Abstract
Lipophilic bioactive compounds in kernel oils recovered from fruit pits of six sour cherry (Prunus cerasus L.) cultivars were studied. Oil yields ranged between 17.5–37.1%, with an average of 31.8%. The main fatty acids were linoleic (35.50–46.06%), oleic (25.25–45.30%), α-eleostearic (7.43–15.76%) and palmitic (5.06–7.38%), containing 94–96% of total detected fatty acids. The range of total tocochromanols was between 118.2 and 163.6mg/100g of oil. Independent of the cultivar, γ-T was the main tocochromanol and constituted between 61 and 83% of the total identified tocopherol and tocotrienol homologues in all studied samples. The total content of the carotenoids was between 0.51–1.75mg/100g of oil. The concentration of squalene in different sour cherry kernel oils was reached between 65.8–102.8mg/100g of oil. The concentration of sterols varied significantly for all of the studied cultivars and ranged between 313.6–1041.3mg/100g of oil. The β-sitosterol constituted 77–82% of the total sterol content detected in the samples studied. Two significant correlations were found between oil yield and the total content of sterols (r=−0.974, p≤0.001) and carotenoids (r=−0.915, p≤0.01) in sour cherry kernel oils.
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