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枫叶为什么会变红

更新时间: 2021-04-02 20:40:53     

1、枫叶到秋天会由绿色变为红色的原因是:枫叶中除叶绿素外,还含有类胡萝卜素(黄色、橙色以及红色)。

2、春、夏季节叶绿素在叶子中的含量比其它色素多,所以叶子呈现绿色。

3、当秋天到来时,白天缩短而夜晚延长,短日照使树木开始落叶。叶片内的叶绿素逐渐解体,其它色素的颜色就在叶面上显现出来,所以枫叶就呈现出红色。

关键词: 枫叶 为什么

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