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Foliar epidermal micromorphology of selected Achillea species (Asteraceae) from Iran | ||
| Taxonomy and Biosystematics | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 20 آبان 1405 | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22108/tbj.2026.150236.1345 | ||
| نویسندگان | ||
| Azadeh Akhavan Roofigar* 1؛ Shabnam Abbasi2 | ||
| 1Isfahan Province Agricultural Research Center, Isfahan, Iran | ||
| 2Department of Biology Education, Farhangian University, P.O. Box 14665-889, Tehran, Iran | ||
| چکیده | ||
| Foliar epidermal characters were examined in 28 herbarium specimens representing 12 Achillea species from Iran to assess their value for species identification. The abaxial leaf epidermis was studied using light microscopy and scanning electron microscopy. Epidermal cell shape, anticlinal wall pattern, stomatal type, stomatal dimensions, and stomatal index were recorded. Most species had irregular epidermal cells with sinuous anticlinal walls. Achillea filipendulina had polygonal cells with straight to slightly curved walls, A. setacea had elongated to polygonal cells with a similar wall pattern, and A. vermicularis had elongated to irregular cells with straight to weakly undulate walls. Two stomatal types were recorded. Anomocytic stomata occurred in eight species, whereas paracytic stomata were observed in A. kellalensis, A. millefolium, A. nobilis, and A. setacea. Mean stomatal length ranged from 20.03 µm in A. kellalensis to 34.69 µm in A. tenuifolia, while mean stomatal width ranged from 15.60 to 30.32 µm in the same species. Stomatal index ranged from 7.69% in A. aleppica to 23.07% in A. nobilis. Principal coordinates analysis of the qualitative and quantitative epidermal characters summarized the main pattern of variation among the examined species, with the first three axes accounting for 60.55% of the corrected inertia. The observed character combinations were useful for characterizing some species, although considerable overlap occurred among the examined taxa. Foliar epidermal characters therefore provide useful supplementary evidence for the identification of Achillea species but should be used in combination with other taxonomic characters. | ||
| کلیدواژه‌ها | ||
| anticlinal walls؛ epidermal cells؛ light microscopy؛ scanning electron microscopy؛ stomatal index؛ taxonomy | ||
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