Indole-3-acetic acid biosynthesis in <Emphasis Type="Italic">Aciculosporium
take</Emphasis>, a causal agent of witches' broom of bamboo |
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Authors: | Eiji Tanaka Chihiro Tanaka Atsushi Ishihara Yasumasa Kuwahara Mitsuya Tsuda |
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Institution: | (1) Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, kyoto 606- 8502, Japan, JP;(2) Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan, JP |
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Abstract: | Aciculosporium take (Ascomycota; Clavicipitaceae) is a causal agent of witches' broom of
bamboo plants. The symptoms of this disease are believed to be induced by plant
hormones, particularly auxins. Indole-3-acetic acid (IAA) was identified in
cultures of this fungus in an l-tryptophan-supplemented liquid medium.
IAA production was confirmed on 30 isolates of A. take from various
hosts and locations at levels up to 1 mg/l. The biosynthetic pathway of
IAA in A. take culture was examined by analyzing intermediate products
and by feeding experiments. The results showed that the indole-3-pyruvic acid
pathway (l-tryptophan → indole-3-pyruvic acid → indole
acetaldehyde → IAA) was the dominant pathway in A. take.
Received: June 3, 2002 / Accepted: July 25, 2002 |
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Keywords: | Aciculosporium take Clavicipitaceae Witches' broom of bamboo Indole-3-acetic acid Biosynthesis |
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