THE OIL OF WHEAT STEM RUST UREDOSPORES: II. THE ISOLATION OF CI5-9,10-EPOXYOCTADECANOIC ACID, AND THE FATTY ACID COMPOSITION OF THE OIL

Abstract

The fatty acids of the oil from, the uredospores of Puccinia graminis var. tritici, race 15B, have been examined. Cis-9,10-epoxyoctadecanoic acîd, which has not previously been found in natural fats, is present as a glyceride. The fatty acids were analyzed by gas liquid phase chromatography and the percentages are as follows: myristic 2.9, palmitic 47.4, stearic 4.4, oleic 4.8, linoleic 3.3, linolenic 6.3, cis-9,10-epoxyoctadecanoic acid 28.5, and small amounts of lauric, pentadecanoic, and arachidic acids.