马关县不同产地草果氨基酸组成与分析

目的 研究马关县不同产地草果中氨基酸含量与组成。方法 采用Biochrom30+型氨基酸分析仪检测5个乡镇产草果中氨基酸。结果 草果M2、M4、M5检出17种氨基酸,7种必需氨基酸；草果M1、M3检出16种氨基酸,未检出蛋氨酸,且不同产地草果的氨基酸具有差异。草果TAA为36.02mg/g～45.79mg/g,EAA为14.71mg/g～16.42mg/g,以谷氨酸(6.67mg/g),天冬氨酸(4.72mg/g)含量较高。氨基酸比值系数法显示草果中蛋氨酸+胱氨酸、赖氨酸均为不足,亮氨酸、苯丙氨酸+酪氨酸、缬氨酸均为过剩,第一限制性氨基酸为蛋氨酸+胱氨酸。草果中呈味类氨基酸和药用氨基酸含量丰富,分别占TAA的89%、64%。SRC比值系数分显示草果M2得分最高,为65.40。结论 不同乡镇产草果中的氨基酸含量有显著差异,综合分析氨基酸营养价值最高的是草果M2。

Amino acid composition and analysis of Amomum tsaoko from different producing areas in Maguan County

Objective To study the content and composition of amino acids in Amomum tsaoko Crevost Lemaire from different areas in Maguan County. Methods Amino acids in Amomum tsaoko Crevost Lemaire collected from five towns was detected with Biochrom30+ type amino acid analyzer. Results The contents of total amino acids were ranged from 36.02 to 45.79mg/g, while essential amino acids were 14.71 to 16.42mg/g, among which the glutamic acid (6.67mg/g) and aspartic acid (4.72mg/g) were the higher. The proportions of essential amino acids were similar in M1, M2, M3 and M5 approaching to the ideal protein pattern. The ratio coefficient method of amino acid showed that methionine + cystine, lysine were insufficient, leucine, phenylalanine + tyrosine, valine were excessive, and the first limiting amino acid was methionine + cystine. The contents of flavorful amino acids and medicinal amino acids were abundant, whose proportion were 89% and 64% of TAA respectively. The SRC ratio showed that M2 was the highest (65.40)among the groups. Conclusion There were significant differences in amino acid content in different towns, M2 has the highest nutritional value in amino acid.