Leaf is the most sensitive organ in plants, and its morphological structure is most likely to change with different ecological conditions to adapt to the environment. Leaves of different plants have different shapes, sizes and shapes. But as far as a plant is concerned, it is relatively stable and can be used as the basis for plant identification and classification. At the same time, the colors of leaves are also diverse. Generally speaking, the molecular ratio of chlorophyll to carotenoids in normal leaves is about 3: 1, which makes the leaves appear green.
Extended data
It is mentioned in junior high school biology textbooks that leaves have the function of converting light energy into chemical energy and inorganic carbon dioxide into organic nutrients because they contain chloroplasts. Simply put, leaves are workshops that make nutrients for plants. From the perspective of vegetative organs, leaves can grow into anything as long as they can produce nutrition, but from the perspective of the whole plant, the growth of leaves must be in line with the maximization of the interests of the whole plant.
When designing leaves, plants must consider three important factors, namely, the quality of materials needed to make leaves, the life of leaves and the efficiency of absorbing and transforming sunlight. Because different plants have different physiological characteristics and live in different environments, these three factors are different. These three factors are reflected in a specific leaf, that is, each leaf has its own unique shape, more specifically, each leaf has its own unique vein structure.