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Integrating MODFLOW and GIS technologies for assessing impacts of irrigation management and groundwater use in the Hetao Irrigation District,Yellow river basin

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Science china(Technological Sciences) 2009年第11期52卷 3257-3263页

作者： xu xu1,2, huang guanhua1,2 & qu zhongyi3 1 center for agriculture water research, china agricultural university, beijing 100083, china 2 Chinese-Israeli International center for research and Training in agriculture, china agricultural university, beijing 100083, china 3 water Conservancy and Civil Engineering College, Inner Mongolia agricultural university, Hohhot 010018, china 1. center for agriculture water research China Agricultural University Beijing 100083 China 2. Chinese-Israeli International center for research and Training in agriculture China Agricultural University Beijing 100083 China 3. water Conservancy and Civil Engineering College Inner Mongolia Agricultural University Hohhot 010018 China

Due to severe water scarcity, water resources used in agricultural sector have been reduced markedly in Hetao irrigation district. Application of water-saving practices (WSps) is required for the sustainable agricultural development. The human activities including WSps and increase of groundwater abstraction can lower down the groundwater table, which is helpful to the salinity control. Meanwhile, an excessively large groundwater table depth may result in negative impact on crop growth and fragile ecological environment. In this paper, the Jiefangzha irrigation system in Hetao irrigation district was selected as a typical area, a groundwater flow model based on ArcInfo Geographic Information System (GIS) was developed and implemented to quantify the effect of human activities on the groundwater system in this area. The preand post-processing of model data was performed efficiently by using the available GIS tools. The time-variant data in boundary conditions was further edited in Microsoft Excel with programs of Visual Basic for Application (VBA). The model was calibrated and validated with independent data sets. Application of the model indicated that it can well describe the effect of human activities on groundwater dynamics in Jiefangzha irrigation system.

关键词： groundwater flow modeling MODFLOW GIS water-saving practices irrigation district

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A multi-colloidal gold immunochromatography assay for rapid and simultaneous detection of 13 herbicides

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Nano research 2024年第9期17卷 8368-8376页

作者： Qianqian Lu Xinxin xu Aihua qu Liqiang Liu Yuzhe Li Maozhong Sun Chuanlai xu Hua Kuang International Joint research Laboratory for Biointerface and Biodetection and School of Food Science and TechnologyJiangnan UniversityWuxi 214122China china National center for Food Safety risk Assessment Beijing 100021China

Herbicide residues in agricultural products can have adverse effects on the environment and human health,therefore,there is an urgent need to establish a sensitive,rapid,and wide-ranging detection *** this study,haptens of phenylurea herbicides(pUs)and sulfonylurea herbicides(SUs)were analyzed and designed based on computational simulation techniques,and two high-performance broad-spectrum monoclonal antibodies against pUs and SUs were *** this basis,a multi-colloidal gold immunochromatography assay(multi-CGIA)was developed to simultaneously detect 13 herbicides in *** visual limit of detection(vLOD)for pUs including diuron,chlortoluron,neburon,chlorbromuron,and linuron was 1-2μg/*** vLOD for SUs including metsulfuron methyl,ethametsulfuron-methyl,sulfometuron-methyl,tribenuron methyl,cinosulfuron,triasulfuron,chlorimuron-ethyl,and chlorsulfuron was 2-10μg/*** results of real sample determination indicated that the multi-CGIA is accurate,stable,and reliable,and adaptable to on-site preliminary screening of actual samples.

关键词： phenylurea herbicides sulfonylurea herbicides monoclonal antibody immunochromatographic assay wheat

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GWAS unravels acid phosphatase ACp2 as a photosynthesis regulator under phosphate starvation conditions through modulating serine metabolism in rice

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plant Communications 2024年第7期5卷 106-119页

作者： Sushuang Liu Zhan xu Jemaa Essemine Yanmin Liu Chundong Liu Feixue Zhang Zubair Iqbal Mingnan qu Jiangsu Key Laboratory of Crop Genetics and physiology/Jiangsu Key Laboratory of Crop Cultivation and physiology Agricultural College of Yangzhou UniversityYangzhou 225009China Department of Life Sciences and Health Huzhou CollegeHuzhou 313000China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Institute of Crop Huzhou Academy of Agricultural SciencesHuzhou 313000China These authors contributed equally to this article

Inorganic phosphorus(pi)deficiency significantly impacts plant growth,development,and photosynthetic *** study evaluated 206 rice accessions from a MiniCore population under both pi-sufficient(pi^(+))and pi-starvation(pi^(-))conditions in the field to assess photosynthetic phosphorus use efficiency(ppUE),defined as the ratio of A_(sat)^(pi^(-))to A_(sat)^(pi^(+)).A genome-wide association study and differential gene expression analyses identified an acid phosphatase gene(ACp2)that responds strongly to phosphate *** and knockout of ACp2 led to a 67%increase and 32%decrease in ppUE,respectively,compared with wild *** of an elite allele A,by substituting the v5 SNp G with A,resulted in an 18%increase in ppUE in gene-edited ACp2 rice *** phosphate-responsive gene pHr2 was found to transcriptionally activate ACp2 in parallel with pHr2 overexpression,resulting in an 11%increase in *** assays indicated that ACp2 primarily catalyzes the hydrolysis of phosphoethanolamine and *** addition,serine levels increased significantly in the ACp2^(vBG)overexpression line,along with a concomitant decrease in the expression of all nine genes involved in the photorespiratory *** of serine enhanced ppUE and reduced photorespiration rates in ACp2 mutants under pi-starvation *** deduce that ACp2 plays a crucial role in promoting photosynthesis adaptation to pi starvation by regulating serine metabolism in rice.

关键词： phosphate starvation GWAS photosynthetic adaption photosynthetic phosphate use efficiency genetic variation SNp rice

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research progress on electrical signals in higher plants

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progress in Natural Science:Materials International 2009年第5期19卷 531-541页

作者： Xiaofei Yana, zhongyi Wang a, Lan huang a, Cheng Wang b, ruifeng Hou b, Zhilong xu b, Xiaojun Qiao b a College of Information and Electrical Engineering, china agricultural university, beijing 100083, china b National Engineering research center for Information Technology in agriculture, beijing 100097, china [a]College of Information and Electrical Engineering China Agricultural University Beijing 100083 China [b]National Engineering Research Center for Information Technology in Agriculture Beijing 100097 China

This review introduces the characteristics of electrical signals in higher plants and their corresponding physiological significance, and describes in detail the impact of environmental factors (e.g. light and temperature) on the electrical potential of the plants. Also, we evaluate the measurement techniques used for electrical signals in plants, including intracellular measurement, extracellular measurement, measurement of the ion channel based on the patch-clamp technique and on the non-invasive microelectrode vibrating probe technique. We also give a brief review of the applications of these methods for investigating electrical signals in plants. The ionic mechanism of electrical activity in plants is then discussed in terms of environmental response in higher plants, and this is used to provide a theoretical basis for quantitative description of the electrical signals in plants. A model for interpretation of the electrical signal mechanisms in higher plants is discussed, but further experiments are required for the verification of this model.

关键词： Ion channel Temperature-induced Light-induced Ion mechanism Measurement technology

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Fabrication of telechelic DNA-bridged food emulsion gel as edible ink for 3D printing

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Food quality and Safety 2024年第1期8卷 158-165页

作者： ruyuan Zhang Hao huang rong Ai Dong Li Yanqun xu Weiwei Jin Zisheng Luo College of Biological Chemical Sciences and Engineering Jiaxing UniversityJiaxingChina College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhouChina College of Ecology Lishui UniversityLishuiChina Ningbo Innovation center Zhejiang UniversityNingboChina Wenzhou Academy of agriculture Science Liuhongqiao Road 1000WenzhouChina Key Laboratory of Agro-products postharvest Handling of Ministry of agriculture and rural Affairs Zhejiang Key Laboratory for Agri-Food ProcessingHangzhouChina

Objectives:Interdroplet interactions affect the properties and textures of *** this study,we creatively introduced telechelic DNA to link oil droplets directly at molecular scale to further improve the viscoelastic properties of *** and Methods:A stable emulsion with 70%oil fraction was prepared by adding 40 mg/mL of whey protein isolate and peach gum polysaccharide complex(WpI–pGp complex).The addition of telechelic DNA(0.125–0.375μmol/L)made the emulsion change from a cream-like state to a self-supporting ***:rheological experiments confirmed that the telechelic DNA could improve the yield stress,storage modulus/loss modulus(Gʹ/Gʹʹ)and apparent viscosity of the emulsion gel in a concentration-dependent manner(0–0.375μmol/L).Inverted fluorescence images clearly showed the interdroplet network of the emulsion gel linked by telechelic *** 3D printing,the emulsion gel with a higher concentration(0.375μmol/L)of telechelic DNA displayed better surface quality and dimensional resolution,indicating improved ***:This study successfully designed a novel telechelic DNA-bridged emulsion gel,which showed great potential as edible ink for 3D printing.

关键词： Telechelic DNA WpI-pGp complex emulsion gel interdroplet interactions 3D printing.

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Identification and effective regulation of scarb1 gene involved in pigmentation change in autotetraploid Carassius auratus

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Zoological research 2024年第2期45卷 381-397页

作者： Xi-Dan xu Yue Zhou Chong-Qing Wang xu huang Kun Zhang Xiao-Wei xu Li-Wen He Xin-Yue Zhang Xin-Zhu Fu Ming Ma Qin-Bo Qin Shao-Jun Liu State Key Laboratory of Developmental Biology of Freshwater Fish Engineering Research Center of Polyploid Fish Reproduction and Breeding of the State Education MinistryCollege of Life SciencesHunan Normal UniversityChangshaHunan 410081China Nansha-South china agricultural university Fishery research Institute GuangzhouGuangdong 511458China Hunan Yuelu Mountain Science and Technology Co.Ltd.for Aquatic Breeding ChangshaHunan 410081China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangshaHunan 410081China

The autotetraploid Carassius auratus(4nrr,4n=200,rrrr)is derived from whole-genome duplication of Carassius auratus red var.(rCC,2n=100,rr).In the current study,we demonstrated that chromatophores and pigment changes directly caused the coloration and variation of 4nrr skin(red in rCC,brownish-yellow in4nrr).To further explore the molecular mechanisms underlying coloration formation and variation in 4nrr,we performed transcriptome profiling and molecular functional verification in rCC and *** revealed that scarb1,associated with carotenoid metabolism,underwent significant down-regulation in *** editing of this candidate pigment gene provided clear evidence of its significant role in rCC ***,we identified four divergent scarb1 homeologs in 4nrr:two original scarb1 homeologs from rCC and two duplicated ***,three of these homeologs possessed two highly conserved alleles,exhibiting biased and allelespecific expression in the ***,after precise editing of both the original and duplicated scarb1homeologs and/or alleles,4nrr individuals,whether singly or multiply mutated,displayed a transition from brownishyellow skin to a cyan-gray ***,the proportional areas of the cyan-gray regions displayed a gene-dose *** findings illustrate the subfunctionalization of duplicated scarb1,with all scarb1genes synergistically and equally contributing to the pigmentation of *** is the first report concerning the functional differentiation of duplicated homeologs in an autopolyploidfish,substantiallyenrichingour understanding of coloration formation and change within this group of organisms.

关键词： Autopolyploidization Coloration change scarb1 Functional differentiation Genetic changes

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The MrE11–ATM–SOG1 DNA damage signaling pathway confers rice immunity to Xanthomonas oryzae

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plant Communications 2024年第4期5卷 194-207页

作者： Zhan xu Mingnan qu Chuanlin Shi Hong Zhang Wu Chen Hongge Qian Zhipeng Zhang Jiehua Qiu Qian Qian Lianguang Shang Guangzhou City Academy of agricultural Sciences Key Laboratory of BiologyGenetics and BreedingGuangzhou 510000China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding College of AgricultureYangzhou UniversityYangzhou 225009China State Key Laboratory of rice Biology China National Rice Research InstituteHangzhou 311400China Yazhouwan National Laboratory No.8 Huanjin RoadYazhou DistrictSanya CityHainan Province 572024China These authors contributed equally to this article

plants are constantly exposed to microbial pathogens in the *** branch of innate plant immunity is mediated by cell-membrane-localized receptors,but less is known about associations between DNA damage and plant immune ***,we show that rice(Oryza sativa)mesophyll cells are prone to DNA double-stranded breaks(DSBs)in response to ZJ173,a strain of Xanthomonas oryzae ***(Xoo).The DSB signal transducer ataxia telangiectasia mutated(ATM),but not the ATM and rad3-related branch,confers resistance against ***,the MrE11–ATM module phosphorylates suppressor of gamma response 1(SOG1),which activates several phenylpropanoid pathway genes and prompts downstream phytoalexin biosynthesis during Xoo ***,overexpression of the topoisomerase gene TOp6A3 causes a switch from the classic non-homologous end joining(NHEJ)pathway to the alternative NHEJ and homologous recombination pathways atXoo-induced *** enhanced ATM signaling of the alternative NHEJ pathway strengthens the SOG1-regulated phenylpropanoid pathway and thereby boosts Xoo-induced phytoalexin biosynthesis in TOp6A3-OE1 overexpression ***,the MrE11–ATM–SOG1 pathway serves as a prime example of plant–pathogen interactions that occur via host non-specific recogni*** function of TOp6-facilitated ATM signaling in the defense response makes it a promising target for breeding of rice germplasm that exhibits resistance to bacterial blight disease without a growth penalty.

关键词： Oryza sativa Xanthomonas oryzae pv.oryzae DSBs phytoalexins MrE11–ATM–SOG1 TOp6 complex

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Investigation on taste characteristics and sensory perception of soft-boiled chicken during oral processing based on electronic tongue and electronic nose

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Food Science and Human Wellness 2024年第1期13卷 313-326页

作者： Na xu Xianming Zeng peng Wang Xing Chen Xinglian xu Minyi Han College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China National center of Meat quality and Safety Control Nanjing Agricultural UniversityNanjing 210000China State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122China Wens Foodstuff Co. Ltd.Yunfu 527400China

The sensory perception of food is a dynamic process,which is closely related to the release of flavor substances during oral ***’s not only affected by the food material,but also subjected to the individual oral *** explore the oral processing characteristics of soft-boiled chicken,the sensory properties,texture,particle size,viscosity,characteristic values of electronic nose and tongue of different chicken samples were *** correlation analysis showed that the physical characteristics especially the cohesiveness,springiness,resilience of the sample determined oral processing *** addition of chicken skin played a role in lubrication during oral *** particle size of the bolus was heightened at the early stage,and the fluidity was enhanced in the end,which reduced the chewing time to the swallowing point and raised the aromatic compounds signal of electronic *** the effect of chicken skin on chicken thigh with relatively high fat content,was opposite in electronic nose,which had a certain masking effect on the perception of umami and sweet *** conclusion,fat played a critical role in chicken oral processing and chicken thigh had obvious advantages in comprehensive evaluation of soft-boiled chicken,which was more popular among people.

关键词： Oral processing Chicken Electronic tongue Electronic nose

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Construction and characterization of the transformation-competent artificial chromosome (TAC) libraries of Leymus multicaulis

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Science china(Life Sciences) 2008年第7期51卷 604-613页

作者： xu YueYu 1,2,3,ZHOU YuLei 4,5 ,SONG LinLin 6 ,ZHANG Yan 3 &ZHAO MaoLin 1 1 beijing Agro-Biotechnology research center,beijing Academy of agriculture and Forestry Science,beijing 100097,china 2 Department of Chemistry and Chemical Engineering,Hunan Institute of Engineering,Xiangtan 411104,china 3 College of Life Science,Capital Normal university,beijing 100037,china 4 College of Life Science,Zhongkai university of agriculture and Technology,Guangzhou 510225,china 5 College of Grassland Science,Gansu agricultural university,Lanzhou 730070,china 6 Department of Biology,Henan Institute of Science and Technology,Xinxiang 453003,china 1. beijing Agro-Biotechnology research center Beijing Academy of Agriculture and Forestry Science Beijing 100097 China 2. Department of Chemistry and Chemical Engineering Hunan Institute of Engineering Xiangtan 411104 China 3. College of Life Science Capital Normal University Beijing 100037 China 4. College of Life Science Zhongkai University of Agriculture and Technology Guangzhou 510225 China 5. College of Grassland Science Gansu Agricultural University Lanzhou 730070 China 6. Department of Biology Henan Institute of Science and Technology Xinxiang 453003 China

Transformation-competent artificial chromosome system is able to clone and transfer genes efficiently in *** order to clone genes highly tolerant to barley yellow dwarf virus(BYDV),Aphids,drought and salt from Leymus multicaulis,the two TAC genomic libraries I and II were constructed in vector pYLTAC17 and pYLTAC747H/sacB,which contain about 165000 and 236000 recombinant clones *** genome coverage of the two libraries was totally estimated to be about 3―5 haploid genome equivalents,as size selection of genomic DNA fragments was approximately from 9 to 300 *** of the genomic libraries were collected as bulked pools each containing 500 clones or so,stored in twelve 96-deep-well plates and then were gridding in triplicate onto a high-density colony hybridization filter with a 3×3 pattern using a GeneTAC?G3 arraying robot after being transferred manually into three 384-well *** 2501 and 2890 clones of Library in pYLTAC17 and in pYLTAC747H/sacB were stored individually in fourteen 384-well plates and then were automatically gridding in duplicate onto a high-density colony hybridization filter with a 6×6 pattern after a replication of *** positive clones were detected by using the probe glutahione reductase gene of *** libraries constructed here can be used to isolate genomic clones containing target genes,and to carry out genome walking for positional *** the target TAC clones were isolated,they could be immediately transferred into plant genomes with the Agrobacterium system.

关键词： Leymus multicaulis megabase-size DNA transformation-competent artificial chromosome(TAC) genomic library

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Iodine enrichment in the groundwater in South china and its hydrogeochemical control

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Journal of Environmental Sciences 2024年第8期142卷 226-235页

作者： Fengping Zhou Qianting xu Yuyun Chen Weihua Zhang rongliang Qiu Guangdong provincial Key Laboratory of Environmental pollution and remediation Technology Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil RemediationSchool of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China Shenzhen research Institute Sun Yat-sen UniversityShenzhen 518057China Guangdong provincial Key Laboratory of agricultural&rural pollution Abatement and Environmental Safety School of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory for Lingnan Modern agriculture Guangzhou 510642China

In North china,iodine-rich groundwater has been extensively studied,but few in South *** study aimed to investigate the characteristics of iodine-rich groundwater in South china and identify potential contamination *** results revealed that the average concentration of iodine in groundwater was 890μg/L,with a maximumconcentration of 6350μg/L,exceeding the permitted levels recommended by the World Health Organization(5–300μg/L).Notably,the enrichment of iodide occurred in acidic conditions(pH=6.6)and a relatively low Eh environment(Eh=198.4 mV).pearson correlation and cluster analyses suggested that the enrichment of iodide could be attributed to the intensified redox process involving Mn(II),iodine(I_(2)),or iodate(IO_(3)^(−))in the *** strong affinity between Mn(II)and I_(2)/IO_(3)^(−)facilitated their interaction,resulting in the formation and mobilization of I^(−)from the soil to the *** experiments further confirmed that reducing substances(such as sodium sulfides,ascorbic acids,and fulvic acids)in the soil with low dissolved oxygen(DO)levels(r DO content(>3.8 mg/L)promoted the oxidation of I^(−)into I_(2)or IO_(3)^(−),leading to its *** research provides new insights into the characteristics and mechanisms of I^(−)enrichment in groundwater in South china,and emphasizes the significance of the redox reactions involving Mn(II)and I_(2)/IO_(3)^(−),as well as the influence of soil properties in regulating the occurrence and transportation of iodine species within groundwater systems.

关键词： Iodine enrichment Acid environment Groundwater South china Manganese

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