采后多胺处理对杏果实黑斑病的控制及贮藏品质的影响

以兰州大接杏果实为原料，研究了采后外源多胺处理对杏果实黑斑病的控制效果及对贮藏品质的影响。结 果表明采后多胺处理能显著抑制果实黑斑病的扩展，有效提高果实的抗病性，且控制效果存在多胺种类和浓度效 应，其中1.5 mmol/L精胺、1.5 mmol/L亚精胺和10 mmol/L腐胺的效果最佳，其病斑直径分别较对照减少了38.0%、 26.6%和34.2%。同时采后多胺处理能降低杏果实质量损失率，延缓硬度下降，抑制果实的呼吸强度和乙烯释放量 的升高，并且能有效延缓果实可溶性固形物含量的下降和颜色的变化。可见，多胺在杏果实防腐保鲜上具有较好的 应用前景。

Effect of Postharvest Polyamine Treatment on Black Spot Disease Control and Storage Quality of Apricot Fruits

The effect of postharvest exogenous polyamine treatment on black spot disease control and storage quality of apricot (cv. Dajiexing) fruits was studied. The results showed that this treatment significantly inhibited black spot development and increased disease resistance in apricot fruits and the effect was dependent on the type and concentration of polyamine. Moreover, the treatment with 1.5 mmol/L spermine, 1.5 mmol/L spermidine or 10 mmol/L putrescine was the most effective, resulting in a decrease in lesion diameter of 38.0%, 26.6% and 34.2%, respectively when compared with the control. At the same time, polyamine treatment reduced weight loss percentage, inhibited the increase of respiration intensity and ethylene release, and retarded the decline of fruit firmness, soluble solid content and color change. In a word, the findings suggested that polyamines may be promising for application in disease control and preservation of apricot fruits.