萌发大麦种子内肽酶活力、醇溶蛋白及氨基酸含量变化

以两个大麦品种垦啤8号和Harrington为材料研究了大麦种子萌发过程中体内醇溶性蛋白质、游离氨基酸和内肽酶活力的变化。垦啤8号大麦种子的醇溶蛋白含量高,但其降解量比Harrington多。垦啤8号游离氨基酸增长量略高于Harrington。整个大麦种子发芽期间,国产品种内肽酶活力始终高于进口品种。以上表明,与Harrington相比,虽然国产品种垦啤8号含氮量高,但其内肽酶活力升高快,最大酶活力高,醇溶蛋白降解、转化为可输出氮的进程快,有制造优质麦芽的潜力。

Changes in Endopeptidase Activity, Content of Hordein and Free Amino Acids in Barley Seeds during Germination

Two species barleys, Hordeum sp. Kenpi No. 8 and Hordeum sp. Harringto were used to study changes in contents of hordein, free amino acids and endopeptidase activity during germination. Results showed that the content of hordein in Kenpi 8 was higher than that of Harrington, but decreased faster. The same tendency of free amino acids and endopeptidase activity appeared in the two species barleys during germination. It implied that, compared with Harrington, the procedures of hordein break down and transfer to transportable nitrogen in Kenpi 8 was higher and faster during germination, and this maybe an important reason of Kenpi 8 has potential to make high-quailty malt.