Efficient conversion of L-tryptophan to indole-3-acetic acid and/or tryptophol by some species of Rhizoctonia

被引：33

作者：

Furukawa, T

Koga, J

Adachi, T

Kishi, K

Syono, K

机构：

[1] MEIJI SEIKA KAISHA LTD,BIOSCI LABS,SAKADO,SAITAMA 35002,JAPAN

[2] TACHIKAWA COLL TOKYO,AKISHIMA,TOKYO 196,JAPAN

[3] UNIV TOKYO,DEPT LIFE SCI,TOKYO 153,JAPAN

来源：

PLANT AND CELL PHYSIOLOGY | 1996年 / 37卷 / 07期

关键词：

auxin; fungi; IAA; indole-3-pyruvate pathway; Rhizoctonia; tryptophol;

D O I：

10.1093/oxfordjournals.pcp.a029037

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

In a study of various phytopathogenic fungi, we found that fungi that belong to the genus Rhizoctonia produce IAA efficiently from tryptophan. R. solani Kuhn MAFF-305219, in particular, produced large amounts of tryptophol (Tol), which was assumed to be a specific by-product of the indole-3-pyruvate (IPy) pathway, in addition to IAA. Therefore, this fungus seemed suitable for analysis of the function and the regulation of the biosynthesis of auxin by a fungal pathogen. Under normal aerobic conditions, the ratio of IAA to Tol synthesized by this strain was higher than that under less aerobic conditions. In metabolic studies with various indole derivatives, R. solani converted L-tryptophan and indole-3-acetaldehyde to IAA and Tol, but other indole derivatives were scarcely metabolized. These results suggest that both IAA and Tol are synthesized from tryptophan through the IPy pathway in Rhizoctonia.

引用

页码：899 / 905

页数：7

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