Özet:

No previous detailed botanical study exist on Rhododendron smirnovii Trauvt., which is endemic in Turkey. The aim of this study was to provide information on the anatomical properties of the leaf and stem of R.smirnovii. Anatomical studies include cross sections of the leaf and stem with illustrations. In addition, phytochemical screening methods were applied for identifing the major chemical groups in this species. The antibacterial activities of the leaf and stem extract of R.smirnovii were also investigated for three Gram (+) (Enterococcus faecalis, Staphylocccus aureus and Staphylocccus epidermidis) and two Gram (-) (Escherichia coli, Pseudomonas aeruginosa) bacteria by employing both microdilution and disc diffusion method. Subsequently, inhibitory activity against yeast-like fungi (Candida albicans, Candida krusei, Candida glabrata and Candida parapsilosis) was also determined. Anatomical features of the plant were described. Flavonoids, tannins and reducing sugars were detected in the leaf and stem of the plant. It was found that methanol extract of the leaf inhibited growth of the microorganisms at different level. The leaf extract posses more antibacterial activity than antifungal activity. The stem methanol extract of R.smirnovii did not show any antimicrobial activity against the bacteria and the fungi investigated in this study.

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