不同株型玉米叶片形态结构的研究

紧凑型玉米与平展型玉米叶片形态结构有一定差别。主要表现在紧凑型玉米叶表皮气孔数目多于平展型。上表皮多17.0%，下表皮多11.5%。紧凑型玉米叶片上、下表皮气孔密度差别比平展型小。紧凑型玉米下表皮比上表皮气孔多44%，而平展型多50%。两种株型玉米叶片维管束鞘中的叶绿体均位于细胞外方，呈半圆形排列。紧凑型玉米比平展型玉米叶片维管束鞘中叶绿体含量较多。两种株型玉米叶片中脉有一定差异，紧凑型玉米叶片中脉较宽且向叶正面凹陷较深。

Study on Leaf Morphological Structure of Maize with Different Types

There is some difference in the structure of leaves between compact-typeand flat-type in maize which mainly shows that the number of stomata in the leaves ofcompact-type is more than that of flat-type. The mumber of stomata on the abaxial epidermis of compact-type is 17.0% higher than that of flat-type,and on the adaxial epidermis is 11.5% higher.The difference of density of stomata on abaxial and adaxial epidermis of compact-type is 44% higher than that of adaxial empidermis,and that of flat-type is 50% higher.Chloroplasts in the leaf boundle sheath of the two types are all situated in outer part of the cells,and arrange in semicircle,its content of compact-type is higherthan that of flat-type.There is also some difference of medial vein between the two types,and the medial vein of compact-type is wider and hollower than that of flat--type.