磷脂酶D抑制剂处理对采后龙眼果实贮藏性质的影响

目的]研究不同磷脂酶D（PLD）抑制剂处理对采后龙眼果实贮藏性质的影响，为龙眼保鲜新方法的开发应用提供理论依据。方法]以采后“石硖”龙眼果实为试验材料，分别用25mg／kg的PLD抑制剂正丁醇、仲丁醇、溶血磷脂酰乙醇胺、2，3-二磷酸甘油酸、Wortmannin、沙丁胺醇、色甘酸钠进行处理，分析在常温（25±0．5）oC贮藏过程中龙眼果实的品质变化。结果]仲丁醇处理后的龙眼果实褐变指数及自溶指数上升慢于对照果，可溶性固形物含量高于对照果，果实失重率低于对照果；与其他抑制剂处理果和对照果相比，较好地保持了龙眼果实采后品质。结论]PLD抑制剂仲丁醇处理能有效减缓贮藏过程中龙眼果实的品质劣变，具有一定的保鲜效果。

Effects of PLD inhibitors on storage properties of postharvest longan fruits

Objective ]The effects of phospholipase D （PLD） inhibitors on storage properties of postharvest longan fruits were studied in order to provide theoretical references for developing new longan preservatives. Method]Longan fruits （cv. ＂Shixia＂） were treated by 25 mg/kg PLD inhibitors n-butanol, sec-butanol, lysophosphatidylethanolamine, 2,3-bis-phosphoglycerate, Wortmannin, salbutamol, and sodium cromoglycate, respectively. The postharvest properties of these longan fruits were analyzed during storage at （25±0.5）℃. Result]The results showed that the fruits treated with sec-butanol had lower pericarp browning and pulp autolysis, higher soluble solid content,and less fruit weight loss com- paring with control. Compared with other PLD inhibitor treatment and the control, sec-butanol treatment could better maintain the fruit quality of longan. Conclusion]PLD inhibitor sec-butanol could effectively postpone quality deterioration of longan fruits during storage.