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Selenium-oxidizing Agrobacterium sp.T3F4 decreases arsenic uptake by Brassica rapa *** a native polluted soil

Journal of Environmental Sciences 2024年第4期138卷 506-515页

作者： Lijin An Chunzhi Zhou Lipeng Zhao Ao Wei Yiting Wang Huimin Cui Shixue Zheng State Key laboratory of Agricultural microbiology College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China

Toxic arsenic(As)and trace element selenium(Se)are transformed by microorganisms but their complex interactions in soil-plant systems have not been fully *** Asand Se-oxidizing bacterium,Agrobacterium sp.T3F4,was applied to a native seleniferous As-polluted soil to investigate As/Se uptake by the vegetable Brassica rapa *** As-Se interaction as mediated by strain *** Se content in the aboveground plants was significantly enhanced by 34.1%,but the As content was significantly decreased by 20.5% in the T3F4-inoculated pot culture compared to the control(P<0.05).Similar result was shown in treatment with additional 5 mg/kg of Se(IV)in *** addition,the As contents in roots were significantly decreased by more than 35% under T3F4 or Se(IV)treatments(P<0.05).Analysis of As-Se-bacterium interaction in a soil simulation experiment showed that the bioavailability of Se significantly increased and As was immobilized with the addition of the T3F4strain(P<0.05).Furthermore,an As/Se co-exposure hydroponic experiment demonstrated that As uptake and accumulation in plants was reduced by increasing Se(IV)*** 50% growth inhibition concentration(IC50)values for As in plants were increased about one-fold and two-fold under co-exposure with 5 and 10μmol/L Se(IV),*** conclusion,strain T3F4 improves Se uptake but decreases As uptake by plants via oxidation of As and Se,resulting in decrease of soil As bioavailability and As/Se competitive absorption by *** provides a potential bioremediation strategy for Se biofortification and As immobilization in As-polluted soil.

关键词： Selenium oxidation Selenium biofortification Arsenite-oxidizing bacteria Arsenic immobilization Brassica rapa L

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Synthesis of betanin by expression of the core betalain biosynthetic pathway in carrot

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Horticultural Plant Journal 2024年第3期10卷 732-742页

作者： Bo Wang Yahui Wang Yuanjie Deng Quanhong Yao Aisheng Xiong State Key laboratory of Crop genetics and Germplasm Enhancement College of HorticultureNanjing Agricultural UniversityNanjingJiangsu 210095China Shanghai Key laboratory of Agricultural genetics and Breeding Biotechnology Research Institute of Shanghai Academy of Agricultural ScienceShanghai 201106China

Betalain has received increased attention because of its high nutritional value and crucial physiological *** on the elucidation of its core biosynthetic pathway,betalain can be produced in additional plants by metabolic *** of betalain in carrot(Daucus carota L.)can improve its nutritional quality and economic value by extracting betalain from the fleshy root,non-edible part,and processing residue of *** this study,two different constructs,namely,pYB:mCD(AomelOS,BvCYP76AD1S,and BvDODA1S)and p YB:CDD(BvCYP76AD1S,BvDODA1S,and MjcDOPA5GTS),were introduced into carrot for betanin synthesis by Agrobacterium-mediated *** can be synthetized in both transgenic calli,and p YB:m CD-transgenic callus can be used to produce betacyanin by suspension ***,pYB:mCD-transgenic seedlings can synthetize betanin only by tyrosine *** p YB:CDD-transgenic lines can synthetize betanin in whole *** betanin content in fleshy root of pYB:CDD-transgenic carrot was(63.4±9)μg·g^(-1)fresh weight according to quantitative *** betanin-producing carrot plant materials can be used to synthesize betanin for industrial application or consumption as dietary sources.

关键词： Daucus carota L. Betanin Biosynthesis Metabolic engineering Biofortification

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The MYB transcription factor OsMYBxoc1 regulates resistance to Xoc by directly repressing transcription of the iron transport gene OsNRAMP5 in rice

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Plant Communications 2024年第6期5卷 230-245页

作者： Haimiao Zhang Baolong Sun Wei Wu Yang Li Ziyi Yin Chongchong Lu Haipeng Zhao Lingguang Kong Xinhua Ding State Key laboratory of Crop Biology Shandong Provincial Key Laboratory of Agricultural MicrobiologyCollege of Plant ProtectionShandong Agricultural UniversityTai’an 271018China

Bacterial leaf streak caused by Xanthomonas oryzae ***(Xoc)is a continuous threat to rice cultivation,leading to substantial yield losses with socioeconomic *** ions are essential mineral nutrients for plant growth,but little information is available on how they influence mechanisms of rice immunity against ***,we investigated the role of the myeloblastosis-related(MYB)transcriptional repressor OsMYBxoc1 in modulation of rice resistance through control of iron ion *** of OsMYBxoc1 significantly increased rice resistance,whereas OsMYBxoc1 RNA-interference lines and knockout mutants showed the opposite *** of OsMYBxoc1 expression dampened the immune response induced by pathogen-associated molecular *** demonstrated that OsMYBxoc1 binds specifically to the OsNRAMP5 promoter and represses transcription of ***5,a negative regulator of rice resistance to bacterial leaf streak,possesses metal ion transport activity,and inhibition of OsMYBxoc1 expression increased the iron ion content in *** of the iondependent H2O2 scavenging enzyme catalase was increased in plants with suppressed expression of OsMYBxoc1 or overexpression of *** found that iron ions promoted Xoc infection and interfered with the production of reactive oxygen species induced by *** type Ⅲ effector XopAK directly inhibited OsMYBxoc1 transcription,indicating that the pathogen may promote its own proliferation by relieving restriction of iron ion transport in *** addition,iron complemented the pathogenicity defects of the RS105_DXopAK mutant strain,further confirming that iron utilization by Xoc may be dependent upon *** conclusion,our study reveals a novel mechanism by which OsMYBxoc1 modulates rice resistance by regulating iron accumulation and demonstrates that Xoc can accumulate iron ions by secreting the effector XopAK to promote its own infection.

关键词： pathogen effector plant immunity bacterial leaf streak metal ion

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Hepatic steatosis is associated with dysregulated cholesterol metabolism and altered protein acetylation dynamics in chickens

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Journal of Animal Science and Biotechnology 2024年第1期15卷 53-67页

作者： Xiaoli Guo Qianqian Zhou Jiaming Jin Fangren Lan Chaoliang Wen Junying Li Ning Yang Congjiao Sun National Engineering laboratory for Animal Breeding and Key laboratory of Animal genetics Breeding and ReproductionMinistry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing 100193China

Background Hepatic steatosis is a prevalent manifestation of fatty liver, that has detrimental effect on the health and productivity of laying hens, resulting in economic losses to the poultry industry. Here, we aimed to systematically investigate the genetic regulatory mechanisms of hepatic steatosis in laying *** Ninety individuals with the most prominent characteristics were selected from 686 laying hens according to the accumulation of lipid droplets in the liver, and were graded into three groups, including the control, mild hepatic steatosis and severe hepatic steatosis groups. A combination of transcriptome, proteome, acetylome and lipidome analyses, along with bioinformatics analysis were used to screen the key biological processes, modifications and lipids associated with hepatic *** The rationality of the hepatic steatosis grouping was verified through liver biochemical assays and RNA-seq. Hepatic steatosis was characterized by increased lipid deposition and multiple metabolic abnormalities. Integration of proteome and acetylome revealed that differentially expressed proteins(DEPs) interacted with differentially acetylated proteins(DAPs) and were involved in maintaining the metabolic balance in the liver. Acetylation alterations mainly occurred in the progression from mild to severe hepatic steatosis, i.e., the enzymes in the fatty acid oxidation and bile acid synthesis pathways were significantly less acetylated in severe hepatic steatosis group than that in mild group(P < 0.05). Lipidomics detected a variety of sphingolipids(SPs) and glycerophospholipids(GPs) were negatively correlated with hepatic steatosis(r ≤-0.5, P < 0.05). Furthermore, the severity of hepatic steatosis was associated with a decrease in cholesterol and bile acid synthesis and an increase in exogenous cholesterol *** In addition to acquiring a global and thorough picture of hepatic steatosis in laying hens, we were able to reveal the role of ac

关键词： Acetylation Cholesterol metabolism Hepatic steatosis Laying hens Multiomics

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ChMYB1-ChbHLH42-ChTTG1 module regulates abscisic acidinduced anthocyanin biosynthesis in Cerasus humilis

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Horticultural Plant Journal 2024年第1期10卷 51-65页

作者： Xiaolong Ji Zhe Li Mingyu Zhang Shaoyu Lang Xingshun Song State Key laboratory of Tree genetics and Breeding Northeast Forestry UniversityHarbinHeilongjiang 150040China Department of genetics College of Life ScienceNortheast Forestry UniversityHarbinHeilongjiang 150040China

Cerasus humilis is a kind of economic fruit tree peculiar to China,which is widely used in the food,landscape,and pharmaceutical *** are a phenolic metabolite that plays an essential role in fruit ***,the regulatory network of *** in anthocyanin biosynthesis is still *** this study,the R2R3-MYB transcription factor ChMYB1 was isolated from the full genome of the *** one-hybrid,dual-luciferase assays,and GUS staining showed that ChMYB1 significantly increased anthocyanin contents in *** fruit by promoting the expression of ChCHS and ChUFGT by binding MBS(MYB-binding elements).ChMYB1 interacted with ChbHLH42and ChTTG1 to form the MBW complex and further enhanced the expression of *** addition,abscisic acid(ABA)treatment promoted the expression of ChMYB1 and anthocyanin accumulation in *** ***,ABA treatment enhanced the interaction between ChMYB1 and ***,ChABI5 inhibited the interaction between ChMYB1 and *** data elucidated the primary molecular mechanism of anthocyanin biosynthesis in *** fruit,deepening the understanding of the regulatory network affecting anthocyanin metabolism in edible fruit crops.

关键词： Cerasus humilis Anthocyanin ChMYB1 Fruit ABA

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The human-derived novel gut commensal Luoshenia tenuis regulates body weight and food intake in mice

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Food Science and Human Wellness 2024年第2期13卷 830-841页

作者： Yu Jiang Mengxuan Du Lisheng Xie Minzhi Jiang Yaokun Zhang Mingxia Bi Chang Liu Hongwei Liu Shuangjiang Liu State Key laboratory of Microbial Technology Shandong UniversityQingdao 266237China State Key laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China College of Life Science Hebei UniversityBaoding 071000China State Key laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China

Many studies have revealed that gut microbes modulate host *** this study,we characterized the therapeutic effects of a novel gut commensal Luoshenia tenuis against host metabolic ***,by in silico analysis,we demonstrated that the *** was prevalent in the gut microbiomes of healthy humans but were depleted specifically in obesity *** in vitro cultivation revealed that *** produced short chain fatty acids that were verified to modulate host metabolism and some other volatile metabolites to benefit hosts by anti-inflammation and ***,gavage of the *** significantly decreased the body weight gain and food intake of high-fat diet-feeding C57BL/6J mice,which was in parallel with the changed expression level of genes related to satiety and feeding *** then performed the gavage trial using diet induced obese mice,and it revealed that the administration of *** alleviated significantly the abnormal glucose and lipid metabolisms and reduced the inflammatory *** summary,this study revealed a previously-unknown human gut commensal microbe that benefited host metabolism,and set the stage for the development of novel next-generation probiotic applicable for treatment of obesity and related metabolic disorders.

关键词： Luoshenia tenuis Gut microbe Feeding behavior Obesity Next-generation probiotic

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Gut microbial interactions based on network construction and bacterial pairwise cultivation

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Science China(Life Sciences) 2024年第8期67卷 1751-1762页

作者： Min-Zhi Jiang Chang Liu Chang Xu He Jiang Yulin Wang Shuang-Jiang Liu State Key laboratory of Microbial Technology Shandong UniversityQingdao 266000China State Key laboratory of Microbial Resources and Environmental Microbiology Research Center(EMRC)Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Association networks are widely applied for the prediction of bacterial interactions in studies of human gut ***,the experimental validation of the predicted interactions is challenging due to the complexity of gut microbiomes and the limited number of cultivated *** this study,we addressed this challenge by integrating in vitro time series network(TSN)associations and cocultivation of TSN taxon *** samples were collected and used for cultivation and enrichment of gut microbiome on YCFA agar plates for 13 *** cells were harvested for DNA extraction and metagenomic sequencing.A total of 198 metagenome-assembled genomes(MAGs)were *** dynamics of bacteria growing on the YCFA agar were used to infer microbial association *** experimentally validate the interactions of taxon pairs in networks,we selected 24 and 19 bacterial strains from this study and from the previously established human gut microbial biobank,respectively,for pairwise *** co-culture experiments revealed that most of the interactions between taxa in networks were identified as neutralism(51.67%),followed by commensalism(21.67%),amensalism(18.33%),competition(5%)and exploitation(3.33%).Genome-centric analysis further revealed that the commensal gut bacteria(helpers and beneficiaries)might interact with each other via the exchanges of amino acids with high biosynthetic costs,short-chain fatty acids,and/or *** also validated 12 beneficiaries by adding 16 additives into the basic YCFA medium and found that the growth of 66.7%of these strains was significantly *** approach provides new insights into the gut microbiome complexity and microbial interactions in association *** work highlights that the positive relationships in gut microbial communities tend to be overestimated,and that amino acids,short-chain fatty acids,and vitamins are contributed to the positive relationships.

关键词： human gut microbiome gut microbial pairwise interaction co-culture association network microbial community

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NODULATION TRIO in Medicago truncatula:Unveiling the redundant roles of MtLYK2,MtLYK3,and MtLYK2bis

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Journal of Integrative Plant Biology 2024年第8期66卷 1553-1556页

作者： Yaohua Li Yanwen Zhao Ziang Yan Ru Dong Haixiang Yu Hui Zhu Yangrong Cao National Key Lab of Agricultural microbiology Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China

The legume–rhizobial symbiosis is a distinctive model in plant–microbe *** being foreign invaders,rhizobia are acknowledged as“friends”by compatible host plants,leading to mutualistic endosymbiosis(Cao et al.,2017).

关键词： mutual spite redundant

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Cross-linkedα-amylase aggregates on Fe3O4 magnetic nanoparticles modified with polydopamine/polyethyleneimine for efficient hydrolysis of starch

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Particuology 2024年第7期90卷 98-105页

作者： Jiandong Cui Xiuming Tang Qingqing Ma Yuyan Chang Qunli Zhang Shiru Jia State Key laboratory of Food Nutrition and Safety Laboratory of Industrial Fermentation MicrobiologyMinistry of EducationTianjin University of Science and TechnologyTianjin 300457China Key laboratory of Biomass Chemical Engineering of Ministry of Education Zhejiang UniversityHangzhou 310027China

In this workα-amylase was immobilized on magnetic Fe3O4 nanoparticles with polyethylenimine(PEI)/polydopamine(PDA)coating or 3-aminopropyl triethoxysilane(APTES)for the first time via adsorption–precipitation–*** with the freeα-amylase,the resultant magnetic cross-linkedα-amylase aggregates(PEI/PDA-M-CLEAs and N-M-CLEAs)exhibited excellent thermal and storage stability as well as pH *** storage at 25°C for 60 days,freeα-amylase only retained 60%of its initial activity,while PEI/PDA-M-CLEAs and N-M-CLEAs retained 80%and 78%of their initial activities,***,N-M-CLEAs and PEI/PDA-M-CLEAs showed good *** 6 repeated uses,PEI/PDA-M-CLEAs and N-M-CLEAs still maintained 65%and 62%of their initial activities,***,PEI/PDA-M-CLEAs and N-M-CLEAs exhibited higher starch hydrolysis efficiency than freeα-*** maximum dextrose equivalent(DE)values of starch hydrolysis by PEI/PDA-M-CLEAs and N-M-CLEAs reached 29.24%and 28.79%within 90 min,***,the maximum DE values of starch hydrolysis by the freeα-amylase was only 27.89%even in 150 *** magnetic cross-linkedα-amylase aggregates could be introduced as effective biocatalyst for industrial applications in production of maltose syrups.

关键词： α-amylase Magnetic nanoparticles Functional modification Magnetic cross-linked enzyme aggregates Hydrolysis of starch

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Integrated application of synthetic community reduces consumption of herbicide in field Phalaris minor control

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Soil Ecology Letters 2024年第2期6卷 125-136页

作者： Amina Hadayat Zahir Ahmad Zahir Peng Cai Chun-Hui Gao National Key laboratory of Agricultural microbiology College of Resources and EnvironmentHuazhong Agricultural UniversityWuhan430070China Soil microbiology and Biochemistry laboratory Institute of Soil and Environmental SciencesUniversity of AgricultureFaisalabadPakistan

Herbicide-based weeds control impacts wheat crops as *** of Pseudomonas strains reduce the need for high-dose herbicides.100%Axial provides less weed control compared to 75%Axial with C4 *** 75%with C4 SynCom promotes... 详细信息

关键词： weed control synthetic microbial communities Phalaris minor wheat growth promotion synergistic effect

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