热带作物学报2012，Vol.33Issue(7)：1261-1266,6.DOI:10.3969/j.issn.1000-2561.2012.07.022
不同荔枝品种采后果皮褐变与多酚氧化酶关系的研究
Relation between Polyphenol Oxidase and Postharvest Pericarp Browning in Different Litchi Cultivars
摘要
Abstract
The relationship between pericarp browning and polyphenol oxidase (PPO) activity among postharvest fruits of ' Feizixiao', ' Ziniangxi' and ' Wuhe', with different storability, were investigated in this paper. The results indicated that ' Ziniangxi' was the strongest storability cultivar and ' Feizixiao' followed. During postharvest storage, PPO activity increased firstly and then decreased in pericarp of ' Feizixiao' and ' Ziniangxi' no matter which treatment conducted, while adverse trend at low temperature in pericarp of 'Wuhe', of which PPO activity showed a decreasing trend at room temperature. During the early stage of postharvest storage, ' Wuhe' and 'Ziniangxi' showed the highest and lowest PPO activity of free form, bound form and total enzyme, respectively. On the first day of postharvest fruits, there were four, three and two PPO bands of isoenzymes in pericarp of ' Wuhe', ' Feizixiao' and ' Ziniangxi', respectively. No effect was found on different treatments and numbers of isoenzymes in pericarp of ' Feizixiao' and ' Ziniangxi', however, the numbers of PPO isoenzyme declined in pericarp of 'Wuhe' at low temperature. The results suggested that PPO and numbers of isoenzyme may contribute to the difference of postharvest browning process at early storage stage in pericarp.关键词
荔枝/褐变/多酚氧化酶/同工酶Key words
Litchi (Litchi Chinensis Sonn.)/ Pericarp browning/ Polyphenol oxidase/ Isoenzyme分类
农业科技引用本文复制引用
陈瑞琴,刘保华,王果,王凌云,张新春,李焕苓,王家保..不同荔枝品种采后果皮褐变与多酚氧化酶关系的研究[J].热带作物学报,2012,33(7):1261-1266,6.基金项目
国家现代农业产业技术体系专项(No.nycytx-32-6) （No.nycytx-32-6）
国家自然科学基金(No.30960233). （No.30960233）
