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Journal of Environmental Sciences 2022年第6期34卷 90-102页

作者： Feng Zhang Di Peng Lu Liu Huidan Jiang lianyang bai Longping Branch Graduate School of Hunan UniversityChangsha 410125China Biotechnology Research Institute Hunan Academy of Agricultural SciencesChangsha 410125China

The association between the rhizospheric microbial community and Cd accumulation in rice is poorly understood.A field trial was conducted to investigate the different rhizobacterial communities of two rice cultivars with high Cd accumulation(HA)and low Cd accumulation(LA)at four growth *** showed that the Cd content in the roots of the HA cultivar was 1.23-27.53 higher than that of the LA cultivar(0.08-10.5μg/plant)at four *** LA cultivar had a significantly lower Cd availability in rhizosphere and a higher quantity of iron plaque(IP)on the root surface than the HA cultivar at four *** resulted in the reduction of Cd concentration in IPs and Cd translocation from *** analysis indicated that the LA cultivar formed a distinct rhizobacterial community from the HA cultivar and had lessα-*** rhizosphere of the LA cultivar was enriched in specific bacterial taxa(e.g.,Massilia and Bacillus)involved in Cd immobilization by phosphate precipitation and IP formation by iron ***,the rhizosphere in the HA cultivar assembled abundant sulfur-oxidizing bacteria(e.g.,Sulfuricurvum)and iron reduction bacteria(Geobacter).They promoted Cd mobilization and reduced IP formation via the metal redox *** study reveals a potential approach in which specific rhizobacteria decrease or increase Cd accumulation in rice on contaminated soil and provides a new perspective for secure rice production.

关键词： Rice cultivar Cd accumulation Rhizosphere Bacterial community Iron plaque Cd availability

Quinclorac Resistance in Echinochloa crus-galli from China

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Rice science 2019年第5期26卷 300-308页

作者： PENG Qiong HAN Heping YANG Xia bai lianyang YU Qin Stephen BPOWLES Hunan Agricultural Biotechnology Research Institute Hunan Academy of Agricultural SciencesChangsha 410125China Collaborative Innovation Center for Field Weeds Control Hunan University of HumanitiesScience and TechnologyLoudi 417000China Australian Herbicide Resistance Initiative School of Agriculture and EnvironmentUniversity of Western AustraliaWA 6009Australia Jiangsu Academy of Agricultural Sciences Nanjing 210014China

Echinochloa crus-galli is a major weed in rice fields in China,and quinclorac has been long used for its ***-reliance of quinclorac has resulted in quinclorac resistance in *** resistant(R)***-galli populations from Hunan,China were confirmed to be at least 78-fold more resistant to quinclorac than the susceptible(S)*** difference in foliar uptake of 14C-labelled quinclorac was detected between the R and S ***,a higher level of 14C translocation and a lower level of quinclorac metabolism were found in the R *** and induced expression levels ofβ-cyanoalanine synthase(β-CAS)gene andβ-CAS activity were not significantly different between the R and S ***,the induction expression of 1-aminocyclopropane-1-carboxylic acid oxidase(ACO1)gene by quinclorac treatment was evident in the S plants but not in the R *** resistance in the two resistant ***-galli populations was not likely to be related to foliar uptake,translocation or metabolism of quinclorac,nor to cyanide detoxification viaβ-***,target-site based quinclorac signal reception and transduction and regulation of the ethylene synthesis pathway should be the focus for further research.

关键词： Echinochloa crus-galli quinclorac resistance quinclorac metabolism β-cyanoalanine synthase 1-aminocyclopropane-1-carboxylic acid synthase 1-aminocyclopropane-1-carboxylic acid oxidase rice

Co-planted barnyardgrass reduces rice yield by inhibiting plant above-and belowground-growth during post-heading stages

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The Crop Journal 2021年第5期9卷 1198-1207页

作者： Zichang Zhang Jingjing Cao Tao Gu Xia Yang Qiong Peng lianyang bai Yongfeng Li Institute of Plant Protection Jiangsu Academy of Agricultural SciencesKey Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding BaseNanjing 210014JiangsuChina Biotechnology Research Center Hunan Academy of Agricultural SciencesChangsha 410125HunanChina

Barnyardgrass (Echinochloa spp.) is the most common noxious weed in rice paddies as it inhibits rice growth and reduces grain *** date,little information is available on above-and belowgroundgrowth changes in rice due to neighboring *** study aimed to investigate the changes in root traits and shoot growth of rice when it is grown with different kinds of *** rice plants (*** 9108) were co-cultured with two varieties of Echinochloa crusgalli (L.) Beauv.(EP,*** (pursh) Petern;EH,*** (H.B.K.) Hitchc),and *** (L.) Link (EL) in the field in 2017 and *** treatments included control (i.e.,weed free rice plants) and co-cultures with each of three barnyardgrasses (EP,EH,and EL).The results revealed that EP,EH,and EL treatments significantly reduced rice grain yields by 30.6%–36.2%,42.5%–46.5%,and 10.6%–14.3%,*** growth including shoot dry weight,leaf photosynthetic rate,zeatin (Z) and zeatin riboside (ZR) in grains,and activities of key enzymes involved in sucrose-to-starch conversion in grains and root traits,such as length density,root dry weight,total absorbing surface area,active absorption surface area,oxidation activity,and Z+ZR contents in roots were dramatically reduced during post-heading stages of rice when grown with the three kinds of ***,above-mentioned rice shoot growth indices were strongly and positively correlated with root *** results suggested the decrease in rice shoot growth and root traits during post-heading stages contributes to the reduction in the rice yield when it grows with barnyardgrass neighbors.

关键词： Rice Barnyardgrass Grain yield Root traits Shoot traits

Weed genomics:yielding insights into the genetics of weedy traits for crop improvement

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aBIOTECH 2023年第1期4卷 20-30页

作者： Yujie Huang Dongya Wu Zhaofeng Huang Xiangyu Li Aldo Merotto Jr lianyang bai Longjiang Fan Institute of Crop Science and Institute of Bioinformatics Zhejiang UniversityHangzhou 310058China Institute of Plant Protection Chinese Academy of Agricultural SciencesBeijing 100193China Department of Crop Sciences Agricultural School Federal University of Rio Grande do SulPorto Alegre 91540-000Brazil Hunan Weed Science Key Laboratory Hunan Academy of Agriculture SciencesChangshang 410125China

Weeds cause tremendous economic and ecological damage *** number of genomes established for weed species has sharply increased during the recent decade,with some 26 weed species having been sequenced and de novo genomes *** genomes range from 270 Mb(Barbarea vulgaris)to almost 4.4 Gb(Aegilops tauschii).Importantly,chromosome-level assemblies are now available for 17 of these 26 species,and genomic investigations on weed populations have been conducted in at least 12 *** resulting genomic data have greatly facilitated studies of weed management and biology,especially origin and *** weed genomes have indeed revealed valuable weed-derived genetic materials for crop *** this review,we summarize the recent progress made in weed genomics and provide a perspective for further exploitation in this emerging field.

关键词： Weeds Genome sequencing Population genomics Adaptive traits Evolution

Weed biology andmanagement in the multi-omics era:Progress and perspectives

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Plant Communications 2024年第4期5卷 16-35页

作者： Ke Chen Haona Yang Di Wu Yajun Peng Lei Lian lianyang bai Lifeng Wang Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley Ministry of Agriculture and Rural AffairsHunan Rice Research InstituteHunan Academy of Agricultural SciencesChangsha 410125China State Key Laboratory of Hybrid Rice Hunan Academy of Agricultural SciencesChangsha 410125China Longping Branch College of BiologyHunan UniversityChangsha 410125China Huangpu Research Institute of Longping Agricultural Science and Technology Guangzhou 510715China Hunan Weed Science Key Laboratory Hunan Agricultural Biotechnology Research InstituteHunan Academy of Agricultural SciencesChangsha 410125China Qingdao Kingagroot Compounds Co.Ltd Qingdao 266000China

Weeds pose a significant threat to crop production,resulting in substantial yield *** addition,they possess robust weedy traits that enable them to survive in extreme environments and evade human *** recent years,the application of multi-omics biotechnologies has helped to reveal the molecular mechanisms underlying these weedy *** this review,we systematically describe diverse applications of multi-omics platforms for characterizing key aspects of weed biology,including the origins of weed spe-cies,weed classification,and the underlying genetic and molecular bases of important weedy traits such as crop–weed interactions,adaptability to different environments,photoperiodicflowering responses,and herbicide *** addition,we discuss limitations to the application of multi-omics techniques in weed science,particularly compared with their extensive use in model plants and *** this regard,we provide a forward-looking perspective on the future application of multi-omics technologies to weed science *** powerful tools hold great promise for comprehensively and efficiently unraveling the intricate molecular genetic mechanisms that underlie weedy *** resulting advances will facilitate the development of sustainable and highly effective weed management strategies,promoting greener practices in agriculture.

关键词： weeds multi-omics weed management genomics RNA-seq

Direct Optical Resolution of Chiral Pesticides by High Performance Liquid Chromatography

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Chinese Journal of Chemical Engineering 2011年第4期19卷 603-609页

作者： LI Xiaogang LIU Yiping HU Changdi bai lianyang GAO Bida HUANG Kelong College of Bio-safety Science & Technology Hunan Agricultural University Changsha 410128 China Hunan Institute for the Control ofAgrochemicals Changsha 410005 China Hunan Institute of Humanities Science and Technology Loudi 417000 China Institute of Functionalized Materials & Chemistry Central South University Changsha 410083 China

Enantiomer separation is one of the most important prerequisites for the investigation of environmental enantioselective behavior for chiral *** enantiomeric separation of three chiral pesticides,indoxacarb,lambda-cyhalothrin,and simeconazole,were studied on cellulose tris-(3,5-dimethylphenyl-carbamate)-coated chiral stationary phase(CDMPC-CSP) using high-performance liquid chromatography under normal phase *** effects of chromatographic conditions,such as the mobile phase composition including the concentration and type of alcohol modifiers in hexane,flow rate and column temperature,on enantiomer separation were *** thermodynamical mechanism of enantioseparation and chiral recognition mechanism were *** separation were achieved using 20% n-propanol for indoxacarb,2% iso-butanol for lambda-cyhalothrin,and 20% iso-propanol for simeconazole as modifiers in hexane at 25℃ with the selectivity factor(a) of 1.69,1.82 and 1.70,*** resolution factor(Rs) decreased as the flow rate increased from 0.4 to 1.1 ml·*** retention factor(k') and selectivity factor for the enantiomers of analytes decreased as temperature *** lna-1/T plots for racemic chiral pesticides were linear in the range of 15-35℃ in hexane/iso-propanol and the chiral separation was controlled by *** bonding,π-π and dipole-dipole interactions between enantiomers and CDMPC-CSP play an important role in chiral identification,and the fitting of the asymmetric portion of solutes in a chiral cavity or channel of the CSP is also important.

关键词： chiral resolution high-performance liquid chromatography indoxacarb lambda-cyhalothrin simeconazole thermodynamical mechanism

Genomic insights into the origin, adaptive evolution, and herbicide resistance of Leptochloa chinensis, a devastating tetraploid weedy grass in rice fields

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Molecular Plant 2022年第6期15卷 1045-1058页

作者： Lifeng Wang Xuepeng Sun Yajun Peng Ke Chen Shan Wu Yanan Guo Jingyuan Zhang Haona Yang Tao Jin Lamei Wu Xiaomao Zhou Bin Liang Zhenghong Zhao Ducai Liu Zhangjun Fei lianyang bai State Key Laboratory of Hybrid Rice Hunan Academy of Agricultural SciencesChangsha 410125China Hunan Weed Science Key Laboratory Hunan Academy of Agricultural SciencesChangsha 410125China Boyce Thompson Institute Cornell UniversityIthacaNY 14853USA College of Horticulture Science Zhejiang A&F UniversityHangzhou 311300China Qingdao Kingagroot Compounds Co.Ltd Qingdao 266000China USDA-ARS Robert W.Holley Center for Agriculture and HealthIthacaNY 14853USA

Chinese sprangletop (Leptochloa chinensis), belonging to the grass subfamily Chloridoideae, is one of the most notorious weeds in rice ecosystems. Here, we report a chromosome-scale reference genome assembly and a genomic variation map of the tetraploid L. chinensis. The L. chinensis genome is derived from two diploid progenitors that diverged ∼10.9 million years ago, and its two subgenomes display neither fractionation bias nor overall gene expression dominance. Comparative genomic analyses reveal substantial genome rearrangements in L. chinensis after its divergence from the common ancestor of Chloridoideae and, together with transcriptome profiling, demonstrate the important contribution of tetraploidization to the gene sources for the herbicide resistance of L. chinensis. Population genomic analyses of 89 accessions from China reveal that L. chinensis accessions collected from southern/southwestern provinces have substantially higher nucleotide diversity than those from the middle and lower reaches of the Yangtze River, suggesting that L. chinensis spread in China from the southern/southwestern provinces to the middle and lower reaches of the Yangtze River. During this spread, L. chinensis developed significantly increased herbicide resistance, accompanied by the selection of numerous genes involved in herbicide resistance. Taken together, our study generated valuable genomic resources for future fundamental research and agricultural management of L. chinensis, and provides significant new insights into the herbicide resistance as well as the origin and adaptive evolution of L. chinensis.

关键词： Leptochloa weed sgenome polyploidization genome evolution genetic diversity adaptive selection herbicide resistance

The Genomes of the Allohexaploid Echinochloa crus-galli and Its Progenitors Provide Insights into Polyploidization-Driven Adaptation

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Molecular Plant 2020年第9期13卷 1298-1310页

作者： Chu-Yu Ye Dongya Wu Lingfeng Mao Lei Jia Jie Qiu Sangting Lao Meihong Chen Bowen Jiang Wei Tang Qiong Peng Lang Pan Lifeng Wang Xiaoxiao Feng Longbiao Guo Chulong Zhang Elizabeth A.Kellogg Kenneth M.Olsen lianyang bai Longjiang Fan Institute of Crop Sciences&Institute of Bioinformatics Zhejiang UniversityHangzhou 310058China Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200235China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China Hunan Weed Science Key Laboratory Hunan Academy of Agriculture ScienceChangsha 410125China Agricultural Experiment Station Zhejiang UniversityHangzhou 310058China lnstitute of Biotechnology Zhejiang UniversityHangzhou 310058China Donald Danforth Plant Science Center St.LouisMO 63132USA Department of Biology Washington University in St.LouisSt.LouisMO 63130USA

The hexaploid species Echinochloa crus-galli is one of the most detrimental weeds in crop fields,especially in rice *** evolutionary history is similar to that of bread wheat,arising through polyploidization after hybridization between a tetraploid and a diploid *** this study,we generated and analyzed high-quality genome sequences of diploid(***),tetraploid(***),and hexaploid(***-galli)Echinochloa *** family analysis showed a significant loss of disease-resistance genes such as those encoding NB-ARC domain-containing proteins during Echinochloa polyploidization,contrary to their significant expansionduring wheat polyploidization,suggesting that natural selection might favor reduced investment in resistance in this weed to maximize its growth and *** contrast to the asymmetric patterns of genome evolution observed in wheat and other crops,no significant differences in selection pressure were detected between the subgenomes in *** and *** addition,distinctive differences in subgenome transcriptome dynamics during hexaploidization were observed between ***-galli and bread ***,our study documents genomic mechanisms underlying the adaptation of a major agricultural weed during *** genomic and transcriptomic resources of three Echinochloa species and new insights into the polyploidization-driven adaptive evolution would be useful for future breeding cereal crops.

关键词： breeding crops ation

Influence of Environmental Factors on Seed Germination and Emergence of Asia minor bluegrass(Polypogon fugax)

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Influence of Environmental Factors on Seed Germination and E...

第十二届全国杂草科学大会

作者： Lifeng Wang Lamei Wu Xiaomao Zhou Xiangying Liu lianyang bai Hunan Academy of Agricultural Sciences

Polypogon fugax is a malignant weed that has caused great damage to rape(Brassica napus)fields in Dongting Lake District,*** chamber experiments were conducted to determine the influence of environmental factors on seed germination and the emergence of Polypogon *** optimum temperature for seed germination was a constant temperature of 20 C or an alternating temperature of 22/15 *** could germinate in the dark,but light exposure significantly enhanced the germination *** than 50%of seeds germinated over a pH range between 4 and *** was highly sensitive to osmotic stress and germination was completely inhibited at an osmotic potential of-0.4 MPa,indicating that it was favored by a moist *** salinity reduced the germination of Polypogon fugax seeds from 58%(0 MPa)to 13%(80 mM).The highest seedling emergence(62%)was observed when seeds were placed on the soil surface,and no seedlings emerged from seeds placed at a depth of 5 *** work shows that the climate and soil conditions in Dongting Lake District are suitable for the seed germination of Polypogon fugax,and that the no-till fields allowing seeds remained on the surface have promoted the spread of this ***:Asia minor bluegrass;Polypogon fugax Nees ex Steud.;Rape,Brassica napus L.

关键词： Temperature light pH osmotic and salt stress burial depth

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棉田反枝苋和马齿苋对草甘膦的抗药性

棉花学报 2014年第6期26卷 492-498页

作者：杨浩娜柏连阳湖南农业大学农药研究所长沙410128 湖南省农业科学院长沙410125

为明确棉田反枝苋和马齿苋对草甘膦的抗性水平,采用培养皿种子法和整株检测法分别测定了7个省18个采样点反枝苋、马齿苋的抗性水平,并采用紫外分光光度计测定采样点反枝苋、马齿苋体内莽草酸含量变化的差异。结果表明:采样点地区的反枝... 详细信息

为明确棉田反枝苋和马齿苋对草甘膦的抗性水平,采用培养皿种子法和整株检测法分别测定了7个省18个采样点反枝苋、马齿苋的抗性水平,并采用紫外分光光度计测定采样点反枝苋、马齿苋体内莽草酸含量变化的差异。结果表明:采样点地区的反枝苋和马齿苋对草甘膦存在不同程度的抗药性,2种监测法的抗性趋势基本一致,其中陕西西安采样点的反枝苋和新疆疏勒采样点的马齿苋处于敏感水平,河北曲周采样点的反枝苋抗性倍数最高。植物体内莽草酸积累变化与植物抗性水平相关,抗性较低的植物体内莽草酸积累量普遍高于抗性较高的植物。

关键词：反枝苋马齿苋草甘膦抗药性棉田