Changes in Oil During Seed Germination of Malania oleifera
In order to understand the changes of oil and fat in seeds rich in very long-chain fatty acids during germination,the oil content and fatty acid composition in different organs and tissues of Malania oleifera seeds were detected in six stag-es of seed germination.Through the analysis of its changing trend and difference,a reasonable explanation was provided for the accumulation of a large amount of very long-chain fatty acids in mature seeds of M.oleifera.The results showed that the utilization of lipids during germination was concentrated in the stage of seedling morphogenesis,at which time the lipid content in the endosperm decreased rapidly,and the lipid consumption of the endosperm near the radicle was earlier than that of other parts.Eleven kinds of fatty acids were detected in the endosperm,among which the content of nervonic acid(C24:1)was the most abundant and decreased the most during germination.However,the roots,stems and leaves of vegetative organs did not show a preference for the accumulation of nervonic acid and erucic acid.The results showed that very long-chain fatty acids were the source of energy and nutrition for seed germination.
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