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Does Soil Salinity Affect Yield and Composition of Cottonseed Oil
- Ahmad, Sajjad, Anwar, Farooq, Hussain, Abdullah Ijaz, Ashraf, Muhammad, Awan, Abdul Rasul
- journal of the American Oil Chemists' Society 2007 v.84 no.9 pp. 845-851
- Gossypium hirsutum, oil crops, cottonseed, cottonseed oil, physicochemical properties, lipid content, fatty acid composition, tocopherols, soil chemical properties, soil physical properties, soil salinity, salt stress, soil water, Pakistan
- Variation in the yield and composition of oil of cotton (Gossypium hirsutum) seed collected from two different sites (saline and non-saline) of Pakistan was examined. Hexane-extracted oil content of cottonseed from saline and non-saline areas was found to be 17.7 and 18.6%, respectively. No significant (P > 0.05) differences in the refractive index (40 °C), color, specific gravity (24 °C), iodine, free fatty acid, peroxide, unsaponifiable matter, saponification, conjugated diene and triene and p-anisidine values of the oils of cotton plants from saline and non-saline habitats were observed. Fatty acid compositional analysis showed the concentration of stearic (C₁₈:₀) and oleic (C₁₈:₁) acids to be significantly (P <= 0.05) higher, whereas that of linoleic (C₁₈:₂) acid was lower in cottonseed oils from the saline area than those from the non-saline habitat. Tocopherol contents of cottonseed oils were significantly (P <= 0.05) higher from the saline area than those from the non-saline area. The results of the present study showed that soil salinity did not affect the oil yield of cottonseed, however, it significantly (P <= 0.05) affected the tocopherol and fatty acid profiles of the oils examined.