Analysis of Nutrient Components and Active Ingredients of Morus nigra L.and M.alba L.var.tatarica in Xinjiang Autonomous Region
The fruits,leaves and barks of Morus nigra L.and M.alba L.var.tatarica,two special plants in Xinjiang autonomous region,were analyzed by high performance liquid chromatography (HPLC),atomic absorption spectrometry,UV spectrophotometry and conventional methods for amino acids,mineral elements,flavonoids,polysaccharides,and alkaloids.The results showed that different plant parts of both mulberry species were rich in a wide variety of amino acids (17 amino acids) with an essential amino acid to total amino acid ratio higher than 0.60,and contained abundant health beneficial mineral elements and bioactive ingredients.Alkaloids,flavonoids and polysaccharides were the most abundant in the fruits and barks ofMorus nigra L.,and the fruits ofM.alba L.var.tatarica (1.393,11.999 and 337.491 mg/g on a dry basis),respectively.Four principal components,which had a cumulative variance contribution ratio of 97.000% to the information on 29 initial indexes,were extracted in principal component analysis (PCA).Morus nigra L.scored higher overall,thereby having higher medicinal value.