Studies on the molecular mechanism of long-term storage potential of cultivar 'Fuji'.

点击翻译按钮获取中文摘要

The characteristics of flesh softening during ripening process are greatly difference among apple cultivars. 'Fuji', leading cultivar in the world, doesn't show any detectable firmness-loss even under storage of room temperature at least one month, while 'Golden Delicious' starts the softening soon after harvesting. To elucidate the mechanism by which the distinction of softening pattern among cultivars accounts, four ripening related genes (MdACS1, MdACO1, MdPG1, MdExp3) were analyzed in 14 cultivars which represent the firmness-loss pattern of either 'Fuji' or 'Golden Delicious'. All the cultivars showing the character maintaining the firmness revealed weak or transient expression of MdPG1 irrespective of ethylene production rate and transcription levels of other genes. These results suggest that different softening behaviors during ripening among apple cultivars may be caused by distinctive expression patterns of MdPG1 gene.