Changes of Cell Wall and Hydrolases Activity in the Apricot Fruit of Postharvest

Six Xinjiang apricot cultivars: early maturing varieties,medium maturing varieties and later maturing varieties were used as test materials,were stored at(3.0±0.5)℃,the changes of cell wall content,cell wall components content,PG,cellulase,β-glucosidase and hydrolase characteristics were regularily determined during storage time.The results showed:during postharvest storage,cell wall and firmness of 6 apricot varieties decreased,pectinase and cellulase activity increased,which promoted the degradation of the original pectin and cellulose,cellulose,hemicellulose,and covalent binding type fruitgel content decreased,the water-soluble pectin and ionic pectin content of the cell wall were significantly increased,which ultimately led to softening of the fruit.Among the six apricot cultivars,the firmness and cell wall content of the medium maturing variety-Luntaixiaobaixing,were higher than those of other varieties,early maturing varieties Baduyulvke with non-storability,the lowest content of cell wall showed a significant difference(P0.05),further explained the reason why the mid-maturing and late-maturing apricot had storability.