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生活在地球士的绿色植物,经过长期的进化形成了植物体与其生活环境相适应,形态结构与其生理功能相适应。例如叶在茎上的排列方式尽管不同,但是相邻两节上的叶总是不重叠,形成了镶嵌排列,这就是叶镶嵌。叶的这种排列方式,能够更多地接受阳光。叶镶嵌与其主要生理功能光合作用相适应。植物的叶通过哪些方式形成镶嵌的呢?下面介绍几种常见的叶镶嵌形式。1.叶柄的伸长如苧麻茎顶部的几片叶,靠近顶端下面的叶柄要比顶端的叶柄长5～10厘米。结果这些叶片的边缘刚好互相镶
The green plants living on Earth scholar, after long-term evolution, form a plant body compatible with their living environment, and their morphological structure is adapted to their physiological functions. For example, the arrangement of leaves on the stems, though different, leaves on two adjacent sections always do not overlap, forming a mosaic arrangement, which is leaf mosaic. Leaves this arrangement, to be able to accept the sun more. Leaf mosaic and its main physiological function of photosynthesis. In what ways do plant leaves form a mosaic? Here are some common forms of leaf mosaic. 1. Petiole elongation Such as ramie stems at the top of a few leaves, near the top of the petiole below the top of the petiole than the length of 5 to 10 cm. As a result, the edges of these blades are just touching each other