COMPARATIVE LEAF SURFACES OF ORCHIDACEAE SPECIES FROM THAILAND
Keywords:
Leaf surfaces, Orchidaceae, anatomyAbstract
Leaf surfaces anatomy was investigated in thirteen species, seven genera of Ochidaceae from Thailand. Leaf blade anatomy characteristics were studied using epidermal peeled slides before being observed under light microscope. The results showed the comparable data of leaf anatomical characters among thirteen species of the orchids. Distinct variation in the anatomical characters of the orchids including stomata anomocytic, cyclocytic, paracytic, pentacytic and tetracytic; the presence or absence of secretory cell, grandular trichomes, crystal (druses, long tube, raphides, rectangle and square), shape ofepidermal cell, length of guard cells and density of trichome on adaxial surfaces were presented. Detailed leaf anatomical characters have been used successfully to clarify taxonomic status and important to support species identification. The key to species of Ochidaceae based on leaf surfaces anatomy characters is constructed.
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