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中国细胞生物学学会2005年学术大会、青年学术研讨会

作者： guanghui yu, mengxiang sun key laboratory of moe for plant developmental biology, college of life sciences, wuhan university, wuhan 430072

γ-amino-butyrate acid (GABA) is a four-carbon nonprotein amino acid. It is ubiquitous in all the organisms, from prokaryotes to eukaryotes. To elucidate its role in pollen tube growth, exogenous GABA and its analogs (Baclofen and 3-MPA) were used in our experiment. Our results showed that the exogenous GABA can promote the growth of Nicotiana tabacum pollen tubes at the optimum concentration. The biphasic role of exogenous GABA on the promotion of pollen tubes is reminiscent of role of plant hormone. To explore whether the enhancement role of exogenous GABA on the pollen tubes is via the GABA receptors or not, the animal GABAb receptors agonist Baclofen was used in the experiment. 5×10-4mol/L Baclofen markedly enhance the growth of tobacco pollen tubes after 9h cultivation . The combining effect of exogenous GABA and Baclofen on the growth of pollen tubes was also observed. It is tempted to speculate that the promotion role of exogenous GABA on the pollen tube growth is via the GABAB receptor, though the corresponding gene has not been cloned in the plants. 3-Mercaptopropionic acid (3-MPA) is another analog of GABA. It is a competitive, relatively specific inhibitor of glutamate decarboxylase (GAD, EC 4.***.1.15). The enzyme catalyzes the formation of endogenous GABA from glutamate. In the pollen germination medium supplement with 5×10-4 mol/L MPA, pollen tubes growth was obviously inhibited, but the inhibition could be relieved by 10-3 mol/L exogenous GABA. Our data showed that the endogenous GABA production is crucial to the pollen tube growth and the process is regulated by exogenous and endogenous GABA via different signal pathways. Futhermore, the GABA receptors on the membrane of pollen tubes were primary indicated by the semiconductor quantum dots (QDs) tagged ligands.

关键词： GABA is involved in the regulation of Nicotiana tabacum pollen tube growth

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Identification of propranolol and derivatives that are chemical inhibitors of phosphatidate phosphatase as potential broad-spectrum fungicides

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plant Communications 2024年第1期5卷 215-230页

作者： Juan Zhao yu Chen Zhifen Ding Yaru Zhou Ruiqing Bi Ziting Qin Lei Yang Peng sun Qiping sun Guang Chen Daiyuan sun Xianya Jiang Lu Zheng Xiao-Lin Chen Hu Wan guanghui Wang Qiang Li Huailong Teng Guotian Li National key laboratory of Agricultural Microbiology Hubei Hongshan LaboratoryHubei Key Laboratory of Plant PathologyThe Center of Crop NanobiotechnologyHuazhong Agricultural UniversityWuhan 430070China college of Science Huazhong Agricultural UniversityWuhan 430070China National key laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China State key laboratory of Crop Stress biology for Arid Areas College of Plant ProtectionNorthwest A&F UniversityYangling 712100China college of Chemistry and life sciences Sichuan Provincial Key Laboratory for Development and Utilization of Characteristic Horticultural Biological ResourcesChengdu Normal UniversityChengdu 611130China Yangjiang Institute of Agricultural sciences Yangjiang 529500China

plant diseases cause enormous economic losses in agriculture and threaten global food security,and application of agrochemicals is an important method of crop disease *** of disease-resis-tance mechanisms and synthesis of highly bioactive agrochemicals are thus important research ***,we show that propranolol,a phosphatidate phosphatase(Pah)inhibitor,effectively suppresses fungal growth,sporulation,sexual reproduction,and infection of diverse *** MoPah1 enzyme activity of the rice blast fungus Magnaporthe oryzae is inhibited by *** in lipid metabolism are associated with inhibited hyphal growth and appressorium formation caused by propranolol in *** inhibits a broad spectrum of 12 plant pathogens,effectively inhibiting infection of barley,wheat,maize,tomato,and *** improve antifungal capacity,we synthesized a series of propranolol derivatives,one of which shows a 16-fold increase in antifungal ability and binds directly to *** and its derivatives can also reduce the severity of rice blast and Fusarium head blight of wheat in *** together,our results demonstrate that propranolol suppresses fungal development and infection through mechanisms involved in lipid *** and its derivatives may therefore be promising candidates for fungicide development.

关键词： propranolol molecular design chemical modification virulence lipid metabolism Pyricularia oryzae

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Structural changes in the conversion of an Arabidopsis outward-rectifying K+channel into an inward-rectifying channel

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plant Communications 2024年第6期5卷 5-8页

作者： Xudong Gao Xia Xu Tengfei sun yuhan Lu yutian Jia Jiaqi Zhou Peng Fu Yanming Zhang guanghui Yang State key laboratory of plant Environmental Resilience Frontiers Science Center for Molecular Design BreedingDepartment of Nutrition and HealthCollege of Biological SciencesChina Agricultural UniversityBeijing 100193China

Dear Editor,By using cryo-electron microscopy and electrophysiology,this study characterizes the structural and functional dynamics of the K+outward-rectifying channel SKOR in Arabidopsis and the structural changes associated with a double mutation that transforms SKOR into an inward-rectifying K+channel,*** findings have implications for understanding and manipulating crop K+nutrition.

关键词： channel Arabidopsis changes

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Genomic and genic sequence variation in synthetic hexaploid wheat (AABBDD) as compared to their parental species

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Progress in Natural Science:Materials International 2008年第5期18卷 533-538页

作者： Lihong Nie, Zongfu Han, Lahu Lu, Yingyin Yao, Qixin sun, Zhongfu Ni key laboratory of Crop Heterosis and Utilization (moe) and State key laboratory for Agrobiotechnology, key laboratory of Crop Genomics and Genetic Improvement (MOA), Beijing key laboratory of Crop Genetic Improvement, Department of plant Genetics & Breeding, China Agricultural university, Beijing 100094, China key laboratory of Crop Heterosis and Utilization (moe) and State key laboratory for Agrobiotechnology Key Laboratory of Crop Genomics and Genetic Improvement (MOA) Beijing Key Laboratory of Crop Genetic Improvement Department of Plant Genetics & Breeding China Agricultural University Beijing 100094 China

In order to understand the genomic changes during the evolution of hexaploid wheat, two sets of synthetic hexaploid wheat from hybridization between maternal tetraploid wheat (AABB) and paternal diploid goat grass (DD) were used for DNA-AFLP and single strand conformation polymorphism (SSCP) analysis to determine the genomic and genic variation in the synthetic hexaploid wheat. Results indicated that more DNA sequences from paternal diploid species were eliminated in the synthetic hexaploid wheat than from maternal tetraploid wheat, suggesting that genome from parental species of lower ploidity tends to be eliminated preferentially. However, sequence variation detected by SSCP procedure was much lower than those detected by DNA-AFLP, which indicated that much less variation in the genic regions occurred in the synthetic hexaploid wheat, and sequence variations detected by DNA-AFLP could be derived mostly from non-coding regions and repetitive sequences. Our results also indicated that sequence variation in 4 genes can be detected in hybrid F1, which suggested that this type of sequence variation could be resulted from distant hybridization. It was interesting to note that 3 out of the 4 genes were mapped and clustered on the long arm of chromosome 2D, which indicated that variation in genic sequences in synthetic hexaploid wheat might not be a randomized process.

关键词： Synthetic hexaploid wheat Polyploidy Genome Sequence variation

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Oomycete Nudix effectors display WY-Nudix conformation and mRNA decapping activity

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Journal of Integrative plant biology 2024年第8期66卷 1548-1552页

作者： Baodian Guo Qinli Hu Bangwei Wang Deqiang Yao Haonan Wang guanghui Kong Chenyang Han Suomeng Dong Fengquan Liu Weiman Xing yuanchao Wang Department of plant Pathology Nanjing Agricultural UniversityNanjing 210095China Institute of plant Protection Jiangsu Academy of Agricultural SciencesNanjing 210014China Department of Molecular Genetics University of Texas Southwestern Medical CenterDallasTexas 75390USA Institute of Aging&Tissue Regeneration Renji HospitalShanghai Jiao Tong University School of MedicineShanghai 200127China college of Horticulture Nanjing Agricultural UniversityNanjing 210095China college of Agriculture Guizhou UniversityGuiyang 550025China college of life sciences Shanghai Normal UniversityShanghai 200234China

Phytopathogens secrete effectors to promote colonization of their host *** effectors modulate host immune responses by interfering with various pathways,but little is known about their biochemical *** recent reports indicate that some phytopathogen effectors have Nudix hydrolase activity,including Avr3b from Phytophthora sojae(Dong et al.,2011),AvrM14 from Melampsora lini (McCombe et al.,2023),and RipN from Ralstonia solanacearum (sun et al.,2019).

关键词： plants Phytophthora biochemical

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Identification and mapping of quantitative trait loci controlling cold-tolerance of Chinese common wild rice (O. rufipogon Griff.) at booting to flowering stages

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Chinese Science Bulletin 2003年第19期48卷 2068-2071页

作者： LIU Fengxia, sun Chuanqing, TAN Lubin, FU Yongcai, LI Dejun & WANG Xiangkun Department of plant Genetics and Breeding, China Agricultural university, National key laboratory of Agrobiology, key laboratory of Crop Genetic Improvement and Genome of the Ministry of Agriculture, Beijing 100094, China Department of plant Genetics and Breeding China Agricultural University Beijing China National key laboratory of Agrobiology Key Laboratory of Crop Genetic Improvement and Genome of the Ministry of Agriculture Beijing China

An advanced backcross population of rice was used to identify the quantitative trait locus (QTL) controlling the cold-tolerance at booting to flowering stages. The recipient, Guichao 2 (GC2), was a commercial Indica rice; the donor Dongxiang common wild rice, was an accession of common wild rice (DXCWR, Oryza rufipogon Griff.). Three QTLs for cold-tolerance were detected on chromosomes 1, 6 and 11. Two of them coming from DXCWR could enhance the cold-tolerance of the backcross progenies. Moreover, one sterility QTL that could reduce the seed set rate of the backcross progenies by 78% was mapped on chromosome 5.

关键词：耐寒性水稻开花期播种设备回交杂种 QTL分析数量特点轨迹

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Atomic force microscopic view of the fine topography on the tobacco stigma surface during its response to pollination

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Chinese Science Bulletin 2008年第7期53卷 1015-1020页

作者： WU Hui LI Meng sun mengxiang key laboratory of moe for plant developmental biology College of Life Science Wuhan University Wuhan 430072 China Department of Biological Engineering Henan Institute of Science and Technology Xinxiang 453003 China

During compatible pollination in tobacco, an extracellular matrix (ECM) is secreted from the stigma surface; however, it is unknown whether the pattern of secretion across the stigma depends on the pollen source. In fact, technical limitations have prevented clear observation of ECM secretion. Here, we report the detailed topographic changes on the stigma surface that accompanies intraspecies and interspecies pollination in tobacco using contact mode atomic force microscopy (AFM). Our results, which show the dynamics and time course of ECM secretion after pollination, indicate that a certain pattern of secretion already exists on the stigma prior to pollination. Intraspecies induced a two-step response, characterized by topographical changes on the stigma surface several hours after pollina-tion, which was distinct from the pattern of ECM secretion induced by interspecies pollination. This difference was confirmed by root-mean-square analysis, which assessed the roughness of the stigma surface. Our findings indicate that compatible pollination not only induces ECM secretion from the stigma, but also results in a specific distribution of the ECM. Thus, this study demonstrates the pow-erful potential of AFM in studying the pollen-stigma interaction.

关键词：原子动力学烟草制品气门花粉

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The relationship of differential expression of genes in GA biosynthesis and response pathways with heterosis of plant height in a wheat diallel cross

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Chinese Science Bulletin 2009年第16期54卷 3029-3034页

作者： WANG XiuLi1,2, YAO YingYin1,2, PENG HuiRu1,2, ZHANG Yi1,2, LU LaHu1,2, NI ZhongFu1,2 & sun QiXin1,2 1 State key laboratory for Agrobiotechnology, key laboratory of Crop Heterosis and Utilization (moe), key laboratory of Crop Genomics and Genetic Improvement (MOA), and Beijing key laboratory of Crop Genetic Improvement, China Agricultural Univer- sity, Beijing 100193, China 2 National plant Gene Research Centre (Beijing), Beijing 100193, China State key laboratory for Agrobiotechnology Key Laboratory of Crop Heterosis and Utilization (MOE) Key Laboratory of Crop Genomics and Genetic Improvement (MOA) and Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China National plant Gene Research Centre (Beijing) Beijing China

Heterosis in internode elongation and plant height is commonly observed in hybrid plants, but the molecular basis for the increased internode elongation in hybrids is unknown. In this study, midparent heterosis in plant height was determined in a wheat diallel cross involving 16 hybrids and 8 parents, and real-time PCR was used to analyze alterations in gene expression between hybrids and parents. Significant heterosis of plant height and the first internode in length were observed for all 16 hybrids, but the magnitude of heterosis was variable for different cross combinations. Analysis revealed that the heterosis of the first internode was significantly correlated to that of plant height (r = 0.56, P plant height. Real-time PCR analysis exhibited that significant difference in heterosis of gene ex- pression was observed among all cross combinations. Moreover, heterosis of the first internode in length was correlated significantly and positively with expression heterosis of KS, GA3ox2-1, GA20ox2, GA20ox1D, GA-MYB and GID1-1, but significantly and negatively with expression heterosis of GAI and GA2ox-1, which is consistent with our recently proposed model of GAs and heterosis in wheat plant height, suggesting the alteration of GA biosynthesis and response pathways might be responsible for the observed heterosis in plant height.

关键词：基因差异表达杂种优势杂交小麦反应途径生物合成遗传算法株高双列

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Structural Dependence of Competitive Adsorption of Water and Methanol on TiO2 Surfaces

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Chinese Journal of Chemistry 2017年第6期35卷 889-895页

作者： Zhengming Wang Feng Xiong guanghui sun yuekang Jin Weixin Huang Hefei National laboratory for Physical sciences at the Microscale CAS Key Laboratory of Material for Energy Conversion and Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 China

Employing TiO2 anatase （001）-（1 × 4）, futile （110） and futile （011）-（2× 1） single crystal surfaces, we compre- hensively studied the effects of TiO2 surface structures on the competitive adsorption of water and methanol by means of low energy electron diffraction, thermal desorption spectra and X-ray photoelectron spectroscopy. The relative adsorption strengths of chemisorbed methanol and water vary with the TiO2 surface structures and the ad- sorption sites. This leads to TiO2 surface structure-dependent competitive adsorption of water and methanol. The chemisorption of CH3OH on TiO2 anatase （001）-（1 × 4） surface is seldom affected by pre-covered water at low cov- erages but is affected by pre-covered water at high coverages; the chemisorption of CH3OH on TiO2 rutile （110） surface is seldom affected by pre-covered water; and the chemisorption of CH3OH on TiO2 rutile （011）-（2 × 1） sur- face is affected by pre-covered water even at low coverages. These results deepen the fundamental understandings of surface chemistry on TiO2 surfaces.

关键词： surface chemistry model catalysts repulsive interaction attractive interaction replacement

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A plant Programming of the Main Food Crops in China

A Plant Programming of the Main Food Crops in China

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亚洲精细农业与计算机农业应用联合大会

作者： Yaxiong Chen Rui Guo Wenlong Zhao Weihong Zhou Chaojie Jia Guojun sun moe key laboratory of Arid and Grassland Ecology School of life Science Lanzhou university Lanzhou Gansu Province P.R. China 730000

China, like most developing countries, face great challenges from its huge populations, ensuring food security have always been vital because the Chinese government that still thinks of grain as the basis of national economy and political stability. As the farming area is not increased, it is a premier solution to make the best of arable land to increase food production per unit area. However, a number of agricultural lands are not reasonable used. The rational plant programming can not only achieve the optimal use of arable land, and maximize food production and increase economic benefits, but also limit the environment problems which come from the agricultural production of depending on the chemical pesticides and fertilizers. In this study, we collect data of environmental conditions and winter wheat growth associated factors, then, by using the GIS technology we establish spatial database of regional weather, topography, and soil conditions. With GIS-based multi-criteria evaluation （MCE）, maps of the potential distribution of main crops are established. Compared with these maps, the plant programming map is worked out. The area that should be plant common oat was 1 067 844ha, should be plant naked oat was 1 235 643ha, should be planted potato was 1 297 876ha, should be plant spring maize was 2 035 188ha, should be plant spring wheat was 747 329ha, should be plant summer maize was 2 503 685ha and should be plant winter wheat was 1 119 270ha. （Some areas that are located in cross-zone may be suitable for two or more than two crops growth, that is, these crops have the same levels of suitability that was more suitable than the others.） Basing on the plant programming, local farmers are free to choose which kind of crop cultivated. The plant programming of the main food crops in China would be guide for the Government’s macro-control and farmers’ investment, then, the return of investment would be raise and the blind investment would be avoided.

关键词： plant programming MCE suitable area for crops

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