Mycoparasitic nature of Bionectria sp. strain 6.21

• Autorzy: Soares de Melo I. , Montes Peral Valente A. M. , Kavamura V. N. , Dias Vilela E. S. , Faull J. L.
• Języki publikacji: EN

Abstrakty

EN

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.

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2014
• Tom: 54
• Numer: 4
• Opis fizyczny: p.327-333,fig.,ref.

Twórcy

autor

Soares de Melo I.

• Laboratory of Environmental Microbiology, Embrapa Environment, Jaguariuna, SP 13.820-000, Brazil

autor

Montes Peral Valente A. M.

• Laboratory of Environmental Microbiology, Embrapa Environment, Jaguariuna, SP 13.820-000, Brazil

autor

Kavamura V. N.

• Laboratory of Environmental Microbiology, Embrapa Environment, Jaguariuna, SP 13.820-000, Brazil

autor

Dias Vilela E. S.

• Laboratory of Environmental Microbiology, Embrapa Environment, Jaguariuna, SP 13.820-000, Brazil

autor

Faull J. L.

• Department of Biological Sciences, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, U.K.

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Identyfikatory

DOI

10.2478/jppr-2014-0049