耐贮性不同桃果实采后软化过程中α-甘露糖苷酶活性变化  

Activity Changes ofα-mannosidase Involved in the Softening Process after Harvesting in Peach Fruits with Different Storage Property

作　　者：罗川[1] 曹丽军[1] 赵彩平[1] 韩明玉[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《西北农业学报》2013年第10期116-119,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金(31101514/C150102)

摘　　要：以较耐贮藏桃品种"秦王"和不耐贮藏桃品种"白丽"为试材,研究采后贮藏期间果实硬度、乙烯释放速率及α-甘露糖苷酶(α-man)活性的变化差异。结果表明,耐贮性较差的"白丽"果实在贮藏的第2天其乙烯释放和α-man活性便出现小高峰,此后在贮藏第4天出现乙烯释放峰值,到贮藏第5天伴随着α-man活性的迅速升高,果实硬度快速下降。耐贮藏的"秦王"果实乙烯释放和α-man活性峰值均出现在贮藏后第5天,然后下降,在贮藏末期又出现第2个峰值。此外,在整个贮藏期间,耐贮性较差的"白丽"果实α-man活性明显高于"秦王",在贮藏后期尤为显著。说明α-man活性高低可能显著影响桃果实的耐贮性。Peach cultivars ＂Qinwang＂ and ＂Baili＂ with different storage properties were used to inves- tigate the changes of fruit firmness, the rate of ethylene release and the activity of α-mannosidase（a man）after harvesting. The results showed that the poor storability fruits of ＂Baili＂ reached the first peak of ethylene release and α-man＇s activity on the second day. The maximum of ethylene release ap- peared on the 4th d. After that the firmness declined rapidly accompany with the fast increase of α- man＇s activity. While in the hardness fruits of ＂Qinwang＂, the maximum of ethylene release and α- man＇s activity appeared on the 5th d, then decreased afterward and to the second peak at the end of storage. In addition, the α-man＇s activity of ＂Baili＂ was higher than ＂Qinwang＂ during the whole sof- tening progress, especially at later stage, which indicated that the activity of α-man may significantly affect the peach fruit storability.

关 键 词：司桃 果实 成熟软化 α-甘露糖苷酶 

分 类 号：S662.1[农业科学—果树学]