Sorry, you need to enable JavaScript to visit this website.

Effect of Fusarium verticillioides on maize-root-associated Burkholderia cenocepacia populations

TitleEffect of Fusarium verticillioides on maize-root-associated Burkholderia cenocepacia populations
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2005
AuthorsBevivino, Annamaria, Peggion V., Chiarini L., Tabacchioni Silvia, Cantale Cristina, and Dalmastri Claudia
JournalResearch in Microbiology
Volume156
Pagination974 - 983
Date Published2005///
KeywordsAntifungal activity, Burkholderia cenocepacia, Fusarium verticillioides, Genetic diversity, Maize root colonization
Abstract

Burkholderia cepacia complex (Bcc) bacteria are naturally present in the rhizosphere of several crop plants and have been found to antagonize a wide range of important plant pathogens. In this study, we evaluated the effect of the pathogenic fungus Fusarium verticillioides on Bcc populations recovered from the roots of Zea mays plants. Maize plants were cultivated under greenhouse conditions and bacterial colonies were randomly isolated from distinct root portions of Fusarium-treated and control plants. We obtained a total of 120 Bcc isolates which all belonged to the species Burkholderia cenocepacia, a species of the Bcc widely distributed in natural habitats such as the rhizosphere of several crop plants. Results obtained revealed that the presence of the plant pathogen F. verticillioides had an effect at the root colonization level of B. cenocepacia populations, since an increase in indigenous B. cenocepacia bacteria was found in the rhizospheres of maize plants grown in infested soil, compared to the rhizospheres of control plants. The analysis of diversity indices as well as the investigation of genetic polymorphism of B. cenocepacia strains, isolated from Fusarium-treated and control root portions, revealed greater genetic variability in the presence of F. verticillioides, especially in the terminal root system portion. Finally, all B. cenocepacia isolates were also tested for in vitro inhibition of F. verticillioides growth as a functional property. Our results revealed that all B. cenocepacia isolates were able to restrict in vitro fungal growth, suggesting that there was no relationship between genetic polymorphism and biocontrol traits. © 2005 Elsevier SAS. All rights reserved.

Notes

Cited By (since 1996): 7Export Date: 25 August 2010Source: Scopus

URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-28444454925&partnerID=40&md5=6362c1036ee349c9b352de8f36e76cc4
Citation Key274