ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Comparison of fruit storage behaviour in the pear cultivars Yali and Xuehua.

Chen, K. S.; Yu, L.; Zhou, S. T.;

Plant Physiology Communications Year: 1992 Vol: 28 Issue: 6 Pages: 428-430 Ref: 8 ref.

1992

บทคัดย่อ

Yali and Xuehua are outstanding cultivars of Pyrus bretschneideri. Their responses to changes in storage temperature were investigated. The contents of ACC and ethylene in fruits of both cultivars at 20 deg C and at an early stage postharvest were low but as the storage duration increased the contents rose considerably. The ACC contents of Xuehua and Yali reached their maximum after storage for 11 and 14 days, respectively, then decreased, while the respiration peak occurred in both cultivars after storage for 19 days at 20 deg . Both showed climacterics. Yali was sensitive to low temperatures at an early storage stage. When fruits were initially stored at 12 deg with a subsequent 1 deg fall every 2 days down to 0 deg , serious core browning was recorded after storage for 54 days. This also occurred in controls stored directly at 10 deg . When fruits were first stored at 12 deg for one week, with a subsequent 1 deg fall every 3 days down to 0 deg the incidence of core browning was very slight. However, for fruits of Xuehua a gradual drop in temperature had no effect and this cultivar could be placed directly in 10 deg after harvest without damage. The CO2-sensitivity of Yali was higher than that of Xuehua and in Yali the core of fruits was more sensitive than the pulp. After treatment with 5-10% CO2 for 2 weeks, browning occurred in both core and pulp. In contrast, when fruits of Xuehua were treated with <10% CO2 for 2 weeks, the colour and hardness of fruits were unaffected during 134 days of storage. The CO2 sensitivity of pulp was higher than that of the core in Xuehua.