Accumulation of anthraquinones in the reddish brown-colored polyoxin-resistant mutants of Cochliobolus heterostrophus |
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| Authors: | C Tanaka H Miyagawa Y Kuwahara M Tsuda |
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| Institution: | (1) Laboratory of Environmental Mycoscience, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan Tel. +81-75-753-6305; Fax +81-75-753-6312 e-mail: tsudam@kais.kyoto-u.ac.jp, JP;(2) Laboratory of Bioregulation Chemistry, Graduate School of Agriculture, Kyoto University, Kyoto, Japan, JP;(3) Laboratory of Chemical Ecology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan, JP |
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| Abstract: | Cochliobolus heterostrophus Pol2 and Pol5 mutants are pleiotropic, and each mutant gene is responsible for alterations of both unrelated phenotypes: reddish-brown pigmentation
and polyoxin resistance. The three pigments accumulated in these mutants were isolated. Structural characterization by spectroscopic
analyses indicated that these three pigments were polyhydroxyanthraquinones: emodin, chrysophanol, and citreorosein. Emodin
is known to be an antidote against benzimidazole fungicide, although no antidoting activity against polyoxin was observed.
Received: February 12, 2002 / Accepted: April 27, 2002 |
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| Keywords: | Anthraquinone Bipolaris maydis Chrysophanol Cochliobolus heterostrophus Emodin |
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