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Applied and Environmental Microbiology, December 1998, p. 5030-5032, Vol. 64, No. 12
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Indole-3-Acetic Acid Biosynthesis in Colletotrichum gloeosporioides f. sp. aeschynomene

M. Robinson,1 J. Riov,2 and A. Sharon1,3,*

Department of Plant Sciences1 and Institute of Cereal Crop Improvement,3 Tel Aviv University, Tel Aviv 69978, and Department of Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100,2 Israel

Received 27 May 1998/Accepted 10 October 1998

We characterized the biosynthesis of indole-3-acetic acid by the mycoherbicide Colletotrichum gloeosporioides f. sp. aeschynomene. Auxin production was tryptophan dependent. Compounds from the indole-3-acetamide and indole-3-pyruvic acid pathways were detected in culture filtrates. Feeding experiments and in vitro assay confirmed the presence of both pathways. Indole-3-acetamide was the major pathway utilized by the fungus to produce indole-3-acetic acid in culture.

* Corresponding author. Mailing address: Department of Plant Sciences, Tel Aviv University, Tel Aviv 69978, Israel. Phone: 972-3-6406741. Fax: 972-3-6409380. E-mail: a55555{at}post.tau.ac.il.

Applied and Environmental Microbiology, December 1998, p. 5030-5032, Vol. 64, No. 12
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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