论文部分内容阅读
绿色植物的光合作用主要是在绿色叶片中进行的。但究竟在绿叶中的哪一部分进行?试验证明,叶绿体是进行光合作用的场所,光合作用的光反应是在叶绿体中的基粒上进行的。而暗反应则在叶绿体的间质内进行。因此,可以肯定,叶绿体是进行光合作用的特殊细胞器。 (一)叶绿体的形态和构造叶绿体主要存在于叶肉细胞及幼茎的皮层细胞中,叶绿体呈扁平的椭圆形或球形。它的平均直径约为4—6微米,厚约2—3微米。不同植物每一个细胞中的叶绿体个数不完全一样。有人估计,每平方毫米的蓖麻叶子中叶绿体数目达10万个。叶绿体的含水量为75％左右,叶绿体含有色素、蛋白质、脂类等。叶绿体在细胞质中可
Photosynthesis of green plants is mainly carried out in green leaves. However, what part of the green leaf is actually carried out? The experiment shows that the chloroplast is the place where photosynthesis takes place. The photosynthesis photosynthesis is carried out on the grana in the chloroplast. The dark reaction is carried out in the chloroplast stroma. Therefore, it is certain that chloroplasts are special organelles for photosynthesis. (A) the morphology and structure of chloroplasts Chloroplasts are mainly present in the mesophyll cells and young stem cortex cells, chloroplasts were flat oval or spherical. Its average diameter is about 4-6 microns and about 2-3 microns thick. The number of chloroplasts per cell in different plants is not exactly the same. It is estimated that the number of chloroplasts in castor leaves per square millimeter is 100,000. Chloroplast water content of about 75%, chloroplasts contain pigments, proteins, lipids and so on. Chloroplasts can be in the cytoplasm