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《Chinese Journal of Oil Crop Sciences》 2008-01
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Accumulation pattern of fatty acids during the seed development of sesame(Sesamum indicum L.)

LI Xiao-dan, XIAO Ling, WU Gang, WU Yu-hua, ZHANG Xiu-yong,LU Chang-ming(Department of Genetic Engineering and GMO Biosafety, Oil Crops Research Institute, CAAS, Wuhan 430062,China )  
Accumulation pattern of fatty acids during the seed development of sesame (Sesamum indicum L.) was studied by using the cultivar EZHI 2. Results showed that there were seven different fatty acids found in the early seed developing stage and the type of fatty acids reduced to four in the mature seeds. Linoleic acid and oleic acid accounted for over 80% of the total fatty acids in mature seeds. C18∶3 and C16∶2 disappeared in the halfway of seed development. The quantity of the total fatty acids changed during seed development in a way as a S-shape curve. The quantity of the total fatty acids dropped significantly after reaching its peak around 38 days after flowering, which lowered oil content. During sesame seed development, oleic acid and linoleic acid accumulated simultaneously, and they showed highly positive significant correlation. Both oleic acid and linoleic acid played dominant role in fatty acid compositions in sesame seeds. It suggests that genes for fatty acid desaturase 2 (FAD2) and for stearoyl-ACP desaturase (SAD) are the major determinants in improving fatty acid composition in sesame.
【Fund】: 国家自然科学基金(30471099)
【CateGory Index】: S565.3
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