The Component Fatty Acids of Oils Found in Spores of Plant Rusts and Other Fungi. Part Iii

The fatty acid compositions of the oils of several spore forms of seven species of Gymnosporangium were determined by gas–liquid chromatography. No simple relationships were found between the host plants and the compositions of the spore oils. cis-9, 10-Epoxyoctadecanoic acid was found in the teliospore oil of five of the species. The oil of basidiospores closely resembled that of teliospores but there was considerable variation in the oil of aeciospores. In one species the aeciospore and teliospore oils were very similar to each other, in another species there was partial resemblance, and in a third species they were different. The fats from four "axenic" cultures of Gymnosporangium juniperi-virginianae Schw. were analyzed, and were quite different from those of any of the rust species but resembled those frequently obtained from the vegetative stages of many species of fungi.