油桃后熟衰老期间几个生理指标的变化

以溶质油桃秦光和不溶质油桃阿姆肯为材料 ,研究了果实采后成熟衰老期间呼吸强度、乙烯释放速率、果肉硬度和膜透性变化的特点。结果表明 ,秦光和阿姆肯具有呼吸高峰和乙烯释放高峰 ,是典型的跃变型果实。果实硬度在跃变前快速下降 ,且膜透性的变化早于乙烯释放高峰。阿姆肯采后寿命长于秦光 ,膜透性、果实硬度的变化比秦光缓慢 ,但果实乙烯释放速率显著高于同期的秦光果实。

Changes of Several Physiological Permatances during Nectarine Ripening and Senescence

Changes of respiration rate, ethylene production, fruit firmness and membrane permeability of nectarine after harvest were tested with non melting cultivar "Armking" and melting cultivar "Qinguang". Both cultivars are climacteric fruits with peaks of respiration and ethylene production. Initiation of softening and increase of membrane permeability occured prior to the respiratory climacteric and production of ethylene comparing to "Qinguang" cv., the shelf life of "Armking" was longer, the membrane permeability and firmness changed more slowly while the rates of ethylene production were higher than that of "Qinguang" to some extent.