Abstract: In order to inquiry into the relationship between the chestnuts’ calcification occurrence and the cell wall’s metabolism,the study measured the changes of the incidence,the weight loss rate,the respiratory intensity,the water soluble pectin content,the insoluble pectin content and pectin methylesterases(PE)activity and polygalactouronase(PG) activity of the chestnuts’ calcification under different storage conditions.The results showed that during storing the larger the weightlessness of the chestnut fruit was,the more the water loss was and the higher the calcification occurrence was.The insoluble pectin,pectin methylesterases(PE),water-soluble calcium increases along with calcification degree increasing;the fruits’ weightlessness and the cell wall’s damage was the main cause of the chestnuts’ calcification.

Key words: calcification, chestnut, pectinesterase, polygalacturonase, cell wall