白花树种子成熟期含油率和脂肪酸变化规律_石从广 . Seed oil production rate and fatty acid content of Styrax tonkinensis during seed maturation

Abstract

To determine variation in oil production rate and fatty acid content during the nut maturation period(between September and October) of Styrax tonkinensis,seven batches of nuts were collected from samples taken every 12 d from mid-August to late October.After a series of airing and peeling treatments,seeds obtained as a result of threshing were measured for seed hundred-grain weight,oil production rate,and fatty acid content.Results showed that the stage from September 27th to October 9th was the inflection point for nut and seed maturation due to strong variation in nut and seed characteristics.During this stage,nut shells began to dehydrate and dry matter accumulated rapidly.As nuts and seeds matured,saturated fatty acid content declined with content of most unsaturated fatty acids rising gradually.However,linoleic acid content declined sharply.These results have theoretical importance for determining harvest time and appropriate storage techniques for S.tonkinensis nuts.