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为什么叶子会变色呢？

一、叶子变色是因为叶绿素的分解。随着秋季的来临，树木体内储存的营养物质逐渐转移到树干和树根，叶绿素的合成减少，同时，树木对低温适应能力增强，细胞内的葡萄糖浓度升高，导致叶子中其他色素的显露，从而呈现出红、黄、橙等不同的颜色。

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