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Transporter-Mediated Nuclear Entry of Jasmonoyl-lsoleucine Is Essential for Jasmonate Signaling

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Molecular plant 2017年第5期10卷 695-708页

作者： Qingqing Li Jian Zheng Shuaizhang Li Guanrong Huang Stephen J. Skilling Lijian Wang Ling Li Mengya Li Lixing Yuan Pei Liu department of Ecology department of plant nutrition College of Resources and Environmental Sciences China Agricultural University Beijing 100193 P. R. China

To control gene expression by directly responding to hormone concentrations, both animal and plant cells have exploited comparable mechanisms to sense small-molecule hormones in nucleus. Whether nuclear entry of these hormones is actively transported or passively diffused, as conventionally postulated, through the nuclear pore complex, remains enigmatic. Here, we identified and characterized a jasmonate transporter in Arabidopsis thaliana, AtJAT1/AtABCG16, which exhibits an unexpected dual localization at the nuclear envelope and plasma membrane. We show that AtJAT1/AtABCG16 controls the cytoplasmic and nuclear partition of jasmonate phytohormones by mediating both cellular efflux of jasmonic acid （JA） and nuclear influx of jasmonoyl-isoleucine （JA-Ile）, and is essential for maintaining a critical nuclear JA-Ile concentration to activate JA signaling. These results illustrate that transporter-mediated nuclear entry of small hormone molecules is a new mechanism to regulate nuclear hormone signaling. Our findings provide an avenue to develop pharmaceutical agents targeting the nuclear entry of small molecules.

关键词： jasmonate transporter jasmonic acid jasmonoyl-isoleucine nuclear import AtJAT1/AtABCG16

Spatial and Temporal Quantitative Analysis of Cell Division and Elongation Rate in Growing Wheat Leaves under Saline Conditions

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Journal of Integrative plant Biology 2008年第1期50卷 76-83页

作者： Urs Schmidhalter Chair of plant nutrition Technical University of MunichFreising D-85350Germany

Leaf growth in grasses is determined by the cell division and elongation rates, with the duration of cell elongation being one of the processes that is the most sensitive to salinity. Our objective was to investigate the distribution profiles of cell production, cell length and the duration of cell elongation in the growing zone of the wheat leaf during the steady growth phase. plants were grown in loamy soil with or without 120 mmollL NaCI in a growth chamber, and harvested at day 3 after leaf 4 emerged. Results show that the elongation rate of leaf 4 was reduced by t20 mmollL NaCI during the steady growth phase. The distribution profile of the lengths of abaxial epidermal cells of leaf 4 during the steady growth stage shows a sigmoidal pattern along the leaf axis for both treatments. Although salinity did not affect or even increased the length of the epidermal cells in some locations in the growth zone compared to the control treatment, the final length of the epidermal cells was reduced by 14% at 120 mmollL NaCI. Thus, we concluded that the observed reduction in the leaf elongation rate derived in part from the reduced cell division rate and either the shortened cell elongation zone or shortened duration of cell elongation. This suggests that more attention should be paid to the effects of salinity on those properties of cell production and the period of cell maturation that are related to the properties of cell wall.

关键词： cell production epidermal cell length growth zone relative elemental growth rate salinity wheat.

The Sulfate Transporter Family in Wheat： Tissue-Specific Gene Expression in Relation to nutrition

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Molecular plant 2010年第2期3卷 374-389页

作者： Peter Buchner Saroj Parmar Anne Kriegel Magali Carpentier Malcolm J. Hawkesford Rothamsted Research Plant Science Department West Common Harpenden Hertfordshire AL5 2JQ UK Molecular plant nutrition University of Hohenheim Stuttgart Germany

Sulfate uptake and distribution in plants are managed by the differential expression of a family of transporters, developmentally, spatially, and in response to sulfur nutrition. Elucidation of the signaling pathways involved requires a knowledge of the component parts and their interactions. Here, the expression patterns of the full complement of sulfate transporters in wheat, as influenced by development and sulfur nutrition, are described. The 10 wheat sulfate transporters characterized here are compared to the gene families for both rice and Brachypodium, for whom full genome information is available. Expression is reported in young seedlings with a focus on roles in uptake from nutrient solution and differential expression in relation to sulfate deprivation. In addition, patterns of expression in all organs at the grain filling stage are reported and indicate differential responses to nutritional signals of the individual transporters in specific tissues and an overall coordination of uptake, storage, and remobilization to deliver sulfur to the developing grain.

关键词： Sulfate transporter wheat transcriptional regulation sulfur nutrition grain filling.

The transformation of agriculture in China: Looking back and looking forward

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Journal of Integrative Agriculture 2018年第4期17卷 755-764页

作者： JIAO Xiao-qiang Nyamdavaa Mongol ZHANG Fu-suo Center for Resources Environment and Food Security Department of Plant Nutrition/Key Laboratory of Plant-Soil InteractionsMinistry of Education China Agricultural University Lancaster Environment Centre Lancaster University

China’s grain yield increased from 1 t hain 1961 to 6 t hain 2015, while successfully feeding not only its large population but also supplying agricultural products all over the world. These achievements were greatly supported by modern technology and distinct governmental policy. However, China’s grain production has been causing a number of problems mainly related to declining natural resources and a lack of environmental protection. Due to the growing population and changing dietary requirements, increasing food production must be achieved by increasing resource use efficiency while minimizing environmental costs. We propose two novel development pathways that can potentially sustain agricultural crop production in the next few decades:(i) enhancing nutrient use efficiency with zero increase in chemical fertilizer input until 2020 and(ii) concurrently increasing grain yield and nutrient use efficiency for sustainable intensification with integrated nutrient management after 2020. This paper provides a perspective on further agricultural developments and challenges, and useful knowledge of our valuable experiences for other developing countries.

关键词： food security sustainable development agriculture grain production

Effectiveness of 3,4-Dimethylpyrazole Phosphate as Nitrification Inhibitor in Soil as Influenced by Inhibitor Concentration,Application Form, and Soil Matric Potential

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Pedosphere 2008年第3期18卷 378-385页

作者： G.BARTH S.VON TUCHER U.SCHMIDHALTER Chair of plant nutrition Technical University MunichD-85350 Freising-Weihenstephan(Germany)

The efficacy of nitrification inhibitors depends on soil properties and environmental conditions. The nitrification inhibitor 3.4-dimethylpyrazole phosphate （DMPP） was investigated in a sandy loam and a loamy soil to study its effectiveness as influenced by inhibitor concentration, application form, and soil matric potential. DMPP was applied with concentrations up to 34.6 mg DMPP kg^-1 soil as solution or as ammonium-sulfate/ammonium-nitrate granules formulated with DMPP. DMPP inhibited the oxidation of ammonium in both soils, but this effect was more pronounced in the sandy loam than in the loamy soil. When applied as solution, increasing DMPP concentrations up to 7 mg DMPP kg^-1 soil had no influence on the inhibition. The effectiveness of DMPP formulated as fertilizer granules was superior to the liquid application of DMPP and NH4^＋, particularly in the loamy soil. Without DMPP, a decline in soil matric potential down to -600 kPa decreased nitrification in both soils, but this effect was more pronounced in the sandy loam than in the loamy soil. DMPP was most effective in the sandy loam particularly under conditions of higher soil moisture, i.e., under conditions favorable for nitrate leaching.

关键词： 3,4-dimethylpyrazole phosphate DMPP fertilizer granules nitrification inhibitor

Involvement of Plasma Membrane H+-ATPase in Adaption of Rice to Ammonium Nutrient

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Rice science 2011年第4期18卷 335-342页

作者： Yi-yong ZHU Juan LIAN Hou-qing ZENG Liu GAN Ting-jun DI Qi-rong SHEN Guo-hua XU department of plant nutrition College of Resources and Environmental Sciences Nanjing 210095 China

The preference of paddy rice for NH4+ rather than NO3ˉ is associated with its tolerance to low pH since a rhizosphere acidification occurs during NH4+ ***,the adaptation of rice root to low pH has not been fully *** plasma membrane H+-ATPase is a universal electronic H+ pump,which uses ATP as energy source to pump H+ across the plasma membranes into the *** key function of this enzyme is to keep pH homeostasis of plant cells and generate a H+ electrochemical gradient,thereby providing the driving force for the active influx and efflux of ions and metabolites across the plasma *** study investigated the acclimation of plasma membrane H+-ATPase of rice root to low *** mechanism might be partly responsible for the preference of rice plants to NH4+ nutrition.

关键词： rice ammonium nutrient plasma membrane H+-ATPase

A new hybrid approach to assessing soil quality using neutrosophic fuzzy-AHP and support vector machine algorithm in sub-humid ecosystem

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Journal of Mountain Science 2023年第11期20卷 3186-3202页

作者： ÖZKAN Barış DENGIZ Orhan ALABOZ Pelin KAYA NursaçSerda department of Industrial Engineering Faculty of EngineeringOndokuz Mayis UniversitySamsun 55200Türkiye department of Soil Sciences and plant nutrition Faculty of AgricultureOndokuz Mayis UniversitySamsun 55200Türkiye department of Soil Science and plant nutrition Faculty of AgricultureIsparta University of Applied SciencesIsparta32000Türkiye

Soil quality determination and estimation is an important issue not only for terrestrial ecosystems but also for sustainable management of *** this study,soil quality was determined by linear and nonlinear standard scoring function methods integrated with a neutrosophic fuzzy analytic hierarchy process in the micro *** addition,soil quality values were estimated using a support vector machine(SVM)in machine learning *** order to generate spatial distribution maps of soil quality indice values,different interpolation methods were evaluated to detect the most suitable semivariogram *** the soil quality index values obtained by the linear method were determined between 0.458-0.717,the soil quality index with the nonlinear method showed variability at the levels of *** was no statistical difference between the two methods,and they were determined to be *** the estimation of soil quality with SVM,the normalized root means square error(NRMSE)values obtained in the linear and nonlinear method estimation were determined as 0.057 and 0.047,*** spherical model of simple kriging was determined as the interpolation method with the lowest RMSE value in the actual and predicted values of the linear method while,in the nonlinear method,the lowest error in the distribution maps was determined with exponential of the simple kriging.

关键词： Soil quality Support vector machine Neutrosophic fuzzy Humid ecosystem

Reproducibility and Validity of a Chinese Food Frequency Questionnaire

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Biomedical and Environmental Sciences 2010年第S1期23卷 1-38页

作者： Water WILLETT Kyoko HASEGAWA department of nutrition Harvard School of Public Health Kagawa nutrition University

Objectives This study was design to develop a semi-quantitative Chinese Food Frequency Questionnaire （FFQ） and to conduct a validation study for the questionnaire. Methods Based on the survey experience in recent years, a new Chinese food frequency questionnaire （FFQ） with 149 items in 17 food categories was developed. A validation study on this new FFQ was conducted in Jiangsu and Beijing of China between 1999 and 2001. The period of study covered 1 year and the FFQ was validated by comparing with data obtained by a six repeated 24-hour recalls for 3 consecutive days, or a totally 18-day 24- hour recall throughout the year. A total of 271 healthy adult subjects were enrolled in the study. Food and nutrient intakes measured by the 18-day dietary recalls and food frequency questionnaires （FFQs） were computed in the National Institute for nutrition and Food Safety, China CDC using the existing nutrition database. The average daily intake of foods and nutrients over the 18-day recall was used to compare with FFQ1 and FFQ2, which was conducted at the beginning and the end of the year, respectively. All statistical analyses were carried out using SAS software version 6.12.

关键词： FFQ Reproducibility and Validity of a Chinese Food Frequency Questionnaire

The impact of space environment on gene expression in Arabidopsis thaliana seedlings

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Science China(Technological Sciences) 2017年第6期60卷 902-910页

作者： LI HuaSheng LU JinYing ZHAO Hui SUN Qiao YU FuTong PAN Yi CHEN Yu SU Liang LIU Min Space Molecular Biological Laboratory China Academy of Space Technology department of plant nutrition China Agricultural University Institute of Genetics and Developmental Biology Chinese Academy of Sciences

One of the important questions in space biology is the mechanisms underlying plant responses to an outer space environment,i.e.,how gene expression is altered in *** this study,the transcriptome of Arabidopsis thaliana seedlings was analyzed as a part of Germany SIMBOX(science in microgravity box)spaceflight experiment on Shenzhou 8 *** experiment involved the following treatments:spaceflight with microgravity(Fμg),spaceflight with 1g centrifugal force(F 1g),and ground 1g control(G 1g).Gene chips were used to screen gene expression differences in Arabidopsis thaliana seedlings among these *** analysis revealed that 621 genes were differentially expressed in samples Fμg vs.G 1g,249 genes in samples F 1g vs.G 1g,and 368 genes in samples Fμg vs.F *** ontology analysis indicated that the genes were involved in metabolism of stress response,gravitropic response,and DNA damage and repair,suggesting that plants adjust these metabolic pathways to space environmental stress,microgravity,and radiation.

关键词： Arabidopsis thaliana space flight microgravity microarray gene expression profile