An endophytic actinomycete, Streptomyces sp. AOK-30, isolated from mountain laurel and its antifungal activity

To survey endophytic actinomycetes as potential biocontrol agents against fungal diseases of mountain laurel, young plants of mountain laurel (Kalmia latifolia L.) were used as an isolation source. From a total of 73 actinomycetes isolates obtained from leaves, stems and roots of test plants, Strept...

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Bibliographic Details
Published in:Journal of general plant pathology : JGPP 2002-12, Vol.68 (4), p.390-397
Main Authors: Nishimura, T. (Akatsuka Orchid Co. Ltd., Tsu (Japan)), Meguro, A, Hasegawa, S, Nakagawa, Y, Shimizu, M, Kunoh, H
Format: Article
Language:English
Subjects:
ACTINOMYCETALES
ANTIMICROBIAL PROPERTIES
Biological control
BIOLOGICAL CONTROL AGENTS
Defoliation
ENDOPHYTES
Fungi
IDENTIFICATION
KALMIA
Pathogens
Plant pathology
Plant populations
Seedlings
STREPTOMYCES
Yeasts
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Summary:To survey endophytic actinomycetes as potential biocontrol agents against fungal diseases of mountain laurel, young plants of mountain laurel (Kalmia latifolia L.) were used as an isolation source. From a total of 73 actinomycetes isolates obtained from leaves, stems and roots of test plants, Streptomyces sp. AOK-30 was selected, because i) it had a broad and intense antimicrobial spectrum against various yeasts and fungal pathogens of Ericaceae, ii) it grew on the multiplication and rooting media for tissue culture for this plant, and iii) the tissue-cultured seedlings that had been treated with this isolate became resistant to Pestalotia disease without any adverse growth effects such as malformation, dwarfing, discolorization and defoliation. This isolate was identified as Streptomyces sp., based on cultural, physiological and morphological characteristics. The present results indicate that isolate AOK-30 is a potential biocontrol agent against diseases of mountain laurel. [PUBLICATION ABSTRACT]
ISSN:1345-2630
1610-739X
DOI:10.1007/pl00013109