三江平原不同生境下漂筏苔草叶片解剖结构的研究

通过石蜡切片制片,对采自三江平原5种生境下漂筏苔草的叶片进行了解剖学观察和研究。结果表明:5种生境下漂筏苔草的叶片具有相同结构,都是由表皮、叶肉和叶脉三部分构成的。但不同水深对叶片的解剖结构产生了一定影响,随着水分的增加,植物叶片的维管束个数和厚度、叶片厚度、导管直径和气腔直径均呈现上升趋势。以上结构变化是植物适应湿生环境的典型特征。

Leaf anatomy of Carex pseudocuraica growing in different environments of Sanjiang Campagna

In the present paper,the anatomical structures of the leaves of Carex pseudocuraica from five different environments in Sanjiang Campagna were studied by means of paraffin section. The results indicate that leaves of C.pseudocuraica from five different environments exist the same structure. They are all made up of epidermis,mesophyll and nervure. But the different deepness of water have influence on the anatomical structure of leaf,the characters are as follows:along with increase of moisture,the number and thickness of vascular bundles,the thickness of leaf,the diameter of vessel and air cavity are also increased. All these structural changes are characters which indicate the adaptability of the plant to plashy environment.