ibclogo XVI International Botanical Congess


Abstract Number: 2969
Poster No. = 1678


ULTRASTRUCTURE OF THREE-LAYERED REGION IN LEAF OF CARNIVOROUS PLANT ALDROVANDA VESICULOSA


Alexandra N. Ivanova, Komarov Botanical Institute, Rusia


Cells of upper (UE) and lower (LE) epidermis and middle layer (ML) are roughly rectangular in cross section and strongly elongated in longtitudinal section. There are some intercellular spaces between cell layers. Outer periclinal walls in UE cells are twice thicker than that in LE. Numerous plasmodesmata between cells in each layer grouped in pit-fields. Symplastic connection of cell layers occurs through bundle sheath cells and vessel. Periplasmic area of LE contains not only vesicles usual to UE and ML but also concentric twisted membranes. Cytoplasm form a thin layer between the wall and large vacuoles. Dilated cisternae of rough endoplasmic reticulum witn fine fibrillar contence should to be proteins, were found in epidermal cells. Vacuoles in UE and LE contain polyphenolic inclusions in contrast to transparent vacuoles in ML.


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