Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1037823
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dc.contributor.authorCASTELIANI, A. G. B.pt_BR
dc.contributor.authorKAVAMURA, V. N.pt_BR
dc.contributor.authorMORAIS, J. F. A.pt_BR
dc.contributor.authorSILVA, J. L. dapt_BR
dc.contributor.authorPANSA, C. C.pt_BR
dc.contributor.authorMELO, I. S. dept_BR
dc.date.accessioned2016-02-19T11:11:11Zpt_BR
dc.date.available2016-02-19T11:11:11Zpt_BR
dc.date.created2016-02-19pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationIn: CONGRESSO BRASILEIRO DE MICROBIOLOGIA, 28., Florianópolis. Anais... Florianópolis: Sociedade Brasileira de Microbiologia, 2015. Ref. 1655-1.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1037823pt_BR
dc.descriptionAbstract: Naturally occurring epiphytic microorganisms display different colonization strategies. Studies report their potential in acting as biocontrol agents through several mechanisms such as competition for space and nutrients, production of antibiotics, resistance induction, parasitism, among others. However, little is known about the mechanisms that could possibly act in the control of the pathogenic fungus Magnaporthe grisea, responsible for wheat blast. Thus, the present work aimed the selection of epiphytic bacteria with the potential to act as biological control agents against M. grisea through different mechanisms of action. Bacterial isolates were subjected to direct antagonism tests. The growth rate in oligotrophic conditions (1% sucrose and 1% glucose) after 14 and 36 hours, biofilm production on 1% glucose and 1% sucrose and production of indole-3-acetic acid (IAA) were also tested. Thirty bacterial strains were isolated from wheat leaves (variety IAC 385) obtained from a field in Palmital, São Paulo state, Brazil. Any isolate showed direct antagonistic activity, indicating that no inhibition occurs through antibiosis. After 14 hours of growth, two strains (2EPPE3 and 1LCR10) exhibited better growth rate in medium supplemented with 1% sucrose. Biofilm production was favoured in one strain (1LCR3). More than 50 ?g.mL-1 of IAA was detected in one strain (1L10) and the production of this hormone might be related to the induction of defence response in plants. Isolates displaying the best growth rate in oligotrophic conditions and production of different compounds may be used together targeting a better biological control response against the plant pathogen. However, further analyses are necessary for verification of such mechanisms of action.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectWheat blastpt_BR
dc.subjectEpiphytic bacteriapt_BR
dc.titleBioprospecting biofilm-forming epiphytic bacteria from wheat under oligotrophic conditions.pt_BR
dc.typeResumo em anais e proceedingspt_BR
dc.date.updated2016-04-15T11:11:11Zpt_BR
dc.subject.nalthesaurusBiological controlpt_BR
riaa.ainfo.id1037823pt_BR
riaa.ainfo.lastupdate2016-04-15pt_BR
dc.contributor.institutionA. G. B. CASTELIANI, ESALQ/USP; V. N. KAVAMURA, ESALQ/USP; J. F. A. MORAIS, UNIP; J. L. da SILVA; C. C. PANSA, ESALQ/USP; ITAMAR SOARES DE MELO, CNPMA.pt_BR
Aparece nas coleções:Resumo em anais de congresso (CNPMA)

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