Comparison on Amino Acid Content in Fruits between Hippophae rhamnoides subsp.sinensis and Hippophae thibetana
To compare the amino acid quality and flavor of the fruits between Hippophae rhamnoides subsp.sinensis and Hippophae thibetana,we used an automatic amino acid analyzer to determine the content of amino acids in the fruits of the two sea-buckthorn species.The results showed that 17 amino acids were detected in the fruits of both species,with the total content of 68.83 mg/g in H.r.sinensis and 135.66 mg/g in H.thibetana.The proportion of essential amino acids was 49.59%in H.r.sinensis and 47.43%in H.thibetana.The content of medicinal amino acids,branched-chain amino acids,and aromatic amino acids in the fruits of H.thibetana was higher than that in the fruits of H.r.sinensis.The fruits of both H.r.sinensis and H.thibetana were sour.The evaluation based on the ratio coefficient and the fuzzy recognition methods suggested H.thibetana fruits had higher amino acid nutritional value than H.r.sinensis fruits.