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Title 

Isolation and characterization of endophytic actinomycetes from chinese cabbage roots as antagonists to Plasmodiophora brassicae

Authors 

S O LeeG J ChoiY H ChoiK S JangDong Jin ParkChang-Jin KimJ C Kim

Publisher 

The Korean Society for Applied Microbiology

Issue Date 

2008

Citation 

Journal of Microbiology and Biotechnology, vol. 18, no. 11, pp. 1741-1746

Keywords 

clubrootendophytic actinomycetemicrobispora rosea subsp. roseaplasmodiophora brassicaestreptomyces olivochromogenesisolation and purificationplant rootplant roots

Abstract 

This study was conducted to select endophytic actinomycetes as biocontrol agents against Chinese cabbage clubroot caused by Plasmodiophora brassicae. A total of 81 endophytic actinomycetes were isolated from surface-sterilized roots of Chinese cabbage that was grown on paddy field and upland soils collected from various locations in Korea. By using 16S ribosomal DNA (rDNA) gene sequencing, they were classified to 8 actinobacterial genera. The genus Microbispora (67%) was most frequently isolated, followed by Streptomyces (12%) and Micromonospora (11%). Three of the 81 isolates, when inoculated in germinated Chinese cabbage seeds and then transplanted to pots, effectively suppressed the occurrence of a post-inoculated strain of P. brassicae in the pots. They showed control values of 58% for strain A004, 33% for strain A011, and 42% for strain A018. Based on cell wall components, morphological characteristics, and phylogenetic analyses, the three antagonistic isolates were identified as Microbispora rosea subsp. rosea (A004 and A011) and Streptomyces olivochromogenes (A018). Further researches on the field efficacy and action modes of the three actinomycetes are in progress.

ISSN 

1017-7825

Link 

http://dx.doi.org/10.4014/jmb.0800.108

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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