以马铃薯克新13号为材料，采用γ－氨基丁酸（0．2～5．0 mmol／L）浸种处理，通过测定种薯淀粉酶活性的变化、淀粉含量、还原糖含量、芽条长度和地上地下部干鲜重等生理指标，研究了γ－氨基丁酸对马铃薯萌发的作用效应。结果表明，γ－氨基丁酸可能通过提高淀粉酶活性，促进淀粉分解，提高还原糖含量，促进幼芽伸长及地上地下部干鲜重等生理指标，促进马铃薯萌发和干物质的积累。当γ－氨基丁酸处理浓度为1．0 mmol／L时，促进萌发效果最佳。%In this study, potato (Kexin No.13) was used as the material to study the effect of soaking application of γ-aminobutyric acid ( from 0.2 to 5.0 mmol/L) on the potato germination .The changes of amylase activity , starch content , reducing sugar content , bud length , fresh and dry weight of shoot and root in seed potatoes were measured and determined in the experiment .The results showed that appropriate amount of γ-aminobutyric acid may improve the germination of potato and dry matter accumulation of buds by elevating the activity of starch enzyme , promoting the decomposition of starch , increasing reducing sugar content , facilitating the plu-mule elongation and improving the dry and fresh weight of shoot and root .γ-aminobutyric acid at the concentration of 1.0 mmol/L showed the optimal effect on potato germination .
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