Identification of Three Yeast Strains and Preliminary Study on Their Application in Postharvest Preservation of Fruits
Three strains of yeast XRL-1,XRL-2 and XRL-3 isolated from pear,plum and grape fruits in Xianrenling,Fenggang County,Guizhou Province,were identified by morphology,physiology,biochemistry and molecular characteristics,and their effects on posthar-vest preservation for fruits were studied.The results showed that:XRL-1,XRL-2 and XRL-3 are Wickerhamomyces anomalus,Sac-charomyces cerevisiae and Hanseniaspora uvarum respectively.The fruit post-harvest preservation test showed that XRL-1,XRL-2 or XRL-3 had no significant difference compared with the control group for jujube and grape in the first week(p>0.05),but the difference was significant in the second week(p<0.05).The fruit preservation experiment showed that there was no significant difference in the post-harvest preservation effect of XRL-1,XRL-2,and XRL-3 on jujube and extract in the first week(p>0.05),but there was a significant difference in the second week(p<0.05).As for the post-harvest preservation effect of jujube,there was a significant difference between XRL-1,XRL-2,and XRL-3 and the control group,as well as among XRL-1,XRL-2,and XRL-3.In terms of the preservation effect of post-harvest grapes,there was a significant difference(p<0.05)between XRL-1 and the control group and XRL-3,and three strains of yeast did not show significant differences in post-harvest preservation of peaches in either the first or second week.Among the three yeast strains,XRL-1(abnormal Wickham yeast)has the best post-harvest preservation effect on jujube and grape.