The contribution of different α-amylase isoenzymes of the commodity grain spring wheat in the formation of falling number values
Tóm tắt
The participation of various isoenzymes of α-amylase in the formation of falling number values of the commodity grain of wheat grown in the Republic of Kazakhstan was investigated. It was found that active isoenzymes α-AMY1 and α-AMY2 of the embryonic shield were present in the grain with an index over 200. A significant decrease in the falling number depended mainly on the synthesis of α-AMY1 and α-AMY2 isoenzymes in the aleurone layer. In the grain, isoenzymes with high isoelectric points (p1 ≥ 7.3) were found these isoenzymes belong to α-amylase or late maturing or α-amylase of practically mature grains. It was discovered that the exogenous hormone (gibberellic acid) induced synthesis of α-amylase isoenzymes of scutellum, whole caryopses, and aleurone. It was shown that the impact of exogenous gibberellic acid on the activity and structure of α-amylase is reduced in grain with a low falling number.
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