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http://dx.doi.org/10.5423/RPD.2009.15.2.120

Role of Two New Phytotoxins in the Pathogenicity of Botrytis cinerea  

Kim, Geum-Jung (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Yoon, Mi-Young (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Kim, Heung-Tae (Department of Plant Medicine, Chungbuk National University)
Choi, Gyung-Ja (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Jang, Kyoung-Soo (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Choi, Yong-Ho (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Park, Myung-Soo (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Cha, Byeong-Jin (Department of Plant Medicine, Chungbuk National University)
Kim, Jin-Cheol (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Publication Information
Research in Plant Disease / v.15, no.2, 2009 , pp. 120-126 More about this Journal
Abstract
In the course of study on the roles of phytotoxins in the pathogenicity of Botrytis cinerea, we isolated two novel phytotoxins. They were identified as 3-O-acetyl botcinol and 3-O-acetyl botcinolide. In this study, we investigated correlation between the two phytotoxins and the pathogenicity of B. cinerea. In liquid cultures, the two phytotoxins were not produced by three low pathogenic isolates out of 25 B. cinerea isolates. Among strong or moderate pathogenic isolates, some produced the two phytotoxins, but the others did not. On the other hand, the ethyl acetate extracts of fermentation broths of 10 out of 25 isolates showed phytotoxic activity against various plants tested in a whole plant assay. The phytotoxins were detected in all of the 10 phytotoxic ethyl acetate extracts. In planta, the two phytotoxins were detected in all of the plant tissues infected with strong pathogenic isolates. However, there was no correlation between the ability of B. cinerea isolates to produce the two phytotoxins and their pathogenicities. The two phytotoxins began to detect in tomato plant tissues infected with B. cinerea 2-16 at 3 days after inoculation, increased gradually till 4 days after inoculation, and then decreased. The above results suggest that 3-O-acetyl botcinol and 3-O-acetyl botcinolide are one of pathogenicity factors for B. cinerea, but not a primary determinant of its pathogenicity.
Keywords
3-O-acetyl botcinol; 3-O-acetyl botcinolide; Botrytis cinerea; Pathogenicity; Phytotoxin;
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