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有哪些树秋天会变黄

更新时间: 2020-11-12 00:00:00     

榆树,桑树,梧桐树,槭、枫树,槐树等很多树到了秋天叶子都要变黄

植物叶肉细胞中主要含有有三种色素:

叶绿素、叶黄素和胡萝卜素,这三种色素的合成与温度有关。秋天温度下降时胡萝卜素的分泌增多,而胡萝卜素是橙色的,所以树叶会变黄或者变红。

关键词: 哪些 秋天

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