Effect of Surface Wax Structure and Its Removal on Storage Properties on Plum Fruits
[Objective]Wax is an important defensive and protective layer on the surface of plants.The study aimed to explore the differences in surface wax structure of different plum varieties and the influence of wax retention or removal on fruit storage property.[Method]In this study,plum'Furongli'and'Younai',which are mainly cultivated in Fujian,were selected as experimental materials.The differences in surface wax structure of mature fruits were observed by scanning electron microscopy.Two storage temperatures of 4 ℃ and 25 ℃ were set up to test the effects of wax retention and removal on the storage properties.[Result]The results showed that the wax structures of the two plum varieties were dominated by vertical flaky crystals and granular crystals.The vertical flaky crystals in'Furongli'were thicker,while the structures of'Younai'had more regular edges of vertical flaky crystals,and closer arrangement of granular crystals.When'Furongli'and'Younai were stored at 4 ℃ for 35 d,and at 25 ℃ for 12 d and 21 d,respectively,the wax removal treatment had significant effect on decay rate,weight loss rate,firmness,soluble solids content and titratable acid content of fruit flesh.The wax removal treatment accelerated the increase of decay rate and weight loss rate and the decrease of firmness,and the change amplitude was greater in'Furongli',and the performance was more significant at 25 ℃ storage.The wax removal treatment reduced the increase rate of soluble solids content of'Furongli'in the middle and later periods,but increased the decrease rate of titratable acid content.In the middle and later storage periods at 4 ℃,the soluble solids content of'Younai'with wax removal treatment was also lower than that with the wax retention,while the titratable acid content was higher than that with the wax retention,expect for the 35th day.[Conclusion]Wax helps to maintain the quality and storage property of plum fruits,and the differences in wax structure of varieties had an effect on their storage.These findings provide references for the storage and preservation techniques of plums.
万方数据
维普
