The characteristics of rhizosphere microbes associated with plants in arsenic-contaminated soils from cattle dip sites

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Show simple item record Chopra, B. en_US Bhat, S. en_US Mikheenko, I. en_US Xu, Z. en_US Yang, Y. en_US Luo, X. en_US Chen, H. en_US Van Zwieten, L. en_US Lilley, Ross en_US Zhang, R. en_US
dc.contributor.editor en_US 2012-02-02T06:35:51Z 2012-02-02T06:35:51Z 2007 en_US
dc.identifier 2010003212 en_US
dc.identifier.citation Chopra B. et al. 2007, 'The characteristics of rhizosphere microbes associated with plants in arsenic-contaminated soils from cattle dip sites', Elsevier B.V., vol. 378, no. 3, pp. 331-342. en_US
dc.identifier.issn 0048-9697 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Soil microorganisms and plants were studied in samples of arsenic-contaminated soil from two cattle dip sites. The aim was to delineate the parameters that will determine the feasibility of future remediation by growing arsenic-accumulating plants, including the identity and characteristics of some rhizosphere soil microbes. The soil samples contained high total, but low soluble arsenic concentrations which, together with other properties, resembled the previously reported characteristics of dip-site soils from this region of rural Australia. A glasshouse trial demonstrated that dip-site rhizosphere microbes promoted arsenic accumulation by the grass Agrostis tenuis on contaminated dip-site soil without inhibition of growth. The arsenic content of the shoots was increased by 45%. We studied the colonization of roots of dip-site plants by mycorrhizal fungi and tentatively identified six genera of other fungi present in the soil samples. Two plant species growing at the sites, Kikuyu grass (the most abundant plant) and Rainbow fern, exhibited mixed infections of their roots by endomycorrhizal fungi (tentatively identified as Acaulospora and Gigaspora) and by soilborn pathogens. Five rhizosphere bacteria were identified to genus level and we determined the effect of arsenic on their growth. The two most prevalent strains differed greatly in their growth sensitivity to arsenate; Arthrobacter sp. being the most sensitive while Ochrobactrum sp. exhibited exceptional resistance to arsenate. Of the other, less prevalent strains, two were Bacillus spp. and the last, Serratia sp., was the most resistant to arsenite. These findings show the importance of understanding plant?soil microbe interactions for developing future strategies aimed at a phytoremediation-based approach to removing arsenic from soil at dip sites. en_US
dc.language en_US
dc.publisher Elsevier B.V. en_US
dc.relation.isbasedon en_US
dc.title The characteristics of rhizosphere microbes associated with plants in arsenic-contaminated soils from cattle dip sites en_US
dc.parent The Science of the Total Environment en_US
dc.journal.volume 378 en_US
dc.journal.number 3 en_US
dc.publocation Netherlands en_US
dc.identifier.startpage 331 en_US
dc.identifier.endpage 342 en_US SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 050300 en_US
dc.personcode 0000068168 en_US
dc.personcode 0000068169 en_US
dc.personcode 0000068170 en_US
dc.personcode 0000068171 en_US
dc.personcode 0000068172 en_US
dc.personcode 0000068173 en_US
dc.personcode 0000063536 en_US
dc.personcode 0000068174 en_US
dc.personcode 995493 en_US
dc.personcode 0000068176 en_US
dc.percentage 100 en_US Soil Sciences en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Arsenic; Soil contamination; Cattle dip site; Rhizosphere; Bacteria; Mycorrhizae en_US
dc.staffid en_US

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