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Perturbation of maize rhizosphere microflora following seed bacterization with Burkholderia cepacia MCI 7

TitlePerturbation of maize rhizosphere microflora following seed bacterization with Burkholderia cepacia MCI 7
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication1997
AuthorsNacamulli, C., Bevivino Annamaria, Dalmastri Claudia, Tabacchioni Silvia, and Chiarini L.
JournalFEMS Microbiology Ecology
Pagination183 - 193
Date Published1997///
KeywordsBurkholderia cepacia, Microbial community, Microflora perturbation, Root colonization

Introduction of a large quantity of exogenous microorganisms may disrupt a local ecosystem and affect the natural microflora. In this work we investigated the effects of the introduction of a plant growth promoting strain of Burkholderia cepacia into the rhizosphere of maize on both indigenous B. cepacia populations and microbial community structure of total culturable bacteria using the concept of r/K strategy. Moreover we studied the distribution of bacterial populations in the root system at various soil depths. Seed bacterization was used as application method. Root colonization of the introduced strain occurred mainly on roots close to the plant stem, whereas indigenous B. cepacia was recovered at higher amounts from the lower parts of root systems of mature plants. As far as total culturable bacteria are concerned, an almost uniform distribution in the root system of mature plants was observed. The release of the exogenous bacterial strain affected mainly the microbial populations of young growing plants rather than mature plants. Indeed it caused only short-term perturbations in the microbial community of maize rhizosphere. Colonization of maize roots by indigenous B. cepacia was not significantly affected by the presence of the exogenous strain.


Cited By (since 1996): 38Export Date: 26 August 2010Source: Scopus

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