Abstract
Summary The total crude lipids of Sclerotium and Allium cepa (healthy and infected with Sclerotium cepivorum ) were extracted and quantitatively determined. Infection seemed to induce a decrease in the total lipid content of the infected host. Total lipids were separated into polar and non-polar fractions. The polar lipids of the parasite were qualitatively, but not quantitatively, the same as those of the host, whereas non-polar lipids differed qualitatively as well as quantitatively. Infection induced the disappearance of phosphatidyl glycerol and monogalactosyl diglyceride, previously present in the host, whereas the proportional amount of phosphatidyl serine, phosphatidyl inositol, lecithine, phosphatidyl ethanolamine and/or digalactosyl diglyceride and sterol glycoside decreased as a result of infection. Non-polar lipids, identified as diglycerides and squalene, disappeared from the host as a result of infection, while the proportional concentration of triglycerides increased.
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