategies for controlling rice sheath blight disease.

关键词： rice microRNA sheath blight disease resistance transcriptomics