Antagonistic actinomycetes from Moroccan soil to control the grapevine gray mold

One hundred and forty-two different actinomycete strains were isolated from rhizosphere soil of Vitis vinifera L. sampled from four Moroccan areas. To evaluate the antifungal effect of the different collected actinomycete isolates, five fungi known to be phytopathogens ( Pythium ultimum , Fusarium o...

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Bibliographic Details
Published in:World journal of microbiology & biotechnology 2009, Vol.25 (1), p.81-91
Main Authors: Loqman, Souad, Barka, Essaid Ait, Clément, Christophe, Ouhdouch, Yedir
Format: Article
Language:English
Subjects:
Applied Microbiology
Biochemistry
Biological and medical sciences
Biological control
Biomedical and Life Sciences
Biotechnology
Botrytis cinerea
Environmental Engineering/Biotechnology
Fruits
Fundamental and applied biological sciences. Psychology
Fusarium
Life Sciences
Microbiology
Micromonospora
Mold
Original Paper
Pythium ultimum
Rhizosphere
Sclerotium rolfsii
Streptomyces
Verticillium dahliae
Vitaceae
Vitis vinifera
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Summary:One hundred and forty-two different actinomycete strains were isolated from rhizosphere soil of Vitis vinifera L. sampled from four Moroccan areas. To evaluate the antifungal effect of the different collected actinomycete isolates, five fungi known to be phytopathogens ( Pythium ultimum , Fusarium oxyysporum f. sp. albedinis , Sclerotium rolfsii, Verticillium dahliae and Botrytis cinerea ) were used. Results showed that 24 isolates had an in vitro inhibitory effect toward at least 4 of the indicator fungi, but only 9 inhibited all these phytopathogens. These nine isolates were subsequently evaluated individually using in vitro grapevine plantlets for their ability to protect against plant gray mold. We demonstrate here that pre-inoculation of plantlets with these isolates allow them to withstand Botrytis cinerea. Six of these strains were shown to belong to the genus Streptomyces and three to the genus Micromonospora . These findings indicate the potential of developing effective actinomycetes from Moroccan habitats for the biological control of Botrytis cinerea.
ISSN:0959-3993
1573-0972
DOI:10.1007/s11274-008-9864-6