检索结果-南通市图书馆

Chromium phytoextraction and physiological responses of the hyperaccumulator Leersia hexandra Swartz to plant growth-promoting rhizobacterium inoculation

引用

Frontiers of Environmental Science & Engineering 2023年第1期17卷 99-110页

作者： Xuehong Zhang Yuanyuan Zhang Dan Zhu Zhiyi Lin Na Sun Chang Su Hua Lin Junjian Zheng College of Life and Environmental Science Guilin University of Electronic TechnologyGuilin 541004China College of Environmental Science and Engineering Guilin University of TechnologyGuilin 541004China College of Mathematics and Science Wuhan Institute of TechnologyWuhan 430205China

Phytoextraction is a promising option for purifying hexavalent chromium(Cr(Ⅵ))-laden wastewater,but the long remediation period incurred by poor growth rate of Cr hyperaccumulators remains a primary hindrance to its large-scale application.In this study,we performed a hydroponic experiment to evaluate the feasibility of promoting the growth and phytoextraction efficiency of Cr hyperaccumulator Leersia hexandra Swartz(L.hexandra)by inoculating plant growth-promoting rhizobacteria(PGPR)Bacillus cereus(B.cereus).In batch tests,the Cr(Ⅵ)removal rates of L.hexandra and B.cereus co-culture were greater than the sum of their respective monocultures.This was likely due to the microbial reduction of Cr(Ⅵ)to Cr(Ⅲ),which is amiable to plant uptake.Besides,the PGPR factors of B.cereus,including indoleacetic acid(IAA)production,1-aminocyclopropane-1-carboxylic acid deamination(ACCd)activity,phosphate solubilization capacity,and siderophore production,were quantified.These PGPR factors helped explain the biomass augmentation,root elongation and enhanced Cr enrichment of the inoculated L.hexandra in pot experiments.Despite the increased Cr uptake,no aggravated oxidative damage to the cell membrane was observed in the inoculated L.hexandra.This was attributed to its capacity to confront the increased intracellular Cr stress by upregulating both the activities of antioxidative enzymes and expression of metal-binding proteins/peptides.Moreover,L.hexandra could always conserve the majority of Cr in the residual and oxalic integrated forms with low mobility and phytotoxicity,irrespective of the B.cereus inoculation.These results highlight the constructed Cr hyperaccumulatorrhizobacteria consortia as an effective candidate for decontaminating Cr(Ⅵ)-laden wastewater.

关键词： Hexavalent chromium hyperaccumulator Rhizobacteria Leersia hexandra Swartz Bacillus cereus Consortia

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Extraction and isolation of the salidroside-type metabolite from zinc(Zn) and cadmium(Cd) hyperaccumulator Sedum alfredii Hance

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第10期13卷 839-845页

作者： Yan XING Hong-yun PENG Xia LI Meng-xi ZHANG Ling-ling GAO Xiao-e YANG Ministry of Education Key Laboratory of Environmental Remedia-tion and Ecological Health College of Environmental and ResourceSciencesZhejiang UniversityHangzhou 310058China State Key Laboratory of Hydrology-Water Resources and HydraulicEngineering Hohai UniversityNanjing 210098China

The active metabolite in the post-harvested biomass of zinc(Zn) and cadmium(Cd) hyperaccumulator Sedum alfredii Hance from phytoextraction is of great interest in China.The current study demonstrates that a salidroside-type metabolite can be yielded from the Zn/Cd hyperaccumulator S.alfredii biomass by means of sonication/ethanol extraction and macroporous resin column(AB-8 type) isolation.The concentrations of Zn and Cd in the salidroside-type metabolite were below the limitation of the national standards.

关键词： Salidroside-type metabolite Isolation hyperaccumulator Sedum alfredii Hance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of phosphorus on arsenic accumulation in As-hyperaccumulator Pteris vittata L. and its implication

引用

Chinese Science Bulletin 2002年第22期47卷 1876-1879页

作者： Tongbin Chen Zhilian Fan Mei Lei Zechun Huang Chaoyang Wei Chinese Acad Sci Inst Geog Sci & Nat Resources Res Lab Environm Remediat Beijing 100101 Peoples R China

Pot experiment was conducted to understand the effect of phosphorus on arsenic accumulation in As-hyperaccumulator Chinese brake (Pteris vittata L.). It is shown that arsenic concentrations in the fronds and rhizoids, the arsenic bioaccumulation factor, and the total arsenic in the fronds were not influenced significantly under low levels of phosphorus (≤400 mg/kg) and increased sharply under high levels of phosphorus (>400 mg/ kg). The discovery implies that the efficiency of arsenic removal in phytoremedia-tion using the hyperaccumulating plant can be greatly elevated by the phosphorus addition at high rates. The interaction between the accumulation of phosphorus and that of arsenic in plant was stimulated mutually. The result represents that Chinese brake is a good material for plant physiologist to conduct comparative and mechanism studies on the uptake behaviors of phosphorus and arsenic, and phosphorus is also a potential accelerator for phytoremediation of arsenic-contaminated soils.

关键词： Chinese brake (Pteris vittata L.) hyperaccumulator arsenic phosphorus accumulation.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Potential of Pteris vittata L. for phytoremediation of sites co-contaminated with cadmium and arsenic: The tolerance and accumulation

引用

Journal of Environmental Sciences 2008年第1期20卷 62-67页

作者： XIAO Xiyuan CHEN Tongbin AN Zhizhuang LEI Mei HUANG Zechun LIAO Xiaoyong LIU Yingru Center for Environmental Remediation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China.

Field investigation and greenhouse experiments were conducted to study the tolerance of Pteris vittata L. （Chinese brake） to cadmium （Cd） and its feasibility for remediating sites co-contaminated with Cd and arsenic （As）. The results showed that P. vittata could survive in pot soils spiked with 80 mg/kg of Cd and tolerated as great as 301 mg/kg of total Cd and 26.8 mg/kg of diethyltriaminepenta acetic acid （DTPA）-extractable Cd under field conditions. The highest concentration of Cd in fronds was 186 mg/kg under a total soil concentration of 920 mg As/kg and 98.6 mg Cd/kg in the field, whereas just 2.6 mg/kg under greenhouse conditions. Ecotypes of P. vittata were differentiated in tolerance and accumulation of Cd, and some of them could not only tolerate high concentrations of soil Cd, but also accumulated high concentrations of Cd in their fronds. Arsenic uptake and transportation by P. vittata was not inhibited at lower levels （〈20 mg/kg） of Cd addition. Compared to the treatment without addition of Cd, the frond As concentration was increased by 103.8% at 20 mg Cd/kg, with the highest level of 6434 mg/kg. The results suggested that the Cd-tolerant ecotype of P. vittata extracted effectively As and Cd from the site co-contaminated with Cd and As, and might be used to remediate and revegetate this type of site.

关键词： arsenic （As） cadmium （Cd） Chinese brake （Pteris vittata L.） hyperaccumulator phytoremediation tolerance uptake

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An investigation of cellular distribution of manganese in hyperaccumlator plant Phytolacca acinosa Roxb. using SRXRF analysis

引用

Journal of Environmental Sciences 2006年第4期18卷 746-751页

作者： XU Xiang-hua SHI Ji-yan CHEN Ying-xu XUE Sheng-guo WU Bei HUANG Yu-ying Department of Environmental Engineering Zhejiang University Hangzhou 310029 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 China

Phytolacca acinosa Roxb. （P acinosa） is a recently discovered manganese hyperaccumulator plant from southern China. It is a good candidate for phytoremediation of manganese（Mn） polluted soil for its high biomass and fast growth. Knowledge of the tissue localization and identification of heavy metals can provide essential information on metal toxicity and bioaccumulation mechanisms. Synchrotron radiation X-ray fluorescence spectroscopy （SRXRF） microprobe was used in this study to investigate the cellular distributions of Mn and other elements in root, stem, leaf, petiole and midrib of P. acinosa. The highest Mn content was found in the vascular tissues of root, stem, petiole and midrib. Cortex in root played a key role in Mn absorption and Mn was limited in the vascular bundle during the process of transportation in stem. Moreover, Mn content in leaf epidermis was higher than that in mesophyll, which suggested that the sequestration of Mn in leaf epidermis might be one of the detoxification mechanisms of P. acinosa. The significance of other elemental （such as P, S, K, Ca, Fe, Zn and Cu） distribution patterns and the correlation with Mn were also discussed.

关键词： hyperaccumulator Phytolacca acinosa Roxb. manganese element distribution SRXRF

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chromosome doubling of Sedum alfredii Hance: A novel approach for improving phytoremediation efficiency

引用

Journal of Environmental Sciences 2019年第12期31卷 87-96页

作者： Ying Feng Qiong Wang Qian Meng Yongjun Liu Fengshan Pan Sha Luo Yingjie Wu Luyao Ma Xiaoe Yang MOE Key Laboratory of Environment Remediation and Ecological Health College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China Hunan Tobacco Scientific Research Institute China National Tobacco Corp CompanyChangsha 410004China Hailiang Group Co. Ltd.Hangzhou 310058China

Sedum alfredii Hance is a cadmium(Cd)/zinc(Zn)hyperaccumulator native to China.However,its relatively low biomass restricted the large-scale application for heavy metal contamination remediation.The chromosome set doubling of S.alfredii in vitro was achieved by 0.1%–0.2%(W/V)colchicine treatment.The plant DNA ploidy was analyzed by flow cytometry and chromosome set doubling plants(CSD)were identified based on the obvious different sharp peak.A tissue culture experiment with different Cd treated levels and a field trial with natural polluted mined soil were conducted to study the effects of chromosome doubling on plant biomass and Cd accumulation in shoots.The results suggested that S.alfredii is a mixoploid.Compared with the wild type plants(WT),CSD exhibited typical"gigas"characteristics in morphology including stem thickness,root hair production,number of leaves and size of stoma guard cell.Fresh weight and dry weight of CSD were increased to 1.62–2.03-fold and 2.26–3.25-fold of WT.And Cd content of CSD showed a17.49%–42.82%increase and 59%increase under tissue culture and field condition,accordingly.In addition,the TF and in BCF of CSD were 2.37-and 1.59-fold of WT,respectively.These results proved that it is feasible to promote phytoextraction efficiency of S.alfredii in Cd contaminated soils through chromosomal engineering,which provides a novel approach for hyperaccumulator application in phytoremediation.

关键词： Colchicine hyperaccumulator Cd Sedum alfredii Hance Phytoremediation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preliminary study on the electrocatalytic performance of an iron biochar catalyst prepared from iron-enriched plants

引用

Journal of Environmental Sciences 2020年第2期32卷 81-89页

作者： Xinqiang Cao Yingping Huang Changcun Tang Jianzhu Wang David Jonson Yanfen Fang College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang 443002China China Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China College of Hydraulic and Environmental Engineering China Three Gorges UniversityYichang 443002China

Eichhornia crassipes is a hyperaccumulator of metals and has been widely used to remove metal pollutants from water, but disposal of contaminated plants is problematic.Biochar prepared from plants is commonly used to remediate soils and sequester carbon.Here, the catalytic activity of biochar prepared from plants enriched with iron was investigated as a potentially beneficial use of metal-contaminated plants.In a 30-day hydroponic experiment, E.crassipes was exposed to different concentrations of Fe(Ⅲ)(0, 4, 8, 16, 32 and 64 mg/L), and Fe-biochar(Fe-BC) was prepared by pyrolysis of the plant roots.The biochar was characterized using X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive X-ray spectrometry(EDS), Brunauer–Emmett–Teller(BET) analysis, X-ray photoelectron spectroscopy(XPS) and atomic absorption spectrometry(AAS).The original root morphology was visible and iron was present as γ-Fe2O3 and Fe3O4.The biochar enriched with Fe(Ⅲ) at 8 mg/L(8-Fe-BC) had the smallest specific surface area(SSA, 13.54 m^2/g) and the highest Fe content(27.9 mg/g).Fe-BC catalytic activity was tested in the electrocatalytic reduction of H2O2 using cyclic voltammetry(CV).The largest reduction current(1.82 mA/cm^2) was displayed by 8-Fe-BC, indicating the highest potential catalytic activity.We report here, for the first time, on the catalytic activity of biochar made from iron-enriched plants and demonstrate the potential for reusing metalcontaminated plants to produce a biochar catalyst.

关键词： hyperaccumulator Eichhornia crassipes Fe-doped biochar H2O2 electrocatalysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preliminary study on Cd accumulation characteristics in Sansevieria trifasciata Prain

引用

Plant Diversity 2020年第5期42卷 351-355页

作者： Xiong Li Yongping Yang Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunming650201China

Phytoremediation techniques to clean heavy metal pollution soil depend on identifying plant species that can act as phytoremediators.One important approach to screening potential phytoremediators is to evaluate characteristics of heavy metal accumulation.In this study,we performed firsthand analysis of Cd tolerance and accumulation characteristics of three Sansevieria trifasciata cultivars by pot experiment.Plant growth results showed that all three S.trifasciata cultivars can tolerate 50 mg kg^-1 soil Cd concentration.After growth under 50 mg kg^-1 soil Cd concentration for 4 months,the Cd bioconcentration factors in the shoots of S.‘Trifasciata’,S.trifasciata‘Laurentii’,and S.trifasciata‘Silver Hahnii’were 1.26,1.30,and 1.19,while those in the roots were 12.53,11.43,and 5.45,respectively.This result reveals the considerably low translocation factors of 0.10,0.12,and 0.22 for S.‘Trifasciata’,S.trifasciata‘Laurentii’,and S.trifasciata‘Silver Hahnii’,respectively.These results suggest that all three S.trifasciata cultivars had high Cd absorption capacities but low Cd translocation capacities.In combination with total Cd accumulation distribution and plant growth characteristics,S.trifasciata can be designed as a phytostabilizer in Cd-contaminated soils in its cultivation regions.Meanwhile,the mechanism of high Cd tolerance and accumulation characteristics in the roots of S.trifasciata should be explored.This study provides new resources for dealing with Cd-contaminated soils and exploring Cd tolerance and accumulation mechanisms in plants.

关键词： Sansevieria trifasciata Cadmium Phytoextraction Phytostabilization hyperaccumulator

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research Trends in Rare Earth Element hyperaccumulator

引用

Journal of Rare Earths 2006年第1期24卷 19-19页

作者： Wei Zhenggui Zhang Huijuan Li Huixin Hu Feng College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 China

A brief introduce to environmental and ecological characteristics, hyperaccumulators of rare earth elements （REEs）, as well as the scientific significance of REE hyperaccumulators were presented. Based on this introduce, the achievements in REE hyperaccumulator research, which were ：（ 1 ） The species and regional distribution of REE hyperaccumulators,

关键词： hyperaccumulator physiological and biochemical mechanisms phytoremidiation rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two Na^＋ and Cl^- hyperaccumulators of the Chenopodiaceae

引用

Journal of Integrative Plant Biology 2005年第3期47卷 311-318页

作者： Ke-FuZHAO HaiFAN JieSONG Ming-XiaSUN Bao-ZengWANG Sheng-QiangZHANG I.A.UNGAR InstituteofPlantStress ShandongNormalUniversityJinan250014China DepartmentofEnvironmentandPlantEcology OhioUniversityAthensOhio45701USA

Abstract: The authors found five sodium (Na+) and chloride (Cl-.) hyperaccumulating halophytes in the Temperate Desert of Xinjiang, China and studied two of them (Suaeda salsa (L.) Pall. and Kalidium folium (Pall.) Moq.). K. folium and S. salsa had a NaCl content of 32.1% and 29.8%, respectively, on a dry weight basis. X-ray microanalysis of the Na+ in the vacuole, apoplasts and cytoplasm of the two plants indicated a ratio of 7.3:5.6:1.0 in K. folium and 7.3:6.6:1.0 in S. salsa. These data show that K. folium and S. salsa both have a high Na+ and Cl- accumulating capacity, which is related to high activity of tonoplast H+-ATPase and H+-PPase.

关键词： apoplast Cl- cytoplasm hyperaccumulator Kalidium folium (Pall.) Moq Na+ Suaeda salsa (L.) Pall vacuole

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：