| 摘要: |
| 采用5 kJ/m2的短波紫外线(UV-C)辐照鸭梨,研究其对鸭梨采后品质及防御性酶的影响。实验显示:5kJ/m2的UV-C处理能够显著抑制果实病斑的扩展,至接种后第7天,病斑直径与对照相比减小了17%。贮藏过程中,UV-C处理有效延缓了鸭梨果实硬度及可溶性固形物(SSC)的下降,在处理后第14天辐照果的硬度为5.55,比对照高出9%,而可溶性固形物在贮藏后第7、14、28和42天分别较对照高6%、12%、5%和11%;同时UV-C处理诱导了果实中苯丙氨酸解氨酶(PAL)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)活性的增加。研究结果表明UV-C处理为有效的鸭梨保鲜方法。 |
| 关键词: 鸭梨 短波紫外线 抗病性 采后品质 防御性酶 保鲜 |
| DOI：10.11841/j.issn.1007-4333.2009.02.037 |
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| 基金项目:国家“十一五”科技支撑计划资助(2006BAD22B03) |
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| Effects of UV-C on post-harvest quality and disease resistance of Yali pear fruit |
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| Abstract: |
| Post-harvest quality and the activity of defense enzymes were analyzed in harvested Yali pear(Pyrus bretschneideri Rehd.) after exposure to an UV-C irradiation level of 5 kJ/m2.This dose of UV-C irradiation significantly inhibited disease development in fruits inoculated with Monilinia fructicola;the disease lesion diameter in mature pears irradiated with UV-C was 17% lower than in control.And the treatment delayed the decline in fruit firmness and soluble solids content(SSC) in Yali pear.The firmness of tr... |
| Key words: Yali pear UV-C disease resistance post-harvest quality protective enzyme preservation |
