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Structural Studies on the Phytotoxins Produced by a Pathotype of Alternaria Citri Causing a Brown Spot Disease of Mandarins

  • Y. Kono
  • J. M. Gardner
  • Y. Suzuki
  • S. Takeuchi
Conference paper
Part of the NATO ASI Series book series (volume 27)

Abstract

The structures of eight components of the host-selective ACTG-toxin from strains of Alternaria citri, causing a brown spot disease of Dancy tangerine and other mandarin species, were identified by analyses of the MS and NMR spectra of the native toxins and their acetates (ACTG-toxins G & H, Figure 1). Two other novel compounds were simultaneously produced: dihydrosporogen AO-1 with an eremo-philane type sesquiterpene structure (Figure 1) and nonselective dihydrotentoxin with a L-phenylalanine moiety instead of the dehydro-alanine of tentoxin. Tentoxin and tenuazonic acid were present in the same cultures.

Keywords

Organic Chemistry Structural Study Chemical Research 1The Institute Brown Spot 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • Y. Kono
    • 1
  • J. M. Gardner
    • 2
  • Y. Suzuki
    • 1
  • S. Takeuchi
    • 1
  1. 1.The Institute of Physical and Chemical ResearchWako-shi, SaitamaJapan
  2. 2.The Citrus Research and Education CenterUniversity of FloridaLake AlfredUSA

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