不同品种哈密瓜果实采后品质与耐冷性关系分析

Postharvest Chiling Injury Performance of Two Varieties of Hami Melons and Changes in Storage Quality

以新疆本地具有代表性的哈密瓜‘西周密25号’和‘伽师瓜’为试验材料,在常温下用清水洗净表面残留的泥土等杂质,自然晾干后放入(3±0.5)℃的冷库贮藏42 d。观察和测定不同品种哈密瓜果实在低温贮藏期间的冷害指数以及各项品质指标,探讨不同品种哈密瓜果实在低温贮藏期间的冷害表现特点及耐冷性的差异。试验结果表明,2个品种哈密瓜果实均能在低温贮藏期间发生冷害症状,其中‘伽师瓜’的冷害较轻,随着贮藏时间的延长,细胞膜透性和丙二醛含量都明显升高,硬度、可溶性固形物、可溶性蛋白含量略微上升,呼吸速率呈现先升高后下降再升高的趋势。综合分析,‘伽师瓜’的耐冷性要优于‘西周密25号’。

Xinjiang Hami melon‘Xizhoumi 25'and‘Gashi melon'were rinsed with water at room temperature to clean the residual soil and other impurities on the surface,dried naturally,and then stored in a cold room at(3±0.5)℃for 42 days.The chilling injury indices and quality indexes of different varieties of Hami melons during low temperature storage were observed and measured to explore the differences in chilling injury performance and cold tolerance of different varieties of Hami melons during low temperature storage.The results of the experiment showed that both varieties of Hami melon fruits were able to suffer from chilling injury during low temperature storage,and the chilling injury was milder in‘Gashi melon'.With the extension of storage time,cell membrane permeability and malondialdehyde content increased significantly,hardness,soluble solids and soluble protein content increased slightly,and respiration rate showed a trend of first increasing,then decreasing and then increasing.In a comprehensive view,the cold tolerance of‘Gashi melon'was better than that of‘Xizhoumi 25'.