Ultrastructurе of epidermal surface in floating and submerged leaves of Trapa natans L.

Abstract

Ultrastructure of epidermal surface of floating and submerged leaves of Trapa natans at vegetative phase was investigated. Heterophylly is character for this plant. The determine differences were established. The presence of stomata on upper epidermis and the presence of high cuticular combs along perimeter at each cell on lower epidermis were typical for floating leaves. Submerged leaves have not stomata, but cuticular combs and pore-like structures were revealed in abaxial surface. The contours of epidermal cells are indistinct because outer cell walls of epidermis are coated by solid cuticle layer.