植物初生时,叶子是黄绿色的。长大成“人”后,变为深绿色。到了秋冬季节,便枯黄了。为什么会这样呢?原来,初发育的嫩叶,光合作用能力较弱,合成叶绿素能力也相应较低,而合成黄色的类叶色素的能力稍强,因为类叶色素和绿色的叶绿素相混,所以嫩叶呈黄绿 When a plant is born, the leaves are yellow-green. After growing into a “person”, it becomes dark green. In autumn and winter, it was yellow. Why did this happen? Originally, the newly developed young leaves had weak photosynthetic capacity and a relatively low ability to synthesize chlorophyll, and the ability to synthesize yellow leaf-like pigments was slightly stronger because the leaf-like pigments were mixed with the green chlorophyll. So the green leaves are yellow-green