Author’s Last & First Name:: BABA MAIYA PRADHAN & DEVENDRA M. BAJRACHARYA
Article Abstract: Dendrobium Swartz is one of the largest and most problematic genera of the tribe Dendrobieae in the family Orchidaceae. Nepal harbors about 31 species of Dendrobium.
Micromorphological characters like the stomatal complex in fifteen species of Dendrobium Swartz (Orchidaceae) of Nepal were studied for understanding the taxonomic significance of the stomatal complex within the genus.
For the study of the stomatal complex of the leaf, Carpenter’s method was followed. Stomatal index and stomatal frequency were calculated using formula given by Salisbury. The terminologies used for the stomatal complex type were following those of Patel.
In all the species the leaf surface was found hypostomatic. Tetracytic (a-tetra-monocyclic, b-tetra-monocyclic and c-tetra-monocyclic) and eupara twi-monocyclic with hexa-monocyclic types of stomata were recorded in the genus.
The tetracytic type was found in fourteen species and the eupara twi-monocyclic with hexa-monocyclic type was found in only one species. The elliptical shape of the stomata was found in more species than the circular shape. The epidermal cells of the leaf were rectangular, square, polygonal to irregular.
The distribution of stomata on the leaf surface, the type of stomata and the shape of epidermal cells were taxonomically significant. These characters could be used as distinguishing characters to delimit the species in the genus.
Key words: Anatomical key, Dendrobium, epidermal cells, micromorphological character, stomatal variation
Name of Source (journal/magazine/book)::
Journal of natural History Museum, Tribhuvan University, NEPAL
Date of Publication: Vol. 30 – 2016-2018