An Endophytic Actinomycete, Streptomyces sp. AOK-30, Isolated from Mountain Laurel and Its Antifungal Activity |
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| Authors: | Tomio NISHIMURA Akane MEGURO Sachiko HASEGAWA Yoshiko NAKAGAWA Masafumi SHIMIZU Hitoshi KUNOH |
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| Institution: | (1) Akatsuka Orchid Co., Ltd., Takanoo, Tsu 514–2221, Japan, JP;(2) Laboratory of Ecological Circulation, Faculty of Bioresources, Mie University, Tsu 514–8507, Japan, JP |
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| Abstract: | 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.
Received 10 September 2002/ Accepted in revised form 22 November 2002 |
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| Keywords: | : endophytic actinomycetes antimicrobial activity Streptomyces sp biocontrol agent mountain laurel |
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