Abstract: By using paraffin cut section method, the anatomical characters of Carex Lasiocarpa leaves collected from different habitats in Sanjiang Plain were observed under microscope, and the thickness of silica layer, diameter of conduit, and thickness of ensheathing cell were measured. The C. Lasiocarpa leaves collected from different habitats had the same anatomical structure,i.e., all composed of epidermis, mesophyll, and vascular bundle. The waterlogged depth in the environment had definite effects on the leaf anatomical structure. The thickness of silica layer and of ensheathing cell had definite negative correlation with waterlogged depth, and the diameter of conduit was significantly negatively correlated with the waterlogged depth.

Key words: Molecular cultivation science, Rice, Developmental genetics, Molecular ecology