Effect of riboflavin on postharvest disease of Asia pear and the possible mechanisms involved
Effect of riboflavin on postharvest disease of Asia pear and the possible mechanisms involved
复制标题
核黄素对亚洲梨采后病害的影响及其可能机制
DOI：
10.1007/s12600-011-0216-y
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发表时间：
2012-07-01
期刊：
影响因子：
1.4
通讯作者：
Wang, Di
中科院分区：
文献类型：
--
作者：
Li, Yongcai;Yin, Yan;Wang, Di
研究了核黄素（维生素B2）对采后早酥梨果实赤星病的防治效果及其可能的作用机制。1.0 mM核黄素能有效抑制链格孢菌腐烂病的发生，提高苯丙氨酸解氨酶（PAL）、多酚氧化酶（PPO）和过氧化物酶（POD）等防御相关酶的活性，增加黄酮类化合物、酚类化合物和木质素的积累。核黄素还通过增加O2-产生量和H2 O2含量，提高过氧化氢酶（CAT）和超氧化物歧化酶（SOD）等主要解毒酶的活性，影响梨果实的活性氧代谢。孢子萌发和菌丝生长。核黄素对烟草赤星病菌的生长有抑制作用，且抑制作用与核黄素浓度密切相关。核黄素对梨黑斑病的抑制作用可能与其对病原菌的直接抑菌作用和引起果实的生化防御反应有关。
The effects of riboflavin (vitamin B2) against Alternaria rot caused byAlternaria alternataand its possible mechanism in harvested Zaosu pear fruit were investigated. Riboflavin at a concentration of 1.0 mM effectively inhibited development of Alternaria rot and enhanced the activities of defense-related enzymes, such as phenylalanine ammonia-lyase (PAL), polyphenoloxidase (PPO) and peroxidase (POD), and increased accumulation of flavonoids, phenolics and lignin. Riboflavin also affected reactive oxygen metabolism of pear fruit by increasing O2–production and H2O2content, and enhancing the activities of the main detoxifying enzymes, such as catalase (CAT) and superoxide dismutase (SOD). Spore germination and mycelial growth ofA. alternatawere inhibited by riboflavin and the inhibitory effect was highly correlated with the riboflavin concentration used in this study. It is suggested that the effects of riboflavin on Alternaria rot in pear fruit may be associated with its direct fungitoxic property against the pathogens, and the elicitation of biochemical defense responses in the fruit.