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苹果为什么会变红
更新时间: 2020-06-30 00:00:00  

苹果变红原因:苹果变红是由于细胞内的花青素的作用的结果。花青素为一种水溶性的植物色素。从广义上看,属于黄酮类化合物,存在于液泡内的细胞液中。花青素的颜色因酸碱度不同而异,在酸性条件下呈红色,在碱性条件下为蓝色。

关键词: 苹果 为什么

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