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首页> 外文期刊>Phytochemistry >Formation of novel flavonoids in apple (Malus x domestica) treated with the 2-oxoglutarate-dependent dioxygenase inhibitor prohexadione-Ca
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Formation of novel flavonoids in apple (Malus x domestica) treated with the 2-oxoglutarate-dependent dioxygenase inhibitor prohexadione-Ca

机译：用2-氧戊二酸酯依赖性双加氧酶抑制剂原己二酮-Ca处理的苹果（Malus x domestica）中新黄酮的形成

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摘要

Novel flavonoids were formed in young leaves of apple (Malus x domestica) after treatment with the dioxygenase inhibitor pro-hexadione-Ca. which is known to reduce the incidence and severity of fire blight caused by Erwinia amylovora and other plant diseases. The compounds were isolated and identified as luteoliflavan, luteoliflavan 5-glucoside, eriodictyol 7-glucoside and 6"-O-trans-p-coumaroyleriodictyol 3'-glucoside. These flavonoids represent a novel biosynthetic pathway in apple leading to the formation of 3-deoxyflavans. Concomitantly, the content of regularly occurring phenylpropanoids is also influenced by prohexadione-Ca with increasing amounts of hydroxycinnamic acids and decreasing flavan-3-ols and flavonols. The altered flavonoid metabolism may be related to the lowered pathogen incidence though the isolated novel flavonoids do not exhibit antibacterial activity.
机译：用双加氧酶抑制剂原己二酮-Ca处理后，新的类黄酮形成在苹果的幼叶中（Malus x domestica）。众所周知，这种方法可以减少由淀粉欧文氏菌和其他植物病害引起的火疫病的发生和严重程度。分离出化合物，鉴定为黄体黄烷，黄体黄烷5-葡糖苷，芥香酚7-葡糖苷和6“ -O-反式-对-香豆香柔女酚3'-葡糖苷。这些类黄酮代表苹果中新的生物合成途径，导致形成3-伴随而来的是，随着己烯二酮-Ca含量的增加，羟基肉桂酸的含量增加，黄烷-3-醇和黄酮醇的含量降低，定期存在的苯丙烷类化合物的含量也受到前六酮-Ca的影响，尽管分离出的新型黄酮类化合物减少了类黄酮的代谢，但可能与病原菌的发生率降低有关。不表现出抗菌活性。

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