THE COMPONENT FATTY ACIDS OF OILS FOUND IN SPORES OF PLANT RUSTS AND OTHER FUNGI. PART II

Abstract

The oils extracted from the spores of 17 species of rusts have been analyzed by gas–liquid chromatography. The spore oils of six species of Puccinia, three species of Cronartium, one species each of Frommea, Hemileia, Phragmidium, and Uromyces contained cis-9, 10-epoxyoctadecanoic acid but it was absent from two species of Gymnosporangium, one species of Puccinia, and one of Uromyces. The Puccinia species include eight races of wheat stem rust which had very similar fat compositions. The different spore forms of wheat and oat stem rust from both the alternate hosts were also quite similar in fat composition. The oils of the spores from the alternate hosts for one of the Gymnosporangium species were similar but for the other species there were marked differences.