بررسی تغییرات کمی و کیفی اسیدهای چرب بذر نسترن کوهی (Rosa canina L.)

Abstract

Abstract This experiment was conducted to study the effect of south-west climatic conditions on quantitative and qualitative of fatty acids in dog rose (Rosa canina L.) seeds collected from five regions including: Semirom (Isfahan Province), Kiar and Gerdbishe (Charmahal and Bakhtiari Province), Yasuj and Meymand (Kohgiluye and Boyer Ahmad Province). Oil was extracted using Soxhlet apparatus; the fatty acid composition of oil was characterized and quantified using GC. The highest and lowest oil percentage obtained from Meymand (11.05%) and Kiar (8.15%), respectively. The results confirmed the presence of five dominant fatty acids in seeds of dog rose, including: linoleic, oleic, linolenic, palmitic and stearic acid, respectively. Results showed that differences between fatty acids quantity in regions under study was significant (P<1%). The highest amount of linoleic, oleic and linolenic acid was related to Gerdbishe (52.09%), Semirom (40.47%) and Kiar (17.47%), respectively. The lowest amount of linoleic, oleic and linolenic acid was obtained from Semirom (37.24%), Gerdbishe (22.69) and Meymand (12.85%), respectively. The highest amount of palmitic and stearic acid was related to Meymand (4.91%) and Kiar (3.88%), respectively; and the lowest amount of palmitic and stearic acid was related to Meymand (4.04% and 2.17%, respectively). The highest and lowest amount of unsaturated fatty acids was related to Semirom (92.65%) and Yasuj (90.07%), respectively. Differences between amounts of fatty acid composition of dog rose seeds in regions under study was as result of difference in climatic factors. Key words: Rosa canina, Fatty Acid, Seed, South-west of Iran