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Non-target effects of bioinoculants on rhizospheric microbial communities of Cajanus cajan

Gupta, R. and Mathimaran, N. and Wiemken, A. and Boller, T. and Bisaria, V. S. and Sharma, S.. (2014) Non-target effects of bioinoculants on rhizospheric microbial communities of Cajanus cajan. Applied soil ecology, Vol. 76. pp. 26-33.

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Official URL: http://edoc.unibas.ch/dok/A6289113

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Abstract

"Bioinoculants" have become a useful, environment-friendly tool in agriculture to increase crop yield. Previous work has shown that Cajanus cajan, India's most important pulse, can profit considerably from applications of the three bioinoculants, viz. Bacillus megaterium MTCC 453, Pseudomonas fluorescens LPK2 and Trichoderma harzianum MTCC 801. For careful "risk assessment", it is of interest to investigate the effect of application of such bioinoculants not only on the target crop, but also on the indigenous rhizospheric microbial community of that particular plant. To do so C cajan treated with bioinoculants, individually as well as in combinations, was grown in pots under field conditions. Fingerprinting, using automated ribosomal spacer analysis showed distinct, highly diverse bacterial and fungal rhizospheric communities, which were differently influenced by the applied bioinoculants. Two important groups of soil microbes, actinomycetes and beta-proteobacteria, were quantified using qPCR and shown to be little affected by the bioinoculants. Additionally, rhizosphere populations of groups to which the inoculants belonged were enumerated on selective media. An increase in abundance of phosphate solubilizing Bacillus sp. (73%), Pseudomonas sp. (42%), and fungi (53%) was observed with triple inoculation at maturity, as compared to control plants. Thus, there was no negative impact of the bioinoculants used in the study on specific groups of indigenous microbial community. (C) 2013 Elsevier B.V. All rights reserved.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Botanik > Pflanzenphysiologie Pathogenabwehr (Boller)
05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Pflanzenphysiologie Zuckermetabolismus (Wiemken)
UniBasel Contributors:Boller, Thomas and Wiemken, Andres M. and Natarajan, Mathimaran
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0929-1393
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 Oct 2014 09:19
Deposited On:10 Oct 2014 09:19

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