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Removal of metals by sorghum plants from contaminated land

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Journal of Environmental Sciences 2009年第10期21卷 1432-1437页

作者： ZHUANG Ping shu wensheng LI Zhian LIAO Bin LI Jintian SHAO Jingsong Institute of Ecology South China Botanic Garden Chinese Academy of Sciences Guangzhou 510560 China. School of Life Sciences and State Key Laboratory of Biocontrol Sun Yat-sen University Guangzhou 510275 China

The growth of high biomass crops facilitated by optimal of agronomic practices has been considered as an alternative to phytoremediation of soils contaminated by heavy metals. A field trial was carded out to evaluate the phytoextraction efficiency of heavy metals by three varieties of sweet sorghum （Sorghum biocolor L.）, a high biomass energy plant. Ethylene diamine tetraacetate （EDTA）, ammonium nitrate （NH4NO3） and ammonium sulphate （（NH4）2SO4） were tested for their abilities to enhance the removal of heavy metals Pb, Cd, Zn, and Cu by sweet sorghum from a contaminated agricultural soil. Sorghum plants always achieved the greatest removal of Pb by leaves and the greatest removal of Cd, Zn and Cu by stems. There was no significant difference among the Keller, Rio and Mray varieties of sweet sorghums in accumulating heavy metals. EDTA treatment was more efficient than ammonium nitrate and ammonium sulphate in promoting Pb accumulation in sweet sorghum from the contaminated agricultural soil. The application of ammonium nitrate and ammonium sulphate increased the accumulation of both Zn and Cd in roots of sorghum plants. Results from this study suggest that cropping of sorghum plants facilitated by agronomic practices may be a sustainable technique for partial decontamination of heavy metal contaminated soils.

关键词： Sorghum biocolor field trial phytoextraction

Spatial scaling of soil microbial co-occurrence networks in a fragmented landscape

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mLife 2023年第2期2卷 209-215页

作者： Pandeng Wang Shao-Peng Li Xian Yang Xingfeng Si Wen-Jun Li wensheng shu Lin Jiang State Key Laboratory of Biocontrol School of Ecology&School of Life SciencesSun Yat‐Sen UniversityGuangzhouChina School of Biological Sciences Georgia Institute of TechnologyAtlantaGeorgiaUSA Zhejiang Tiantong Forest Ecosystem National Observation and Research Station School of Ecological and Environmental SciencesEast China Normal UniversityShanghaiChina Institute of Eco‐Chongming(IEC) ShanghaiChina School of Life Sciences South China Normal UniversityGuangzhouChina

Impact statement Habitat loss has been a primary threat to ***,species do not function in isolation but often associate with each other and form complex ***,revealing how the network complexity and stability scale with habitat area will give us more insights into the effects of habitat loss on *** this study,we explored the relationships between the island area and the network complexity and stability of soil *** found that the complexity and stability of soil microbial co‐occurrence networks scale positively with island area,indicating that habitat loss will potentially simplify and destabilize soil microbial networks.

关键词： soil habitat networks

Resistance potential of soil bacterial communities along a biodiversity gradient in forest ecosystems

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mLife 2022年第4期1卷 399-411页

作者： Jialiang Kuang Dongmei Deng shun Han Colin T.Bates Daliang Ning wensheng shu Jizhong Zhou The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhouChina Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA State Key Laboratory of Biocontrol Guangdong Key Laboratory of Plant Resources and Conservation of Guangdong Higher Education InstitutesCollege of Ecology and EvolutionSun Yat-sen UniversityGuangzhouChina Guangxi Key Laboratory of Green Processing of Sugar Resources College of Biological and Chemical EngineeringGuangxi University of Science and TechnologyLiuzhouChina School of Life Sciences South China Normal UniversityGuangzhouChina School of Civil Engineering and Environmental Sciences University of OklahomaNormanOklahomaUSA School of Computer Sciences University of OklahomaNormanOklahomaUSA.8Earth and Environmental SciencesLawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA.

Higher biodiversity is often assumed to be a more desirable scenario for maintaining the functioning of ecosystems,but whether species-richer communities are also more disturbance-tolerant remains *** this study,we investigated the bacterial communities based on 472 soil samples from 28 forests across China with associated edaphic and climatic *** developed two indexes(i.e.,community mean tolerance breadth[CMTB]and community mean response asynchrony[CMRA])to explore the relationship between diversity and community resistance ***,we examined this resistance potential along the climatic and latitudinal *** revealed that CMTB was significantly and negatively related to species richness,resulting from the changes in balance between relative abundances of putative specialists and *** comparison,we found a unimodal relationship between CMRA and richness,suggesting that higher biodiversity might not always lead to higher community ***,our results showed differential local patterns along *** particular,local patterns in the northern region mainly followed general relationships rather than those for the southern forests,which may be attributed to the differences in annual means and annual variations of climate *** findings highlight that the community resistance potential depends on the composition of diverse species with differential environmental tolerance and *** study provides a new,testable evaluation by considering tolerance breadth and response asynchrony at the community level,which will be helpful in assessing the influence of disturbance under rapid shifts in biodiversity and species composition as a result of global environmental change.

关键词： ecological resistance forest soil bacterial community latitudinal gradient specialist–generalist balance species richness

Remediation of manganese contaminated soil by microorganism with Broussonetia papyrifera

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Remediation of manganese contaminated soil by microorganism ...

Comparative genomic analysis of Thermus provides insights into the evolutionary history of an incomplete denitrification pathway

第十届重金属污染防治技术及风险评价研讨会

作者： Fan Li Zhao Yunlin shu wensheng Huang Huimin Xu Zhenggang Hunan Research Center of Engineering Technology for Utilization of Environmental and Resources Plant Central South University of Forestry and Technology

To combine phytoremediation plants and microorganisms is a promising method of repairing heavy metal contaminated *** this study,two manganese-tolerant strains isolated from Mn slag and identified as *** HM5 and *** *** two Bacillus *** have the ability to dissolve phosphorus,produce IAA and iron carrier.A pot experiment of Broussonetia papyrifera was conducted to test the growth,root structure and activity,and accumulation of Mn with *** HM5 and *** HM7 inoculation under the pollution of heavy metal Mn(5 mmol/L,50 mmol/L,wild Mn slag).Besides,the physiological and biochemical characteristics of the leaves and the effects of the soil environment were *** results showed that the biomass,total root length,surface area,crossings,tips,forks and root activity of *** with inoculation were higher than those of the uninoculated control *** inoculation of these two Bacillus *** the absorption of Mn by *** and the concentration of Mn in the aerial parts of plants,indicating that the two strains could promote the growth of *** and the accumulation of *** addition,microbes reduced MDA content,CAT,SOD,and POD activities in leaves,suggesting that the two Bacillus *** Mn-induced oxidative *** principal component analysis showed that the added Bacillus strain prefer to promote plant root function maintenance and improve soil environment,rather than direct adsorption of heavy *** observations indicated that *** HM5 and *** HM7 were valuable microorganisms,which could effectively improve the repair efficiency of *** under Mn-contaminated soil.

关键词： Bacillus spp. Broussonetia papyrifera Manganese stress Physiological response phytoremediation

来源： cnki会议评论

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mLife 2022年第2期1卷 198-209页

作者： Jian-Yu Jiao Zheng-Han Lian Meng-Meng Li Nimaichand Salam En-Min Zhou Lan Liu Hong Ming Guoxing Nie wensheng shu Guoping Zhao Brian P.Hedlund Wen-Jun Li State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)School of Life SciencesSun Yat-Sen UniversityGuangzhouChina International Joint Research Center for Karstology School of Earth SciencesYunnan UniversityKunmingChina Synthetic Biology Engineering Laboratory of Henan Province College of Life Sciences and TechnologyXinxiang Medical UniversityXinxiangChina College of Fisheries Henan Normal UniversityXinxiangChina Institute of Ecological Science School of Life ScienceSouth China Normal UniversityGuangzhouChina Institute of Synthetic Biology Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina School of Life Sciences University of NevadaLas VegasNevadaUSA Nevada Institute of Personalized Medicine University of NevadaLas VegasNevadaUSA State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqiChina

Biological denitrification is a crucial process in the nitrogen biogeochemical cycle,and Thermus has been reported to be a significant heterotrophic denitrifier in terrestrial geothermal ***,neither the denitrification potential nor the evolutionary history of denitrification genes in the genus Thermus or phylum Deinococcota is well ***,we performed a comparative analysis of 23 Thermus genomes and identified denitrification genes in 15 Thermus *** confirmed that Thermus harbors an incomplete denitrification pathway as none of the strains contain the nosZ *** character state reconstructions and phylogenetic analyses showed that narG,nirS,and norB genes were acquired by the last common ancestor of Thermales and were inherited *** contrast,nirK of Thermales was acquired via two distinct horizontal gene transfers from Proteobacteria to the genus Caldithermus and from an unknown donor to the common ancestor of all known Thermus species except Thermus *** study expands our understanding of the genomic potential for incomplete denitrification in Thermus,revealing a largely vertical evolutionary history of the denitrification pathway in the Thermaceae,and supporting the important role for Thermus as an important heterotrophic denitrifier in geothermal environments.

关键词： comparative genomics denitrification evolutionary history Thermus

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污水排放对红树林湿地生态系统的影响

生态学杂志 2000年第2期19卷 13-19页

作者：黄立南蓝崇钰束文圣中山大学环境科学系广州510275 中山大学生命科学学院广州510275

In order to study the feasibility of using mangrove wetland as a facility for sewage treatment and the effects of wastewater discharge on soil and plants of the mangrove ecosystem,the field work was conducted during December 1994 to December 1995 in a mangrove wetland in Futian national nature reserve in Shenzhen. Two parallel elongated sites (sites A and B, each 180m×10m) stretching from land to sea were chosen for study. Since December 1994, Site A was continuously irrigated with municipal sewage every two days,while Site B served as a control. The ecological impact of sewage discharge on the mangrove wetland was assessed by comparing the plant growth, nutrients of soils and vegetation between Site A and Site B. One year later, total-N and NH 4 +-N in the soil increased and EC decreased significantly at Site A. And obvious changes in pH value and other nutrient contents in the soil of Site A could be detected. However, the nutrient contents of the leaves of the dominant plants collected from Site A and B were very close and no significant difference in terms of tree height and diameter and biomass was found between the two sites.

关键词：污水排放红树林湿地生态系统土壤植被

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深圳福田两种红树林植物叶片分解研究

应用生态学报 2001年第1期12卷 35-38页

作者：黄立南蓝崇钰束文圣中山大学广州510275

利用分解袋法研究两种红树林植物 (秋茄、桐花 )叶片在野外实地分解过程中的干物质和有机C、N、P变化情况 .结果表明 ,秋茄叶片野外分解的速度要比桐花叶片快得多 ,初始非灰分物质干重 (AFDW )损失一半所需的时间秋茄为 12d ,桐花 35d左... 详细信息

利用分解袋法研究两种红树林植物 (秋茄、桐花 )叶片在野外实地分解过程中的干物质和有机C、N、P变化情况 .结果表明 ,秋茄叶片野外分解的速度要比桐花叶片快得多 ,初始非灰分物质干重 (AFDW )损失一半所需的时间秋茄为 12d ,桐花 35d左右 .分解开始后 ,两种叶片的N含量均迅速上升 ,到达峰值后逐渐下降 ;而P含量则先略为下降 ,之后慢慢回升 ;叶片有机C含量则始终保持在相对较为稳定的水平上 .试验的结果还表明 ,桐花叶片在红树林系统内沿潮汐梯度的不同滩面位置上分解时。

关键词：红树林叶片分解水生植物

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柔性双频段频率选择表面膜的模块化设计

空间电子技术 2020年第2期17卷 109-113页

作者：束文生北京交通大学电子信息工程学院电磁兼容研究所北京100044

本文设计了一种柔性双频段极化无关的频率选择表面膜,应用在玻璃表面形成频率选择性玻璃,用来屏蔽常见的Wi-Fi等在公共且免费使用的微波频段的信号。所设计的结构工作频率分别为2.45GHz和5.5GHz。在工作频点处对电磁波的吸收能达到40dB... 详细信息

本文设计了一种柔性双频段极化无关的频率选择表面膜,应用在玻璃表面形成频率选择性玻璃,用来屏蔽常见的Wi-Fi等在公共且免费使用的微波频段的信号。所设计的结构工作频率分别为2.45GHz和5.5GHz。在工作频点处对电磁波的吸收能达到40dB。能够有效的阻止太空发电站的微波能量传输信号和室内Wi-Fi信号的相互干扰问题。另外,分析了结构的几何参数和入射角度对结构吸波特性的影响,在入射角达到度45°时,仍具有良好的屏蔽效果,说明这种柔性膜可以应用在非平面的场合下。并用等效电路模型对结构进行分析,详细的介绍了等效电路元件参数的计算过程,之后用电子辅助设计软件进行电路仿真,电路仿真的结果和全波电磁仿真软件仿真结果一致。所设计的结构改善了之前频率选择表面一体化设计,透光率差和制造成本高的问题。透光率达到91%。此外所设计的结构是一种具有柔性的模块化薄膜结构,现实中安装实现起来更加的方便。

关键词：极化无关频率选择表面双频段薄膜

Disruption of the Arabidopsis Defense Regulator Genes SAG101, EDS1, and PAD4 Confers Enhanced Freezing Tolerance

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Molecular Plant 2015年第10期8卷 1536-1549页

作者： Qin-Fang Chen Le Xu Wei-Juan Tan Liang Chen Hua Qi Li-Juan Xie Mo-Xian Chen Bin-Yi Liu Lu-Jun Yu Nan Yao Jian-Hua Zhang wensheng shu Shi Xiao State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Resources Collaborative Innovation Center of Genetics and DevelopmentSchool of Life Sciences Sun Yat-sen University Guangzhou 510275 China State Key Laboratory of Agrobioteehnology School of Life Sciences The Chinese University of Hong Kong Hong Kong China These authors contributed equally to this article

In Arabidopsis, three lipase-like regulators, SAG101, EDS1, and PAD4, act downstream of resistance protein-associated defense signaling. Although the roles of SAG101, EDS1, and PAD4 in biotic stress have been extensively studied, little is known about their functions in plant responses to abiotic stresses. Here, we show that SAG101, EDS1, and PAD4 are involved in the regulation of freezing tolerance in Arabidopsis. With or without cold acclimation, the sag101, edsl, and pad4 single mutants, as well as their double mutants, exhibited similarly enhanced tolerance to freezing temperatures. Upon cold exposure, the sag101, edsl, and pad4 mutants showed increased transcript levels of C-REPEAT/DRE BINDING FACTORs and their regulons compared with the wild type. Moreover, freezing-induced cell death and accumulation of hydrogen peroxide were ameliorated in sag101, edsl, and pad4 mutants. The sag101, edsl, and pad4 mutants had much lower salicylic acid （SA） and diacylglycerol （DAG） contents than the wild type, and exogenous application of SA and DAG compromised the freezing tolerance of the mutants. Furthermore, SA suppressed the cold-induced expression of DGATs and DGKs in the wild-type leaves. These findings indicate that SAG101, EDS1, and PAD4 are involved in the freezing response in Arabidopsis, at least in part, by modulating the homeostasis of SA and DAG.

关键词： cold acclimation diacylglycerol freezing tolerance reactive oxygen species salicylic acid