Effects of Three Ethylene-action Inhibitors on Storage Quality of Actinidia arguta

Effect of treatment with 1-pentylcyclopropene(1-PentCP) and 1-octylcyclopropene(1-OCP),as ethylene action inhibitors,on post-harvest physiology and storage quality of Actinidia arguta was investigated,and the same concentrations of 1-methylecyclopropene(1-MCP) was as control.Fruits were respectively fumigated with 0.4,0.8 or 1.2 μL/L 1-PentCP and 1-OCP at room temperature for 20 h.After fumigation,the treated fruits were packed with 0.02 mm thickness PE fruit bags,and stored at room temperature [(20±1) ℃,RH 85~90%] for ripening evaluation.Respiration intensity,firmness,Vc content,titratable acid content,soluble solids,MDA content,activity of SOD and POD were determined every five days during fruit storage.The results showed that all treatments significantly delayed the appearance of respiratory rate and SOD,POD activity peaks,suppressed fruit softening,decreased titratable acid content and good fruit rate,increased soluble solids content,and inhibited MDA accumulation during storage.Moreover,1.2 μL/L 1-MCP showed the best effect,followed by 0.8 μL/L 1-OCP and 1.2 μL/L 1-PentCP.