以国家果树种质福州龙眼圃32份龙眼种质资源为材料，测定分析了其干花中18种氨基酸的含量和组成，并对其营养模式进行分析评价。结果表明，龙眼花中总氨基酸含量（TAA）为8091．06 mg·hg－1，其中谷氨酸含量最高为1008．26 mg·hg－1，而胱氨酸含量最低仅为17．19 mg·hg－1，谷氨酸、天门冬氨酸、赖氨酸、亮氨酸、精氨酸、缬氨酸、脯氨酸等7种氨基酸是龙眼花中主要的氨基酸，占TAA含量的59．31％。不同龙眼种质资源中氨基酸积累差异明显，18种氨基酸的变异系数为11．00％～80．01％。营养评价分析表明，32份龙眼花中必需氨基酸（EAA）含量占 TAA 含量的38．91％～42．94％，2份龙眼共有4项优于氨基酸模式谱比例，（蛋氨酸＋胱氨酸）是龙眼花的第一限制氨基酸。龙眼种质资源花中还含有丰富的功能氨基酸和味觉氨基酸。通过聚类分析初步提出龙眼花氨基酸高、中、低分级标准，筛选出5份高氨基酸含量的龙眼特异资源。%The amino acid contents and types of longan flower were analyzed based on longan germplasm. The results showed that,total free amino acid content (TAA)was up to 8 091. 06 mg·hg-1 with all 18 amino acid types,among them the highest amino acid was Glutamic acid (1 008. 26 mg · hg-1 ),and the lowest was Cysteine (17. 19 mg · hg-1 ) . Glutamic acid,aspartic acid,lysine,leucine,arginine,valine,proline,seven amino acids were the major amino acids of longan flowers,accounting for 59. 31%TAA content. The difference of amino acid was great among the longan genotypes, and the coefficient of variation was from 11. 00% to 80. 01% in 18 amino acids. The nutrition analysis showed that,the ratio of essential amino acid to total amino acid was from 38. 91% to 42. 94%. There were two longan genotypes with 4 good amino acid model ratios,as for Shiyue longan and Dawuyuan. And (Methionine+Cysteine)was the first limiting amino acid. There were abundant in functional amino acid and tasted amino acid from different longan genotypes. The 3 grading criteria of total amino acid contents was proposed based on cluster analysis,and 5 longan genotypes with highest amino acid content was selected for special longan germplasm.
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