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Adsorption–desorption behavior of atrazine on agricultural soils in China

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Journal of Environmental Sciences 2017年第7期29卷 180-189页

作者： Lin Yue ChengJun Ge Dan Feng Huamei Yu Hui Deng Bomin Fu School of Environment and Plant protection Hainan UniversityHaikou 570228China Key Laboratory of protection and Development Utilization of Tropical crop Germplasm Resources(Hainan University) Ministry of EducationHaikou 570228HainanChina

Adsorption and desorption are important processes that affect atrazine transport,transformation,and bioavailability in *** this study,the adsorption–desorption characteristics of atrazine in three soils（laterite,paddy soil and alluvial soil） were evaluated using the batch equilibrium *** results showed that the kinetics of atrazine in soils was completed in two steps：a＂fast＂ adsorption and a ＂slow＂ adsorption and could be well described by pseudo-second-order *** addition,the adsorption equilibrium isotherms were nonlinear and were well fitted by Freundlich and Langmuir *** was found that the adsorption data on laterite,and paddy soil were better fitted by the Freundlich model;as for alluvial soil,the Langmuir model described it *** maximum atrazine sorption capacities ranked as follows：paddy soil 〉 alluvial soil 〉 *** of thermodynamic calculations indicated that atrazine adsorption on three tested soils was spontaneous and *** desorption data showed that negative hysteresis ***,lower solution pH value was conducive to the adsorption of atrazine in *** atrazine adsorption in these three tested soils was controlled by physical adsorption,including partition and surface *** lower equilibrium concentration,the atrazine adsorption process in soils was dominated by surface adsorption;while with the increase of equilibrium concentration,partition was predominant.

关键词： Atrazine Adsorption Desorption agricultural soils

Mitochondrial cytochrome oxidase 1 reveals genetic diversity of the African Snakehead fish Parachanna obscura,Gunther,1861 from Nigeria’s freshwater environment

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Aquaculture and Fisheries 2023年第1期8卷 59-66页

作者： Friday Elijah Osho Bamidele Oluwarotimi Omitoyin Emmanuel Kolawole Ajani Victor O.Azuh Adedapo Olutola Adediji Department of Aquaculture and Fisheries Management University of IbadanIbadan200284Nigeria Virology and Molecular Diagnostic Unit International Institute of Tropical Agriculture(IITA)Ibadan200001Nigeria Department of crop protection and Environmental Biology University of IbadanIbadan200284Nigeria

The study investigated the genetic variation of Parachanna obscura from five rivers(Anambra,Ibbi,Imo,Katsina-Ala and Ogun)in Nigeria using the mitochondrial cytochrome oxidase 1 *** was extracted from 19,22,16,18 and 21 fin clips per river population,respectively and subjected to polymerase chain reaction.A total of 96 sequences,each with 671 bp were obtained with 38(5.6%)polymorphic,27(3.8%)parsimoniously informative and 659(98.2%)conserved *** nucleotide composition was C=28.07%,T=29.43%,A=22.18%,G=20.32%.A total of 40 haplotypes with 38 unique sequences as well as 24 substitutions with 22 transversions and two transitions were *** diversity among populations ranged from 0.00184 to 0.00888 representing Ibbi and Imo,respectively while haplotype diversity ranged from 0.77056 to 0.95000 also,from Ibbi and Imo,*** of molecular variance showed that the intra-population variation accounted for 50.05%.Topology from phylogenetic analyses revealed that *** from Imo River was distinctly different from the rest.

关键词： Nucleotide composition Haplotype diversity Molecular variance Phylogenetic analysis Topology

Double enzyme mimetic activities of multifunctional ag nanoparticle-decorated Co_(3)V_(2)O_(8)hollow hexagonal prismatic pencils for application in colorimetric sensors and disinfection

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Nano Materials Science 2024年第2期6卷 244-255页

作者： Ying Gao Peng Ju Yu Zhang Yuxin Zhang Xiaofan Zhai Jizhou Duan Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao266071PR China Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao266061PR China University of Chinese Academy of Sciences Beijing100049PR China Open Studio for Marine Corrosion and protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266071PR China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071PR China College of Materials Science and Engineering Chongqing UniversityChongqing400044China

Since the catalytic activity of most nanozymes is still far lower than the corresponding natural enzymes,there is urgent need to discover novel highly efficient enzyme-like *** this work,Co_(3)V_(2)O_(8)with hollow hexagonal prismatic pencil structures were prepared as novel artificial enzyme *** were then decorated by photo-depositing ag nanoparticles(ag NPs)on the surface to further improve its catalytic *** ag NPs decorated Co_(3)V_(2)O_(8)(ACVPs)showed both excellent oxidase-and peroxidase-like catalytic *** can oxidize the colorless 3,3’,5,5’-tetramethylbenzidine rapidly to induce a blue *** enhanced enzyme mimetic activities can be attributed to the surface plasma resonance(SPR)effect of ag NPs as well as the synergistic catalytic effect between ag NPs and Co_(3)V_(2)O_(8),accelerating electron transfer and promoting the catalytic *** were applied in constructing a colorimetric sensor,validating the occurrence of the Fenton reaction,and disinfection,presenting favorable catalytic *** enzyme-like catalytic mechanism was studied,indicating the chief role of⋅O_(2)-radicals in the catalytic *** work not only discovers a novel functional material with double enzyme mimetic activity but also provides a new insight into exploiting artificial enzyme mimics with highly efficient catalytic ability.

关键词： Co_(3)V_(2)O_(8) ag NPs Enzyme mimetic Colorimetric sensor Disinfection

Characterization of carotenoid biosynthetic pathway genes in the pea aphid(Acyrthosiphon pisum)revealed by heterologous complementation and RNA interference assays

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Insect Science 2022年第3期29卷 645-656页

作者： Bi-Yue Ding Xiu-Cheng Xie Feng Shang Guy Smagghe Jin-Zhi Niu Jin-Jun Wang Key Laboratory of Entomology and Pest Control Engineering College of Plant ProtectionSouthwest UniversityChongqingChina International Joint Laboratory of China-Belgium on Sustainable crop Pest ControlAcademy of Agricultural SciencesSouthwest UniversityChongqingChina Department of Plants and crops Faculty of Bioscience EngineeringGhent UniversityGhentBelgium

Carotenoids are involved in many essential physiological functions and are produced from geranylgeranyl pyrophosphate through synthase,desaturase,and cyclase *** the pea aphid(Acyrthosiphon pisum),the duplication of carotenoid biosynthetic genes,including carotenoid synthases/cyclases(ApCscA-C)and desaturases(ApCdeA-D),through horizontal gene transfer from fungi has been detected,and ApCdeB has known dehydrogenation ***,whether other genes contribute to aphid carotenoid biosynthesis,and its specific regulatory pathway,remains *** the current study,functional analyses of seven genes were performed using heterologous complementation and RNA interference *** bifunctional enzymes ApCscA-C were responsible for the synthase of phytoene,and ApCscC may also have a cyclase ***,ApCdeC,and ApCdeD had diverse dehydrogenation *** catalyzed the enzymatic conversion of phytoene to neurosporene(three-step product),ApCdeC catalyzed the enzymatic conversion of phytoene to ζ-carotene(two-step product),and ApCdeD catalyzed the enzymatic conversion of phytoene to lycopene(four-step product).Silencing of ApCscs reduced the expression levels of ApCdes,and silencing these carotenoid biosynthetic genes reduced the α-,β-,and γ-carotene levels,as well as the total carotenoid *** results suggest that these genes were activated and led to carotenoid biosynthesis in the pea aphid.

关键词： carotenoid biosynthesis heterologous complementary pea aphid RNA interference

A necessary considering factor for breeding:growth-defense tradeoff in plants

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Stress Biology 2023年第1期3卷 84-94页

作者： Hong Zhang Yuanming Liu Xiangyu Zhang Wanquan Ji Zhensheng Kang State Key Laboratory of crop Stress Biology for Arid Areas College of AgronomyNorthwest A&F UniversityYanglingShaanxi 712100People’s Republic of China State Key Laboratory of crop Stress Biology for Arid Areas College of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi 712100People’s Republic of China

crop diseases cause enormous yield losses and threaten global food *** of resistant cultivars can effectively control the disease and to minimize crop ***,high level of genetic immunity to disease was often accompanied by an undesired reduction in crop growth and ***,literatures have been rapidly emerged in understanding the mechanism of disease resistance and development genes in crop *** determine how and why the costs and the likely benefit of resistance genes caused in crop varieties,we re-summarized the present knowledge about the crosstalk between plant development and disease resistance caused by those genes that function as plasma membrane residents,MAPK cassette,nuclear envelope(NE)channels components and pleiotropic *** the growth-defense tradeoffs on the basis of current advances,finally,we try to understand and suggest that a reasonable balancing strategies based on the interplay between immunity with growth should be considered to enhance immunity capacity without yield penalty in future crop breeding.

关键词： crops Growth-defense Reasonable cell death Yield penalty

Discovery of a widespread presence bunyavirus that may have symbiont-like relationships with different species of aphids

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Insect Science 2022年第4期29卷 1120-1134页

作者： Xin An Wei Zhang Chao Ye Guy Smagghe Jin-Jun Wang Jinzhi Niu Key Laboratory of Entomology and Pest Control Engineering College of Plant ProtectionSouthwest UniversityChongqingChina International Joint Laboratory of China–Belgium on Sustainable crop Pest Control Academy of Agricultural SciencesSouthwest UniversityChongqingChina Department of Plants and crops Faculty of Bioscience EngineeringGhent UniversityGhentBelgium

Aphids are important agricultural pests,vectors of many plant viruses and have sophisticated relationships with symbiotic *** asymptomatic RNA viruses have been reported in aphids due to the application of RNA-seq,but aphid-virus interactions remain *** is the most abundant RNA virus order,which can infect mammals,arthropods,and ***,many bunyaviruses have specific hosts,such as ***,we discovered 18 viruses from 10 aphid species by ***,a widespread presence bunyavirus,Aphid bunyavirus 1(ABV-1),was determined to have a wide host range,infecting and replicating in all 10 tested aphid ***-1 may be transmitted horizontally during feeding on plant leaves and vertically through *** a comparison of the physiological parameters of ABV-1high and ABV-1low strains of pea aphid,higher ABV-1 titers reduced the total nymphal duration and induced the ***,viral titer significantly affected the lipid and protein contents in pea *** summary,we proposed that ABV-1 may have stable symbiont-like relationships with aphids,and these observations may provide a new direction for studying bunyaviruses in aphids and establishing a model for virus-aphid interactions.

关键词： insec-specific virus pea aphid Phasmaviridae RNA virus RNAi

Pijx confers broad-spectrum seedling and panicle blast resistance by promoting the degradation of ATP β subunit and OsRbohC-mediated ROS burst in rice

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Molecular Plant 2023年第11期16卷 1832-1846页

作者： Ning Xiao Yunyu Wu Xiaoxiang Zhang Zeyun Hao Zichun Chen Zefeng Yang Yue Cai Ruyi Wang Ling Yu Zhiping Wang Yue Lu Wei Shi Cunhong Pan Yuhong Li Changhai Zhou Jianju Liu Niansheng Huang Guangqing Liu Hongjuan Ji Shuhao Zhu Shuai Fang Yuese Ning Aihong Li Institute of agricultural Sciences for Lixiahe Region in Jiangsu Yangzhou Rice Experiment Station of the China Agricultural Research SystemJiangsu Key Laboratory of Crop Genomics and Molecular BreedingYangzhou 225009China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Key Laboratory of Plant Functional Genomics Ministry of EducationJiangsu Key Laboratory of Crop Genomics and Molecular BreedingAgricultural College of Yangzhou UniversityYangzhou 225009China

Rice blast,caused by the fungal pathogen Magnaporthe oryzae,is one of the most important diseases of *** of blast-resistance genes is the most economical,effective,and environmentally friendly way to control the ***,genetic resources with broad-spectrum resistance(BSR)that is effective throughout the rice growth period are *** this work,using a genome-wide association study,we identify a new blast-resistance gene,Pijx,which encodes a typical CC-NBS-LRR *** is derived from a wild rice species and confers BSR to *** at both the seedling and panicle *** functions of the resistant haplotypes of Pijx are confirmed by gene knockout and overexpression ***,the LRR domain in Pijx interacts with and promotes the degradation of the ATP synthase β subunit(ATPb)via the 26S proteasome *** acts as a negative regulator of Pijx-mediated panicle blast resistance,and interacts with OsRbohC to promote its ***,loss of ATPb function causes an increase in NAPDH content and ROS ***,when Pijx is introgressed into two japonica rice varieties,the introgression lines show BSR and increased yields that are approximately 51.59%and 79.31%higher compared with those of their parents in a natural blast disease *** addition,we generate PPL^(Pijx Pigm) and PPL^(Pijx Piz-t) pyramided lines and these lines also have higher BSR to panicle blast compared with Pigm-or Piz-t-containing rice ***,this study demonstrates that Pijx not only confers BSR to *** but also maintains high and stable rice yield,providing new genetic resources and molecular targets for breeding rice varieties with broad-spectrum blast resistance.

关键词： panicle blast broad-spectrum resistance Pijx ATPb ROS burst

Global sensitivity analysis for choosing the main soil parameters of a crop model to be determined

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agricultural Sciences 2012年第7期3卷 949-961页

作者： Hubert Varella Samuel Buis Marie Launay Martine Guérif INRA UMR 1114 INRA-UAPV EMMAH Avignon France INRA Unite Agroclim Avignon France syngenta crop protection Münchwilen ag Stein/AG Switzerland

The use of a crop model like STICS for appropriate management decision support requires a good knowledge of all the parameters of the model. Among them, the soil parameters are difficult to know at each point of interest and costly techniques may be used to measure them. It is therefore important to know which soil parameters need to be determined. It can be stated that those which affect significantly the output variable deserve an accurate determination while those which slightly affect the model output variable do not. This paper demonstrates how a global sensitivity analysis method based on variance decomposition can be applied on soil parameters in order to divide them in the two categories. The Extended FAST method applied to the crop model STICS and a set of 13 soil parameters first allows to calculate the part of variance explained by each soil parameter (giving global sensitivity indices of the soil parameters) and the coefficient of variation of the output variables (measuring the effect of the parameter uncertainty on each variable). These metrics are therefore used for deciding on the importance of the parameter value measurement. Different output variables (Leaf Area Index and chlorophyll content) are evaluated at different stages of interest while others (crop yield, grain protein content, soil mineral nitrogen) are evaluated at harvest. The analysis is applied on two different annual crops (wheat and sugar beet), two contrasted weather and two types of soil depth. When the uncertainty of the output generated by the soil parameters is large (coefficient of variation > 1/3), only the parameters having a significant global sensitivity indices (higher than 10%) are retained. The results show that the number of soil parameters which deserve an accurate determination can be significantly reduced by the use of this relevant method for appropriate management decision support.

关键词： Global Sensitivity Analysis Uncertainty Analysis Soil Parameters crop Model STICS Management Decision Support agro-Environmental Variables

Understanding the lifestyles and pathogenicity mechanisms of obligate biotrophic fungi in wheat:The emerging genomics era

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The crop Journal 2018年第1期6卷 60-67页

作者： Chunlei Tang Qiang Xu Mengxin Zhao Xiaojie Wang Zhensheng Kang State Key Laboratory of crop Stress Biology for Arid Areas College of Plant Protection Northwest A&F University

Obligate biotrophic fungi cause serious and widespread diseases of crop plants, but are challenging to investigate because they cannot be cultured in vitro. The two economically important groups of biotrophic fungi parasitizing wheat are the rust and powdery mildew pathogens, but their obligate biotrophic lifestyles and pathogenicity mechanisms are not well understood at the molecular level. With the advent of next generation sequencing technology, increasing numbers of pathogen genomes are becoming available. Research in plant pathology has entered a new genomics era. This review summarizes recent progress in understanding the biology and pathogenesis of biotrophic fungal pathogens attacking wheat based on pathogen genomics. We particularly focus on the three wheat rust and the powdery mildew fungi in regard to genome sequencing, avirulence gene cloning, effector discovery, and pathogenomics. We predict that coordinated study of both wheat and its pathogens should reveal new insights in biotrophic adaptation, pathogenicity mechanisms,and population dynamics of these fungi that will assist in development of new strategies for breeding wheat varieties with durable resistance.

关键词： Common wheat Biotrophic fungus Pathogenicity Pathogenomics Powdery mildew Rust