| 摘要: |
| 目的 以茎瘤芥为试材， 研究不同浓度的高CO2短时处理对新鲜茎瘤芥采后衰老的影响。方法将预冷后的茎瘤芥分别充入CO（ 2 30%） ＋N（ 2 70%）， CO（ 2 40%） ＋N（ 2 60%）， CO（ 2 50%） ＋N（ 2 50%） 等3种混合气体（均用体积分数表示）， 以相同条件下充入空气的处理作为对照， 然后置于温度为（4 ±1）℃、 相对湿度为90%～95%的气候箱中处理48 h。结束处理的茎瘤芥用厚度为0.03 mm 的聚乙烯袋包装， 置于温度为（4 ± 1）℃、 相对湿度为90%～95%的条件下贮藏， 定期测定其呼吸强度、 衰老相关酶活性、 VC含量等指标。结果 高CO（ 2 30%， 40%， 50%）短时处理可有效降低茎瘤芥的呼吸强度， 高CO（ 2 30%， 40%）处理使贮藏后期的茎瘤芥果皮保持了较高的超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性， 同时抑制了果皮过氧化物酶（POD）、 多酚氧化酶（PPO）活性上升和果皮VC含量的降低，高CO（ 2 40%）短时处理效果最明显； 高CO2处理对于茎瘤芥果肉衰老相关指标无显著影响。结论 高CO（ 2 40%） 短时处理能有效延缓茎瘤芥采后衰老进程， 保鲜效果最好。 |
| 关键词: 茎瘤芥 高CO2短时处理 气调包装 衰老 |
| DOI： |
| 分类号:TS206 |
| 基金项目:国家级大学生创新创业训练计划项目 （201410635048）； 重庆市科技攻关项目 （cstc2012gg-yyjsB80003） |
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| Effects of Short-term High CO2 Treatment on Senescence of Postharvest Tumorous Stem Mustard |
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JIANG Jing-jing, CHEN Jie, ZHOU Ya-han, ZENG Kai-fang
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Collage of Food Science, Southwest University， Chongqing 400715， China
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| Abstract: |
| Effects of short-term high CO2 treatment at different concentrations (30% and 40% and 50% ) on the senescence of postharvest tumorous stem mustard were investigated. Fresh tumorous stem mustards were treated with mixed gas of CO2(30%)+N2(70%), CO2(40%)+N2(60%) and CO2(50%)+N2(50%) respectively after pre-cooling, using ambient atmosphere as the control, and stored in Climate box at (4 ± 1) ℃ and 90%~95% relative humidity (RH) for 48 h. After short-term CO2 treatment, tumorous stem mustards were stored in polyethylene package with a thickness of 0.03 mm at (4 ± 1) ℃ and 90% ~95% RH, and the respiration intensity, activity of senescence-related enzyme, Vitamin C content were determined at regular time interval during the storage. The experimental results showed that short-term high CO2 treatment at the concentrations of 30% and 40% and 50% could significantly reduce the respiration intensity of tumorous stem mustards. Short-term high CO2 at the concentrations of 30% and 40% could keep higher activities of superoxide dismutase (SOD), catalase (CAT) , and inhibit the increase of peroxidase (POD) and polyphenol oxidase (PPO) activities as well as the decline of Vitamin C content in peel of tumorous stem mustards. The effect of short-term CO2 at the concentrations of 40% was the most remarkable. However, short-term high CO2 treatment could not obviously affect the senescence-related indicators of tumorous stem mustard pulp. Short-term high CO2 at the concentrations of 40% could delay the senescence progress of postharvest tumorous stem mustard. |
| Key words: tumorous stem mustard short-term high CO2 treatment modified atmosphere package senescence |
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