Phytotoxins from stemphylium botryosum: structural determination of stemphyloxin II, production in culture and interaction with iron

Shulamit Manulis, Yoel Kashman, David Netzert, Isaac Barash

Research output: Contribution to journalArticlepeer-review

Abstract

Stemphyloxin II, a new phytotoxic compound isolated from liquid cultures of Stemphylium botryosum f. sp. lycopersici has been identified as a tricyclic compound derived from stemphyloxin I. Production of stemphyloxins I and II increases by 4-6 fold in the presence of succinate, fumarate or malonate. The secretion of stemphyloxins is iron-regulated and both compounds act as ferric chelates. The phytotoxicity of stemphyloxin I is approximately 100-fold higher than that of stemphyloxin II. The possible role of stemphyloxins in iron acquisition by S. botryosum is discussed.

Original languageEnglish
Pages (from-to)2193-2198
Number of pages6
JournalPhytochemistry
Volume23
Issue number10
DOIs
StatePublished - 1984

Keywords

  • Stemphylium botryosum
  • iron.
  • phytotoxins
  • stemphyloxin I
  • stemphyloxin II

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