IDENTIFICATION OF Dendrobium Sw. BASED ON STOMATA ANATOMICAL CHARACTERS IN LIWA BOTANICAL GARDEN
. MAHFUT *
Department of Biology, Faculty of Mathematics and Natural Science, Universitas Lampung, Jl. Prof. Soemantri Brojonegoro 1, Lampung, Indonesia.
SRI WAHYUNINGSIH
Department of Biology, Faculty of Mathematics and Natural Science, Universitas Lampung, Jl. Prof. Soemantri Brojonegoro 1, Lampung, Indonesia.
TUNDJUNG TRIPENI HANDAYANI
Department of Biology, Faculty of Mathematics and Natural Science, Universitas Lampung, Jl. Prof. Soemantri Brojonegoro 1, Lampung, Indonesia.
. SUKIMIN
Liwa Botanical Garden, Way Mengaku, Balik Bukit, Lampung Barat, Lampung, Indonesia.
*Author to whom correspondence should be addressed.
Abstract
Orchids are ornamental plants in the superior collection of Liwa Botanical Garden, West Lampung. One of the largest types of orchids is the members of the genus Dendrobium. However, until now, many collections have not been identified. This study aims to determine the identification of Dendrobium based on the anatomical characters of leaf stomata in Liwa Botanical Garden. Four Dendrobium accessions were collected, namely CAT140, CAT 144, CAT 274, and IR015. The results of the observation of nine anatomical characters on the upper and lower surfaces of the leaves indicate that the leaf organs have high variations. Accessions IR015, CAT 140, and CAT 274 have stomata only on the lower surface, while CAT 144 has stomata on the upper and lower surfaces. This difference is due to the position of the leaves attached to the stem. CAT 144 forming an angle of 45°C, while the others open horizontally. In case of IR015, CAT 140, and CAT 274, the upper surface of the leaves is only composed of epidermis which is composed of cells which are irregular and pentagonal in shape. The highest number was in CAT 274 because the epidermal cells was smaller than IR015 and CAT 144. The types of stomata in all types were the same, namely tetracytic in the form of stomata surrounded by 4 neighboring cells. The stomata are kidney-shaped and the epidermal cells is irregular, pentagonal, and hexagonal in shape. The results of this study are expected to provide basic information in identifying natural orchids and conservation efforts in Liwa Botanical Garden.
Keywords: Orchid identification, anatomical identification, stomata, dendrobium, liwa botanical garden
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