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논문 기본 정보

자료유형
학술저널
저자정보
Atapour, Maryam (Department of Entomology, College of Agriculture, Tarbiat Modares University) Moharramipour, Saeid (Department of Entomology, College of Agriculture, Tarbiat Modares University) Barzegar, Mohsen (Department of Food Science and Technology, College of Agriculture, Tarbiat Modares University)
저널정보
한국응용곤충학회 Journal of Asia-Pacific Entomology Journal of asia-pacific entomology 제10권 제1호
발행연도
2007.1
수록면
33 - 38 (6page)

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Cold acclimation and overwintering state can affect fatty acid compositions of insects. To determine compositional change of fatty acids during nondiapause and diapause stages, an experiment was conducted to investigate fatty acid constituents from whole body of C. suppressalis larvae. Five most abundant fatty acids were found to be palmitoleic (35-58%), palmitic (18-44%), oleic (14-23%), stearic (0.5-2.5%) and linoleic acid (0.4-2%). However, linolenic, erucic, lauric and myristic acid were found at lower level. Saturated fatty acids significantly decreased and conversely unsaturated fatty acids increased from August (pre-diapause) to October (initiation of diapause). The increase in seasonal cold hardiness during cold acclimation, exposed at $-15^{\circ}C$ for 24 h, was related to degree of fatty acid un-saturation. The elevation of palmitoleic acid content at low temperature resulted in an increase in the overall degree of unsaturation in the whole body. These results indicated the importance of unsaturated fatty acids composition to prepare larvae entering diapause phase.

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