Effect of Vegetation Concrete on the Leaf Epidermis Cell of Two Varieties of Poa pratensis L.

The differences of leaf epidermis of ’Nublue’ and ’Kenblue’,two varieties of Poa pratensis L.under two habitats which were the vegetation concrete,and the rural area soil were studied in this paper.Thus there were four samples totally,four parameters were concerned,which were the length of long cell,the length of short cell,the length/width ratio of gas vent and the numbers of gas vent per field of vision.It showed remarkable difference in the length of long cell,the length of short cell,the length/width ratio of gas vent between each group.As the vegetation concrete was a kind of alkaline environment,it was reaso-nable to conclude that these two varieties had relatively greater plasticity to the alkaline environment.In comparison of gas vent numbers,’Nublue’ showed remarkable difference,which demonstrated that it had a relatively large plasticity to the changes of moisture and gas,while ’Kenblue’ showed little difference which showed its greater adaptability to the changes of moisture and gas.