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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
07/12/2015 |
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Data da última atualização: |
25/01/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MELO, I. S. de; VALENTE, A. M. M. P.; KAVAMURA, V. N.; VILELA, E. S. D.; FAULL, J. L. |
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Afiliação: |
ITAMAR SOARES DE MELO, CNPMA; ANGELA MARIA MONTES PERAL VALENTE; VANESSA NESSNER KAVAMURA, FAPESP; ELKE SIMONI DIAS VILELA, CNPMA; JANE LOUISE FAULL, University of London. |
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Título: |
Mycoparasitic nature of Bionectria sp. strain 6.21. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Journal of Plant Protection Research, Varsóvia, v. 54, n. 4, p. 327-333, 2014. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In this study, a Bionectria sp. strain isolated from citrus rhizosphere was evaluated for its potential in inhibiting the growth of Rhizoctonia solani and Pythium aphanidermatum. It was demonstrated that Bionectria sp. 6.21 inhibited the growth of P. aphanidermatum and R. solani. In dual cultures, however, the antagonist only parasitised R. solani. Regarding the assay involving P. aphanidermatum, a lack of mycoparasitic ability was demonstrated. Crude extract of Bionectria completely inhibited the mycelial growth of both fungi. It appears that the main mechanism involved in the antagonism of Pythium by Bionectria is through antibiotic production. The antagonistic fungus released extracellular secondary metabolites. The metabolites were found to be inhibitory to both plant pathogenic fungi. From the crude extract, eleven fractions were obtained and tested for their antifungal properties. Two of them showed very strong activity against P. aphanidermatum. The obtained results indicated that this biocontrol agent has both antibiotic and mycoparasitic properties. On the other hand, evidence obtained from Scanning Electron Microscopy (SEM) suggests the involvement of an enzymatic process, with enzymatic digestion playing a major role in the parasitism of Bionectria sp. 6.21. In conclusion, these results provide evidence that mainly due to mycoparasitism, this strain has the potential to become a good candidate for biological control. |
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Palavras-Chave: |
Antifungal activity; Atividade antifúngica; Bionectria sp; Mycoparasits; Plant diseases. |
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Thesagro: |
Controle biológico; Doença de planta; Fungo; Fungo para controle biológico; Pythium aphanidermatum; Rhizoctonia solani. |
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Thesaurus Nal: |
Antifungal properties; Biological control agents; enzymes; Fungi; Plant diseases and disorders. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/135039/1/2015AP07.pdf
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Marc: |
LEADER 02519naa a2200361 a 4500
001 2030877
005 2016-01-25
008 2014 bl uuuu u00u1 u #d
100 1 $aMELO, I. S. de
245 $aMycoparasitic nature of Bionectria sp. strain 6.21.$h[electronic resource]
260 $c2014
520 $aAbstract: In this study, a Bionectria sp. strain isolated from citrus rhizosphere was evaluated for its potential in inhibiting the growth of Rhizoctonia solani and Pythium aphanidermatum. It was demonstrated that Bionectria sp. 6.21 inhibited the growth of P. aphanidermatum and R. solani. In dual cultures, however, the antagonist only parasitised R. solani. Regarding the assay involving P. aphanidermatum, a lack of mycoparasitic ability was demonstrated. Crude extract of Bionectria completely inhibited the mycelial growth of both fungi. It appears that the main mechanism involved in the antagonism of Pythium by Bionectria is through antibiotic production. The antagonistic fungus released extracellular secondary metabolites. The metabolites were found to be inhibitory to both plant pathogenic fungi. From the crude extract, eleven fractions were obtained and tested for their antifungal properties. Two of them showed very strong activity against P. aphanidermatum. The obtained results indicated that this biocontrol agent has both antibiotic and mycoparasitic properties. On the other hand, evidence obtained from Scanning Electron Microscopy (SEM) suggests the involvement of an enzymatic process, with enzymatic digestion playing a major role in the parasitism of Bionectria sp. 6.21. In conclusion, these results provide evidence that mainly due to mycoparasitism, this strain has the potential to become a good candidate for biological control.
650 $aAntifungal properties
650 $aBiological control agents
650 $aenzymes
650 $aFungi
650 $aPlant diseases and disorders
650 $aControle biológico
650 $aDoença de planta
650 $aFungo
650 $aFungo para controle biológico
650 $aPythium aphanidermatum
650 $aRhizoctonia solani
653 $aAntifungal activity
653 $aAtividade antifúngica
653 $aBionectria sp
653 $aMycoparasits
653 $aPlant diseases
700 1 $aVALENTE, A. M. M. P.
700 1 $aKAVAMURA, V. N.
700 1 $aVILELA, E. S. D.
700 1 $aFAULL, J. L.
773 $tJournal of Plant Protection Research, Varsóvia$gv. 54, n. 4, p. 327-333, 2014.
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Embrapa Meio Ambiente (CNPMA) |
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