摘要:
通过氨基酸自动分析仪测定了30份枇杷种质花的游离氨基酸含量,结果表明,枇杷花中氨基酸种类齐全,参试种质的枇杷花均含有16种氨基酸,其中包括苯丙氨酸(Phe)、苏氨酸(Thr)和赖氨酸(Lys)等7种人体必需氨基酸。枇杷花中游离氨基酸含量最高的为苏氨酸(Thr),含量为238.46~727.45 mghg-1,含量最低的氨基酸为甲硫氨酸(Met),含量仅为0.21~3.92 mghg-1。大叶杨墩枇杷花的总氨基酸(TAA)、必需氨基酸(EAA)和非必需氨基酸(NAA)含量均最高,分别是含量最低种质的2.69倍、2.95倍和3.11倍。不同来源地枇杷种质的TAA含量、NAA含量和EAA/TAA差异均未达到显著水平,但EAA含量差异显著;不同果肉颜色枇杷种质的TAA、EAA和NAA含量及EAA/TAA差异不显著;几个野生种质的NAA含量平均值显著低于栽培种,TAA和EAA含量差异不显著。
Abstract:
Free amino acids in the flowers of 30 loquat germplasms were determined using an automatic amino acid analyzer. The results showed that all samples contained 16 amino acids. Among them, 7 were essential amino acids, including Phe, Thr and Lys. The content of Thr was the highest (i.e., 238.46-727.45 mghg-1) and Met the lowest (i.e., 0.21-3.92 mghg-1). The greatest contents of TAA, EAA and NAA were found in the flowers of Dayeyangdun loquat, which were 2.69, 2.95 and 3.11 times of the lowest contents, respectively. No significant differences were found among the 30 loquat germplasms in the contents of TAA and NAA, nor EAA/TAA ratio. But, EAA in the flowers of loquat germplasms from different regions showed significant differences. No significant differences were found on the contents of TAA, EAA and NAA or EAA/TAA ratio in the flowers of loquat germplasms with flesh of different colors. The average NAA in flowers of several wild loquat germplasms was significantly lower than that of the loquat cultivars, while TAA and EAA showed no significant differences.
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