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Characterization of nonpathogenic Cadophora gregata, a potential biological control agent, concomitantly isolated from soil infested with Cadophora gregata f. sp. adzukicola, the cause of adzuki bean brown stem rot

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Title: Characterization of nonpathogenic Cadophora gregata, a potential biological control agent, concomitantly isolated from soil infested with Cadophora gregata f. sp. adzukicola, the cause of adzuki bean brown stem rot
Authors: Tanaka, Soichi Browse this author
Murayama, Keiko Browse this author
Kondo, Norio Browse this author
Akino, Seishi Browse this author
Keywords: Adzuki bean
Biological control
Brown stem rot
Cadophora gregata
Nonpathogenic
Issue Date: Apr-2010
Publisher: Elsevier
Journal Title: Biological Control
Volume: 53
Issue: 1
Start Page: 112
End Page: 121
Publisher DOI: 10.1016/j.biocontrol.2009.12.012
Abstract: We collected 555 isolates of Cadophora gregata from adzuki bean field soils in Hokkaido, Japan, from 1997 to 2000. To identify the brown stem rot (BSR) pathogen C. gregata f. sp. adzukicola, we screened these isolates for pathogenicity to adzuki beans. Of the isolates, all of which originated in Tokachi District, Hokkaido, Japan, 23 were avirulent to adzuki bean, soybean, or mung bean. However, polymerase chain reaction (PCR) with specific primers for C. gregata f. sp. adzukicola (BSRA1 and BSRA2) detected the specific identifying DNA fragment in these isolates, and cluster analysis with inter-simple sequence repeat markers showed that the isolates were phylogenetically closer to strains that are virulent to adzuki bean. Thus, we concluded that the isolates were nonpathogenic C. gregata. A few selected isolates of the nonpathogenic C. gregata were effective at reducing BSR in vivo and show potential for development as biological control agents.
Type: article (author version)
URI: http://hdl.handle.net/2115/42760
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 近藤 則夫

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