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| Registros recuperados : 650 | |
| Registros recuperados : 650 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
19/02/2016 |
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Data da última atualização: |
15/04/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
CASTELIANI, A. G. B.; KAVAMURA, V. N.; MORAIS, J. F. A.; SILVA, J. L. da; PANSA, C. C.; MELO, I. S. de. |
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Afiliação: |
A. 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. |
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Título: |
Bioprospecting biofilm-forming epiphytic bacteria from wheat under oligotrophic conditions. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MICROBIOLOGIA, 28., Florianópolis. Anais... Florianópolis: Sociedade Brasileira de Microbiologia, 2015. Ref. 1655-1. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: 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. MenosAbstract: 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. Iso... Mostrar Tudo |
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Palavras-Chave: |
Epiphytic bacteria; Wheat blast. |
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Thesaurus NAL: |
Biological control. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/139525/1/2015RA-013.pdf
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Marc: |
LEADER 02516nam a2200205 a 4500
001 2037823
005 2016-04-15
008 2015 bl uuuu u00u1 u #d
100 1 $aCASTELIANI, A. G. B.
245 $aBioprospecting biofilm-forming epiphytic bacteria from wheat under oligotrophic conditions.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE MICROBIOLOGIA, 28., Florianópolis. Anais... Florianópolis: Sociedade Brasileira de Microbiologia, 2015. Ref. 1655-1.$c1655
520 $aAbstract: 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.
650 $aBiological control
653 $aEpiphytic bacteria
653 $aWheat blast
700 1 $aKAVAMURA, V. N.
700 1 $aMORAIS, J. F. A.
700 1 $aSILVA, J. L. da
700 1 $aPANSA, C. C.
700 1 $aMELO, I. S. de
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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