Crystallization and X-ray Analysis of Stemphyloxin I, a Phytotoxin from Stemphylium botryosum.
Certain isolates of the plant-pathogenic fungus Stemphylium botryosum produce a phytotoxin, stemphyloxin I. This toxin (C(21)H(34)O(6)) was crystallized and its structure was determined by x-ray crystallography to be a beta-ketoaldehyde trans-Decalin. This compound is a highly unusual natural product. Iron (Fe(3+)) controls production of toxin by this fungus. Furthermore, iron reacts with the toxin to yield a colored product which aids in its detection on chromatograms and in its quantitative estimation by colorimetry.;
Barash
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I
Manulis
S
S
Kashman
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Y
Springer
J P
JP
Chen
M H
MH
Clardy
J
J
Strobel
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GA