多花黄精提取物对金冠苹果采后腐烂和品质的影响

Effect of Polygenetic cyrtonema extract on preservation of postharvest ‘Golden Delicious' apples

研究多花黄精提取物对金冠苹果防腐保鲜的效果,测定其对果实的腐烂率、失水率、可滴定酸含量、Vc含量、可溶性糖含量、过氧化物酶(peroxidase,POD)活性以及丙二醛含量等生理生化指标的影响。结果表明,质量浓度为12.5 g·L-1的多花黄精提取物对供试苹果进行浸泡处理,(24.0±2.0)℃条件下贮藏21 d后,果实的腐烂率比对照组降低了33.3%,可滴定酸、可溶性糖和Vc含量分别为0.190%、109.6 mg·g-1和3.7 mg·100 g-1,比对照组分别提高了4.4%、22.7%和105.6%;果实中丙二醛含量(MDA)的积累显著降低,并保持较高的POD活性,保鲜效果较佳。

To determine the effect of Polygenetic cyrtonema extract on preservation of apple fruits during the postharvest period, fruits of ＇Golden Delicious＇ were submerged in the 12.5 g·L^-1 Polygenetic cyrtonema extract so- lution. After the treated fruits were stored at （24.0±2.0）℃ for 21 days, the fruit decay rate and weight loss, the con- tents of titratable acids, vitamin C, soluble sugar, and MDA and POD activity in the fruits were investigated. The results indicated that Polygenetic cyrtonema extract at 12.5 g＇L＂1 decreased the fruit decay rate by 33,3%. The con- tents of titratable acids, soluble sugar, and vitamin C in the treated fruits were 0.190%, 109.6 mg·g^-1, and 3.7 mg·100g^-1, respectively, with an increase of 4.4%, 22.7%, and 105.6%, respectively, compared to that of the control group. Meanwhile, Polygenetic cyrtonema extract at 12.5 g·L^-1 could decrease the MDA accumulation and keep rela- tively high activity of POD in the fruits, indicating a good effect on preservation ofpostharvest apple fruits.