Postharvest Technology Laboratory, Department of Horticulture, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur, Rajasthan, 313 001, India.
J Sci Food Agric. 2013 Jun;93(8):1940-4. doi: 10.1002/jsfa.5995. Epub 2012 Dec 18.
The effect of storage temperature on physiological responses in Indian jujube (Ziziphus mauritiana Lamk. cv. Gola) fruit was investigated. Freshly harvested fruits at physiological maturity characterised by colour-turning stage were stored at ambient temperature, 12 and 6 °C for 21, 35 and 35 days respectively. Headspace O2, CO2 and C2H4, moisture content, respiration, ethylene production, firmness, tristimulus colour, chroma, hue angle and chilling injury index were monitored during fruit storage.
Rates of respiration and ethylene production increased after 1 week of storage at ambient temperature, while peaks were observed after 2 weeks at 12 and 6 °C. Headspace O2 decreased continuously during storage, while CO2 and C2H4 increased at all storage temperatures. Moisture content and firmness also decreased during storage. Hunter L* values increased during storage, which correlated with the darkening of fruit colour. Fruit stored at ambient temperature did not show any chilling injury symptoms, while chilling injury appeared on day 28 under 12 °C storage and on day 21 under 6 °C storage.
Indian jujube fruit showed high rates of respiration and ethylene production that were significantly affected by different storage temperatures. Lower temperatures increased the shelf life of the fruit, but chilling injury was a problem under 6 °C storage. Indian jujube fruit could be stored at 6 °C for up to 35 days if chilling injury could be alleviated.
本研究调查了贮藏温度对印度蜜枣（Ziziphus mauritiana Lamk. cv. Gola）果实生理反应的影响。将刚达到完熟期（果皮颜色转变）的果实，在环境温度、12℃和 6℃下分别贮藏 21、35 和 35 天。贮藏期间监测果实的顶空 O2、CO2 和 C2H4、水分含量、呼吸作用、乙烯生成、硬度、三刺激值颜色、彩度、色调角和冷害指数。
在环境温度下贮藏 1 周后，呼吸作用和乙烯生成速率增加，而在 12℃和 6℃下贮藏 2 周后达到峰值。贮藏期间顶空 O2 持续下降，而 CO2 和 C2H4 则在所有贮藏温度下增加。水分含量和硬度也随贮藏时间下降。贮藏期间 Hunter L*值增加，这与果实颜色变暗有关。在环境温度下贮藏的果实没有出现冷害症状，而在 12℃贮藏 28 天和 6℃贮藏 21 天后出现冷害症状。
印度蜜枣果实呼吸作用和乙烯生成速率较高，贮藏温度对其有显著影响。低温可以延长果实的货架期，但 6℃贮藏会导致冷害。如果能缓解冷害，印度蜜枣果实可在 6℃下贮藏 35 天。
