Polar lipids of water‐metyn (Citrullus vulgaris) and squash‐melon (Citrullus vulgaris variety fistulosus) Seeds

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Abstract
Qualitative and quantitative analysis of the polar ttpids in water‐melon (Citrullus vulgaris) and squash, melon (Citrullus vulgaris variety fistulosus) is reported under the present study. Eight classes of polar ttpids, i.e. lysophosphatidylcholine, lysophosphatidylethanolamine, phosphatidylinositol, phosphatidyiethanolamine, phosphatidylglycerol, monogalactosyldiglyceride and phosphatidic acid have been identified. In both the species, phosphatidylcholine and phosphatidyl inositol formed the major portion of the ttpids. The squash‐melon was found to contain a higher proportion of monogalactosyldiglycerides and phosphatidyl ethanolamine than water melon. Only a few fatty adds (palmitic, stearic, oleic and linoleic) were present in a measurable amount in the seed oils of these species with linoleic as the major and stearic as the minor one. There was great variation in the fatty add composition in different classes of polar lipids. The two species seem to be closely related to each other regarding their lipid make‐up. They differ only in the fatty acid composition and the relative proportions of various classes of polar lipids.