采前钙处理对黄金梨果顶硬化果实贮藏特性及PpEXPA2基因表达的影响

发布时间：2019-06-18 19:54

【摘要】：为探究采前钙处理对黄金梨果顶硬化果实的影响,以黄金梨正常果实和果顶硬化果实为试材,对部分果顶硬化果实进行采前喷钙处理,分别测定果实的贮藏特性和PpEXPA2基因表达量等指标。结果表明:2℃贮藏期间,正常果实、CaCl2处理果实及果顶硬化果实萼端的硬度、粘性、弹性、内聚性和咀嚼性均呈先升高后降低趋势,CaCl2处理果实萼端及柄端的硬度和咀嚼性均明显低于果顶硬化果实;正常果实失重率最高,其次为CaCl2处理果实;CaCl2处理降低了果顶硬化果实的腐烂率,并抑制了果实的呼吸强度。贮藏180d,CaCl2处理果实的腐烂率和呼吸强度分别较果顶硬化果实降低了18.87%和59.70%;采收初期,PpEXPA2基因在果顶硬化果实中的表达明显高于正常果实和果顶硬化果实,随后下降,而正常果实和CaCl2处理果实中PpEXPA2基因的相对表达量均随贮藏时间逐渐升高,采前CaCl2处理抑制了该基因的表达。
[Abstract]:In order to investigate the effect of preharvest calcium treatment on the fruit top sclerosing fruit of Golden Pear, the normal fruit and fruit top sclerosing fruit of Golden Pear were treated with calcium spray before harvest, and the storage characteristics and PpEXPA2 gene expression of some fruit top sclerosing fruits were measured respectively. The results showed that during storage at 2 鈩，

本文编号：2501746