Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030877
Research center of Embrapa/Collection: Embrapa Meio Ambiente - Artigo em periódico indexado (ALICE)
Date Issued: 2014
Type of Material: Artigo em periódico indexado (ALICE)
Authors: MELO, I. S. de
VALENTE, A. M. M. P.
KAVAMURA, V. N.
VILELA, E. S. D.
FAULL, J. L.
Additional Information: 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.
Title: Mycoparasitic nature of Bionectria sp. strain 6.21.
Publisher: Journal of Plant Protection Research, Varsóvia, v. 54, n. 4, p. 327-333, 2014.
Language: en
Keywords: Atividade antifúngica
Antifungal activity
Bionectria sp
Plant diseases
Mycoparasits.
Description: 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.
Thesagro: Fungo
Fungo para controle biológico
Controle biológico
Rhizoctonia solani
Pythium aphanidermatum
Doença de planta
NAL Thesaurus: Fungi
Plant diseases and disorders
Biological control agents
Antifungal properties
enzymes.
Data Created: 2015-12-07
Appears in Collections:Artigo em periódico indexado (CNPMA)

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