枇杷果实采后膜透性、呼吸强度及乙烯产生变化与耐贮性的关系

A Study on the Relationship Between the Changes of Postharvest Membrane Permeability, Respiration Rate, and Ethylene Production and the Storability of Loquat Fruit

对浙江余杭塘栖主栽的３个枇杷品种（大红袍，夹脚和白砂）果实采后膜透性、呼吸强度、乙烯产生及果实的耐贮性作了初步研究。结果表明，枇杷果实采后膜透性逐渐增加，但不同品种增加的速度不同，以大红袍果实最快，夹脚次之，白砂最慢。不同品种果实采后呼吸强度及乙烯产生都是逐渐不降的，但在数量上存在明显差异，以大红袍的呼吸强度和乙烯产生最高，夹脚的次之，白砂的最低。果实贮藏期间腐烂发生的大小程度依次为大红袍、夹脚和白砂，因此耐贮性大小依次为白砂，夹脚和大红袍。这些结果表明，枇杷采后膜透性，呼吸强度和乙烯产生的高低与果实衰老和腐烂变质密切相关，可作为衡量不同品种耐贮性大小的重要生理指标。

Three varieties (Baisa, Jiajiao and Dahongpao) of loquat fruit cultivated largely at Tangxi, Yuhang County, Zhejiang Province were used in this study. The results showed that the storability of loquat fruit was closely related to the changes of postharvest membrane permeability, respiration rate, and ethylene production. The faster the increasing rate of the membrane permeability with time, the worse the storability. There were marked differences among the three varieties as regards the magnitude of their respiration rate and ethylene production. The higher the respiration rate and ethylene production, the worse the storability. The storability of Baisa was the best and that of Jiajiao and Dahongpao was the second and third, respectively.