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Effects of enrichmemt planting with native tree species on bacterial community structure and potential impact on Eucalyptus plantations in southern China

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Journal of Forestry Research 2022年第4期33卷 1349-1363页

作者： Yuxing Xu Chao Li Wankuan Zhu Zhichao Wang Lichao Wu Apeng Du Key Laboratory of Soil and Water Conservation and Desertifi cation Combating of Hunan Province College of ForestryCentral South University of Forestry and TechnologyChangshaHunan 410004People’s Republic of China China Eucalypt Research Centre(CERC) Chinese Academy of Forestry(CAF)ZhanjiangGuangdong 524022People’s Republic of China Guangdong Zhanjiang Eucalyptus Plantation Ecosystem Research Station ZhanjiangGuangdong 524022People’s Republic of China

Multi-generational planting of Eucalyptus species degrades soil quality but the introduction of legumes can improve soil fertility and microbial ***,the effects of introducing non-legume native tree species on soil nutrients and bacterial community structure remain poorly *** study investigated the impacts of the conversion of third generation monoculture Eucalyptus plantations to mixed systems including Eucalyptus urograndis with Cinnamomum camphora(EC)and *** with Castanopsis hystrix(EH),on soil chemical and biochemical properties and bacterial community structure,diversity and *** generation *** plantations were the *** show that planting the third generation Eucalyptus led to a significant decrease in p H,organic matter,nutrient content,enzyme activities(invertin,acid phosphataes,and urease),and bacterialα-diversity compare to the ***,the mixed planting showed significant improvement in soil chemical and biochemical attributes and bacterialα-diversity,although the *** and *** planting had no ***(oligotrophic bacteria)were significantly enriched in third generation Eucalyptus and Eucalyptus+***,while proteobacteria increased significantly in the *** with *** *** relative abundance of multiple metabolic pathways increased significantly in the third generation Eucalyptus plantations whereas membrane transportrelated genes were enriched in soils of the mixed *** changes in bacterial community structures in the two mixed systems were driven by diversity,organic matter and acid phosphatase,while bacterial functions were affected by invertase,NO_(3)^(-)-N,diversity and *** results suggest that the transformation of successive monoculture Eucalyptus plantations into mixed plantations reduces the depletion of soil nutrients and enhances the ecological function of soil microorganisms.

关键词： Soil chemical propertie Enzyme activity 16S rRNA amplicon sequencing bacterial community structure Tax4Fun function prediction

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Screening and degrading characteristics and community structure of a high molecular weight polycyclic aromatic hydrocarbon-degrading bacterial consortium from contaminated soil

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Journal of Environmental Sciences 2010年第10期22卷 1576-1585页

作者： Run Sun Jinghua Jin Guangdong Sun Ying Liu Zhipei Liu State Key Laboratory of Microbial Resources Institute of Microbiology Chinese Academy of Sciences Beijing 100101 China. Environmental Protection Research Institute of Light Industry Beijing 100089 China

Inoculation with efficient microbes had been proved to be the most important way for the bioremediation of polluted environments. For the treatment of abandoned site of Beijing Coking Chemical Plant contaminated with high level of high-molecular-weight polycyclic aromatic hydrocarbons （HMW-PAHs）, a bacterial consortium capable of degrading HMW-PAHs, designated 1-18-1, was enriched and screened from HMW-PAHs contaminated soil. Its degrading ability was analyzed by high performance liquid chromatography （HPLC）, and the community structure was investigated by construction and analyses of the 16S rRNA gene clone libraries （A, B and F） at different transfers. The results indicated that 1-18-1 was able to utilize pyrene, fluoranthene and benzo[a]pyrene as sole carbon and energy source for growth. The degradation rate of pyrene and fluoranthene reached 82.8% and 96.2% after incubation for 8 days at 30℃, respectively; while the degradation rate of benzo[a]pyrene was only 65.1% after incubation for 28 days at 30℃. Totally, 108, 100 and 100 valid clones were randomly selected and sequenced from the libraries A, B, and E Phylogenetic analyses showed that all the clones could be divided into 5 groups, Bacteroidetes, ct-Proteobacteria, Actinobacteria, β-Proteobacteda and γ- Proteobacteria. Sequence similarity analyses showed total 39 operational taxonomic units （OTUs） in the libraries. The predominant bacterial groups were α-Proteobacteria （19 OTUs, 48.7%）, γ-Proteobacteria （90TUs, 23.1%） and β-Proteobacteria （80TUs, 20.5%）. During the transfer process, the proportions of α-Proteobacteria and β-Proteobacteria increased greatly （from 47% to 93%）, while γ-Proteobacteda decreased from 32% （library A） to 6% （library F）; and Bacteroidetes group disappeared in libraries B and F.

关键词： high-molecular-weight-PAHs bacterial consortium bacterial community structure 16S rRNA gene library

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Inclusion of peanut in wheat–maize rotation increases wheat yield and net return and improves soil organic carbon pool by optimizing bacterial community

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Journal of Integrative Agriculture 2023年第11期22卷 3430-3443页

作者： ZOU Xiao-xia HUANG Ming-ming LIU Yan SI Tong ZHANG Xiao-jun YU Xiao-na GUO Feng WAN Shu-bo Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Peanut Industry Collaborative Innovation Center/College of Agronomy Qingdao Agricultural UniversityQingdao 266109P.R.China Institute of Crop Germplasm Resources Shandong Academy of Agricultural SciencesJinan 250100P.R.China

Improving soil quality while achieving higher productivity is the major challenge in the agricultural industry. Wheat(Triticum aestivum L.)–maize(Zea mays L.)(W–M) rotation is the dominant planting pattern in the Huang-HuaiHai Plain and is important for food security in China. However, the soil quality is deteriorating due to the W–M rotation’s long-term, intensive, and continuous cultivation. Introducing legumes into the W–M rotation system may be an effective way to improve soil quality. In this study, we aimed to verify this hypothesis by exploring efficient planting systems(wheat–peanut(Arachis hypogaea L.)(W–P) rotation and wheat rotated with maize and peanut intercropping(W–M/P)) to achieve higher agricultural production in the Huang-Huai-Hai Plain. Using traditional W–M rotation as the control, we evaluated crop productivity, net returns, soil microorganisms(SMs), and soil organic carbon(SOC) fractions for three consecutive years. The results indicated that wheat yields were significantly increased under W–P and W–M/P(382.5–579.0 and 179.8–513.1 kg ha-1, respectively) compared with W–M. W–P and W–M/P provided significantly higher net returns(58.2 and 70.4%, respectively) than W–M. W–M/P and W–M retained the SOC stock more efficiently than W–P, increasing by 25.46–31.03 and 14.47–27.64%, respectively, in the 0–20 cm soil layer. Compared with W–M, W–M/P improved labile carbon fractions;the sensitivity index of potentially mineralizable carbon, microbial biomass carbon(MBC), and dissolved organic carbon was 31.5, 96.5–157.2, and 17.8% in 20–40, 10–40, and 10–20 cm soil layers, respectively. The bacterial community composition and bacteria function were altered as per the soil depth and planting pattern. W–M/P and W–M exhibited similar bacterial community composition and function in 0–20 and 20–40 cm soil layers. Compared with W–P, a higher abundance of functional genes, namely, contains mobile elements and stress-tolerant, and a lower abundance of genes, namely,

关键词： composite planting carbon sequestration labile carbon fraction bacterial community structure bacterial functions

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Vertical distribution patterns and drivers of soil bacterial communities across the continuous permafrost region of northeastern China

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Ecological Processes 2022年第1期11卷 38-50页

作者： Baihui Ren Yuanman Hu Rencang Bu Shenyang Agricultural University ShenyangChina CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesNo.72Wenhua RoadShenyang 110016LiaoningChina

Background:Soil microorganisms in the thawing permafrost play key roles in the maintenance of ecosystem function and regulation of biogeochemical ***,our knowledge of patterns and drivers of permafrost micro-bial communities is limited in northeastern ***,we investigated the community structure of soil bacteria in the active,transition and permafrost layers based on 90 soil samples collected from 10 sites across the continuous permafrost region using high-throughput Illumina ***:Proteobacteria(31.59%),Acidobacteria(18.63%),Bacteroidetes(9.74%),Chloroflexi(7.01%)and Actinobacteria(6.92%)were the predominant phyla of the bacterial community in all soil layers;however,the relative abundances of the dominant bacterial taxa varied with soil *** bacterial community alpha-diversity based on the Shannon index and the phylogenetic diversity index both decreased significantly with depth across the transition from active layer to permafrost *** multidimensional scaling analysis and permutation multivariate analysis of variance revealed that microbial community structures were significantly different among *** analysis and Spearman’s correlation analysis showed that soil properties differed between layers such as soil nutrient content,temperature and moisture mainly drove the differentiation of bacterial ***:Our results revealed significant differences in bacterial composition and diversity among soil *** findings suggest that the heterogeneous environmental conditions between the three soil horizons had strong influences on microbial niche differentiation and further explained the variability of soil bacterial community *** effort to profile the vertical distribution of bacterial communities may enable better evaluations of changes in microbial dynamics in response to permafrost thaw,which would be beneficial to ecological conservation of permafrost ecosystems.

关键词： Permafrost Soil depth bacterial community structure Soil properties Illumina sequencing

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Enhanced nitrogen removal at low temperature with mixed anoxic/oxic process

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Water Science and Engineering 2023年第1期16卷 67-75页

作者： Xiang-kun Li Ying-jun Yang Gai-ge Liu Dou-dou Sun Xiao-chen Ma School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China School of Environment Harbin Institute of TechnologyHarbin 150090China

Different hydraulic retention times(HRTs)were tested in a mixed anoxic/oxic(A/O)system at 5C and 10C to investigate the effects of HRT and carrier on nitrogen removal in wastewater at low *** results showed that the addition of the fillers improved the treatment effect of each index in the *** an optimal HRT of 7.5 h at 5C,the removal efficiencies of NHþ4-N and total nitrogen(TN)reached 91.2%and 75.6%,*** an HRT of 6 h at 10C,the removal efficiencies of NHþ4-N and TN were 96.7%and 82.9%,*** results of high-throughput sequencing showed that the addition of the suspended carriers in the aerobic zone could improve the treatment efficiency of nitrogen at low *** microbial analysis indicated that the addition of the suspended carriers enhanced the enrichment of nitrogen removal ***,Nitrotoga,and Nitrosomonas were found to be the bacteria responsible for nitrification,and their relative concentrations on the biofilm at 5C and 10C accounted for 98.11%,92.79%,and 69.98%of all biological samples,respectively.

关键词： Domestic sewage Low temperature Mixed A/O process Nitrogen removal bacterial community structure

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Influence of cadmium and copper mixtures to rhizosphere bacterial communities

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Soil Ecology Letters 2023年第1期5卷 94-107页

作者： Qirui An Yunyang Li Na Zheng Jincai Ma Shengnan Hou Siyu Sun Sujing Wang Pengyang Li Xiaoqian Li Chunmei Zhao Key Laboratory of Groundwater Resources and Environment of the Ministry of Education College of Environment and ResourcesJilin UniversityChangchun 130021China Northeast Institute of Geography and Agricultural Ecology Chinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen UniversityGuangzhou 510006China

To study the effects of combined Cd and Cu pollution on rhizosphere bacterial ***-throughput sequencing was used to examine the response of rhizosphere bacterial communities to heavy-metal stress under single and mixed pollution of cadmium(Cd)and copper(Cu).With additions of Cd and Cu,the mean diversity index of rhizosphere bacterial community was in the order Cu alone>Cd-Cu mixtures>Cd *** all Cd and Cu treatments,the dominant phyla were Proteobacteria,Actinobacteria,Chloroflexi and *** the additions with different concentrations of Cd-Cu mixtures,LEfSe indicated that there were differences in the predominant species of rhizosphere bacterial *** genera such as Streptomyces and Microbacterium belonging to Actinobacteria as biomarkers were significantly enriched in both control and treatments,while some genera such as Pseudoxanthomonas and Rhodopseudomonas belonging to Proteobacteria as biomarkers were observed to be enriched in the additions with single and mixture of Cd and *** to the Nonmetric multidimensional scaling(NMDS)analysis,the structure of rhizosphere bacterial community was different between treatments and the *** Component Analysis(PCA)and permutational multivariate analysis of variance(PERMANOVA)showed that there were significant differences among treatments(pbacterial communities.

关键词： Cadmium Copper High-throughput sequencing bacterial community structure

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Influence of pore structure on biologically activated carbon performance and biofilm microbial characteristics

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Frontiers of Environmental Science & Engineering 2021年第6期15卷 391-403页

作者： Yuqing Xu Zedong Lu Wenjun Sun Xiaohui Zhang School of Environment Tsinghua UniversityBeijing 100084China Research Institute for Environmental Innovation(Suzhou)Tsinghua Suzhou 215163China Institute of Carbon Materials Science Shanxi Datong UniversityDatong 037009China

Optimizing the characteristics of granular activated carbon(GAC)can improve the performance of biologically activated carbon(BAC)filters,and iodine value has always been the principal index for GAC ***,in this study,among three types of GAC treating the same humic acidcontaminated water,one had an iodine value 35%lower than the other two,but the dissolved organic carbon removal efficiency of its BAC was less than 5%away from the *** value was found to influence the removal of different organic fractions instead of the total removal *** on the removal and biological characteristics,two possible mechanisms of organic matter removal during steady-state were *** GAC with poor micropore volume and iodine value,high molecular weight substances(3500–9000 Da)were removed mainly through degradation by microorganisms,and the biodegraded organics(soluble microbial by-products,community structure was coordinate with both the pore structure and the organic removal *** findings provide a theoretical basis for selecting GAC for the BAC process based on its pore structure.

关键词： Granular activated carbon Biologically activated carbon filter bacterial community structure Pore structure

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Effect of Rhizobacterium Rhodopseudomonas palustris Inoculation on Stevia rebaudiana Plant Growth and Soil Microbial community

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Pedosphere 2018年第5期28卷 793-803页

作者： XU Jiangbing FENG Youzhi WANG Yanling LIN Xiangui International Center for Ecology Meteorologyand Environment (IceMe)School of Applied MeteorologyNanjing University of Information Science and Technology State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of Sciences

There is an increasing concern that the continuous use of chemical fertilizers might lead to harmful effects on soil ***, a biocompatible approach involving inoculation of beneficial microorganisms is presented to promote plant growth and simultaneously minimize the negative effect of chemical fertilizers. In this study, Rhodopseudomonas palustris, a plant growth-promoting rhizobacterium(PGPR), was inoculated into both fertilized and unfertilized soils to assess its influence on Stevia rebaudiana plant growth and microbial community in rhizosphere soils in a 122-d field experiment. Soil enzyme assays(dehydrogenase, urease, invertase, and phosphomonoesterase), real-time quantitative polymerase chain reaction(RT-_qPCR), and a high-throughput sequencing technique were employed to determine the microbial activity and characterize the bacterial community. Results showed that the *** inoculation did not significantly influence Stevia yields and root biomass in either the fertilized or unfertilized soil. Chemical fertilization had strong negative effects on soil bacterial community properties, especially on dehydrogenase and urease ***, R. palustris inoculation counteracted the effect of chemical fertilizer on dehydrogenase and urease activities, and increased the abundances of some bacterial lineages(including Bacteroidia, Nitrospirae, Planctomycetacia, Myxococcales, and Legionellales). In contrast, inoculation into the unfertilized soil did not significantly change the soil enzyme activities or the soil bacterial community structure. For both the fertilized and unfertilized soils, R. palustris inoculation decreased the relative abundances of some bacterial lineages possessing photosynthetic ability, such as Cyanobacteria, Rhodobacter, Sphingomonadales, and Burkholderiales. Taken together, our observations stress the potential utilization of R. palustris as PGPR in agriculture, which might further ameliorate the soil microbial prop

关键词： bacterial community structure beneficial microorganism chemical fertilization plant growth-promoting rhizobacterium,soil enzyme activity

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Diversity and Characterization of Potential H_2-Dependent Fe(Ⅲ)-Reducing Bacteria in Paddy Soils

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Pedosphere 2012年第5期22卷 673-680页

作者： LI Hui-Juan PENG Jing-Jing LI Hong-Bo Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021(China) Graduate University of Chinese Academy of Sciences Beijing 100059(China)

Microbial ferric iron reduction, with organic carbon or hydrogen as the electron donor, is one of the most important biogeochemical processes in anoxic paddy soils; however, the diversity and community structure of hydrogen-dependent dissimilatory iron-reducers remain unknown. Potential H2-dependent Fe（III）-reducing bacteria in paddy soils were explored using enrichment cultures with ferrihydrite or goethite as the electron acceptor and hydrogen as the electron donor. Terminal restriction fragment length polymorphism （T-RFLP） analysis and cloning/sequencing were conducted to reveal bacterial community structure. Results showed that Geobacter and Clost^dium were the dominant bacteria in the enrichment cultures. Fe（III） oxide mineral phases showed a strong effect on the community structure; Geobaeter and Clostridium were dominant in the ferrihydrite treatment, while Glostridium spp. were dominant in the goethite treatment. These suggested that H2-dependent Fe（lII）-redueing bacteria might be widely distributed in paddy soils and that besides Geobacter, Clostmdium spp. might also be an important group of H2-dependent Fe（III）-reducing microorganisms.

关键词： bacterial community structure Clostridium enrichment culture Geobaeter , terminal restriction fragment length poly-morphism

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Spatial and seasonal variations in bacterial communities of the Yellow Sea by T-RFLP analysis

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Frontiers of Environmental Science & Engineering 2009年第2期3卷 194-199页

作者： Hongyuan WANG Xiaolu JIANG Ya HE Huashi GUAN School of Medicine and Pharmacy Ocean University of ChinaQingdao 266003China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural ScienceBeijing 100081China School of Environment Beijing Normal UniversityBeijing 100875China

Four typical coastal sites(rocky shore,sandy shore,mud flat shore,and artificial harbor)at the Yellow Sea were chosen to investigate the spatial and seasonal variations in bacterial *** was accomplished by using terminal restriction fragment length polymorphism(T-RFLP)analysis of PCR amplified 16S rDNA *** kinds of tetrameric restriction enzymes,HhaI and MspI,were used in the experiment to depict the bacterial community diversity in different marine *** was found that the community compositions digested by the two enzymes separately were ***,the results of bacterial community diversity derived from them were *** MDA analysis results of T-RFLP profiles coming from HhaI and MspI both exhibited a significant seasonal community shift for bacteria and a relatively low spatial variation among the four *** HhaI as the sample,the pair wise Ttests also revealed that variations were minor between each pair of marine environments,with R ranging from 0.198 to ***,the bacterial community structure in the mud flat site depicted a larger difference than each of the other three sites(R ranging from 0.282 to 0.349).

关键词： terminal restriction fragment length polymorphism(T-RFLP) bacterial community structure marine microbial diversity HhaI MspI

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