NO和ClO_2处理对伽师瓜采后细胞壁软化酶的影响

Effects of nitric oxide and chlorine dioxide treatments on the cell wall softening related enzymes of Jiashi melon fruit during storage

以伽师瓜为试材,研究了一氧化氮(NO)和二氧化氯(Cl O2)处理对采后伽师瓜细胞壁软化酶的影响。结果表明,NO和Cl O2处理对伽师瓜贮藏前期可溶性糖含量的变化无显著影响,但能延缓Vc含量的降低,抑制多聚半乳糖醛酸酶(PG)、果胶甲酯酶(PME)、果胶裂解酶(PL)、纤维素酶(Cx)、β-半乳糖苷酶和木聚糖酶的活性,延缓了果实的软化。

Effects of nitric oxide （NO） and chlorine dioxide （ClO2 ） on the cell wall softening related enzymes of postharvest Jiashi melon fruit were investigated. Jiashi melon harvested at commercial stage were treated with NO and CIO2, and then stored at 4 % for 82 days. The results showed that NO and ClO2 treatments had no significant effect on the soluble sugar contents, but reduced the degradation of Vc. The activities of polygalacturonase （PG）, pectin methyl esterase （PME）, pectate lyase （PL）, cellulose （Cx）,β- galactosidase, and xylanase were inhibited by NO and ClO2 treatments.