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Title: Bacterial communities associated with Brassica napusL. grown on trace element-contaminated and non-contaminated fields: a genotypic and phenotypic comparison
Authors: Croes, Sarah
Weyens, Nele
Janssen, Jolien
Vercampt, Hanne
Colpaert, Jan V.
Carleer, Robert
Vangronsveld, Jaco
Issue Date: 2013
Citation: MICROBIAL BIOTECHNOLOGY, 6 (4), p. 371-384
Abstract: Cultivable bacterial strains associated with field-grown Brassica napusL. (soil, rhizosphere and roots) from a trace elements (Cd, Zn and Pb) contaminated field and a non-contaminated control field were characterized genotypically and phenotypically. Correspondence analysis of the genotypic data revealed a correlation between soil and rhizosphere communities isolated from the same field, indicating that local conditions play a more important role in influencing the composition of (rhizosphere) soil bacterial communities than root exudates. In contrast, endophytic communities of roots showed a correlation between fields, suggesting that plants on the two fields contain similar obligate endophytes derived from a common seed endophytic community and/or can select bacteria from the rhizosphere. The latter seemed not very likely since, despite the presence of several potential endophytic taxa in the rhizosphere, no significant correlation was found between root and rhizosphere communities. The majority of Cd/Zn tolerant strains capable of phosphorus solubilization, nitrogen fixation, indole-3-acetic acid production and showing 1-aminocyclopropane-1-carboxylate deaminase capacity were found in the rhizosphere and roots of plants growing on the contaminated field.
Notes: Vangronsveld, J (reprint author), Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium. jaco.vangronsveld@uhasselt.be
URI: http://hdl.handle.net/1942/15393
DOI: 10.1111/1751-7915.12057
ISI #: 000320187000007
ISSN: 1751-7907
Category: A1
Type: Journal Contribution
Validation: ecoom, 2014
Appears in Collections: Research publications

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