【作者】 马海军；

【导师】 饶景萍；

【作者基本信息】 西北农林科技大学 ， 果树学， 2007， 硕士

【摘要】 本试验以陕西省子长县大果水晶梨(Suisho)为试材,于盛花期后165d采收,系统研究了不同贮藏温度下大果水晶梨果实的品质及生理变化和该果合适的贮藏包装材料;同时以砀山酥梨为对照,对大果水晶梨的贮藏特性进行了研究,以期为大果水晶梨采后贮藏保鲜技术体系的建立提供参考依据。研究结果表明:(1)大果水晶梨合适的包装材料为0.025mm聚乙烯袋(孔径0.8cm,20孔/袋)。(2)大果水晶梨适宜的冷藏温度为(1士0.5)℃。(3)(1士0.5)℃冷藏抑制了大果水晶梨果实的呼吸作用,延缓呼吸高峰的出现,降低了乙烯释放速率及其峰值;延缓了果实营养成分和叶绿素的降解,从而抑制了果实成熟衰老。而聚乙烯薄膜袋包装果实可有效降低采后大果水晶梨果实的蒸腾作用,减少水分损失,两者结合可有效地达到延缓果实的成熟衰老。此外(1士0.5)℃冷藏明显抑制了淀粉酶和果胶酶的活性。(4)大果水晶梨采后Vc、可滴定酸含量逐渐降低;可溶性固形物含量前期升高,后期降低;MDA含量和细胞膜相对透性逐渐上升;CAT活性贮藏初期上升后期下降,POD活性在贮藏中期有一个活性高峰。(5)大果水晶梨为较耐贮藏的梨品种,但贮藏性明显差于砀山酥梨。更多还原

【Abstract】 In this paper,postharvest physiology of‘Suisho’pear were systematically studied under different storage temperature conditions. The impact of diferent packages were also included in this article.The results showed as follows:1. The appropriate packing material is the 0.025mm polyethylene filmbag with 20 holes. (The hole diameter is 0.8cm)2. The optimum temperature for‘Suisho’pear was(1士0.5)℃.3.The results indicated that (1士0.5)℃delayed fruit ripening and senescence by suppressing respiration,delayed the time of climacteric phase of respiration,reduced the ethylene release speed and peak,inhibited the fruit nutrition ingredient and the degeneration of chlorophyll.The weight-loss rate and moisture rising during storage were reduced markedly by (1士0.5)℃combined with the package of polyethylene bag with holes. The activity of Amylase and PG was apparently inhibited at (1士0.5)℃.4. During storage, Vc and titratable acid content decreased constantly;the contents of soluble solid increased gradually at prophase then decreased during anaphase;Relative permeability and MDA content roses lowly in the earlier stage and rose rapidly in the later time;the activity of CAT enzyme increased at initial stages and decreased during telophase;the activity of POD decreased at the early days then increased constantly.5.The result of statistical analysis indicated that‘Suisho’pear is a variety which has longer storage times.But it is weaker than‘Dangshan’pear in storage characteristic.更多还原