南方农业学报2012，Vol.43Issue(10)：1561-1568,8.DOI:10.3969/j.issn.2095-1191.2012.10.1561
荔枝、龙眼采后酶促褐变反应化学机理研究进展
Chemical mechanism advances of enzymatic browning reaction in postharvest lychee and longan fruits
摘要
Abstract
The pericarp tissues of lychee (Litchi chinensis Sonn.) and longan (Dimocarpus longan Lour.) turns brown easily immediately after harvesting, which greatly affects the storage and commercial values of two fruits. The postharvest browning of lychee and longan fruits was mainly due to the enzyme梒atalyzed oxidation of polyphenol oxidasc (PPO) and phenolic substrates in pericarp cells. Basing off of recent relevant researches, this paper comprehensively reviewed the enzymatic browning mechanism, composition, and chemical structure identification of enzymatic browning substrates , effects of storage, and transportation conditions, on substrate properties and changes in substrate contents during storage. It was discovered that except for anthocyanin, the properties of other phenols browning substrates in pericarp of lychee and longan were seldom reported; hence, the types and chemical structure identification of enzymatic browning substrates, effects of environmental factors on changes in PPO substrates and enzyme activity, relationship between environmental factors, differences in browning process in different varieties, and changes in PPO substrates content during storage and transportation still need to be lurther studied in order to provide bases for controlling pericarp enzymatic browning during storage and transportation of postharvest lychee and longan.关键词
荔枝/龙眼/多酚氧化酶/酚类底物/酶促褐变机理Key words
lychee / longan/ polyphenol oxidase/ phenolic substrates/ enzymatic browning mechanism分类
农业科技引用本文复制引用
孙健,李丽,游向荣,李昌宝,李志春,何雪梅..荔枝、龙眼采后酶促褐变反应化学机理研究进展[J].南方农业学报,2012,43(10):1561-1568,8.基金项目
国家自然科学基金项目(31000927,31160407) （31000927,31160407）
广西科学研究与技术开发计划项目(桂科攻10100009-2) （桂科攻10100009-2）
广西自然科学基金项目(2010GXNSFC013010,2011GXNSFB018049) （2010GXNSFC013010,2011GXNSFB018049）
广西农业科学院基本科研业务专项项目(桂农科2012YZ08,桂农科2011Y24) （桂农科2012YZ08,桂农科2011Y24）
