摘要： 塑膜袋和双层纸袋所形成的微域环境不同,对果实氧化胁迫的影响有所差异。塑膜袋内的微域环境受"温室效应"的影响较大,不仅果实表面温度比较高,而且与外界环境差异比较大。所以,无论套袋期间还是除袋后果实受到的环境胁迫程度都比较严重,表现为果实O2和MDA含量显著增高。相对而言,双层纸袋似乎比较有利于诱导果实抗氧化能力的提高,不仅表现为套袋期间果实O2和MDA含量比塑膜袋低,而且,除袋后也能及时对外界环境做出应急响应,SOD活性保持较高活性,从而使O2和MDA含量维持较低水平。总的来看,套袋果除袋后对外界环境反应都比较敏感,表现为活性氧含量或抗氧化酶活性增高。为防止生理伤害的发生,生产上应注意在树冠西南面外围不要套塑膜袋,并且要特别重视适宜除袋时间和方法的选择。
关键词:
果袋,
套袋,
苹果,
果实,
氧化胁迫
Abstract: A difference in oxidative stress existed in peel tissuewhen fruits were covered with plastic film or doublelayerpaper bags because they created distinct microenvironments. Influenced strongly by 'greenhouse effect' with plasticf ilm bags, fruits had a higher surface temperatures and the microenvironment was significant ly different from the outside,showing higher O2and MDA contents during fruit enclosure and soon after bag removal.However, double- layer paperbags seemed to be favorable to rendering fruit with more ant ioxidative capability as a result of cross adaptat ion, exhibitingnot only lower levels of O2and MDA contents during fruit enclosure and after bag removal, but a quick response of antioxidativeenzyme( SOD) to scavenge activated oxygen species. On a whole, enclosed fruits became more sensitive to thenew environment soon after bag removal, so that an abrupt increase of O2contents or SOD act ivity occurred in fruits. Inorder to prevent fruits from physiological disorders, plastic film bags should not be applied on the periphery of southwestcanopy, and appropriate timing for bag removal has to be carefully considered.
Key words:
Fruit bags,
Bagging,
Apple,
Fruit,
Oxidative stress
中图分类号:
ZHANGJian-guang, DIBao, LIYing-li, CHENShao-chun, LIUYu-fang. Effect of Fruit Bags on Oxidative Stress of Fruit Peel Tissue in Apples[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.7668/hbnxb.2007.S1.023.