Leaf anatomical study of taxons Salvia nemorosa subsp. tesquicola, Salvia nutans, and Salvia × Sobrogensis [i.e. Salvia × Dobrogensis] from Dobrudja [Romania]
2012
Bercu, R., Ovidius University, Constantza (Romania). Faculty of Natural and Agricultural Sciences, Department of Botany | Negrean, G., Botanical Institute, Bucharest (Romania) | Broască, L., Ovidius University, Constantza (Romania). Faculty of Natural and Agricultural Sciences, Department of Botany
This paper describes aspects of the leaf anatomy of two species of Salvia L.: Salvia nemorosa L. subsp. tesquicola (Klokov et Pobeda.) Soó, Salvia nutans L. and a hybrid of the two plants - Salvia × dobrogensis Negrean. The objective was to highlight common anatomical characteristics and superiority of the hybrid, compared with its parental species. Differences were present in the structure of both the petiole and blade. For the petiole, differences concerned the degree of development of the external (collenchym and chlorenchym) and inner cortex. The vascular system in all species, comprised a great number of vascular bundles, with different levels of development of the conductive tissues. The mesophyll was heterogeneous, bifacial (S. nemorosa subsp. tesquicola and hybrid) and S. nutans ecvifacial. Numerous glandular and non-glandular trichomes (hairs) were present, different in structure, shape and size. Stomata were found on both upper and lower epidermis of the blade and were of the diacytic type, impressing, with an amphistomatic character. The vascular system of the mid-vein of the Salvia species was well developed, in particular those of the hybrid species. The petiole and blade anatomy of the two species of Salvia and their hybrid showed common and specific features indicating that, although the hybrid leaf is more developed anatomically than its parental species, the petiole has many features similar to that of Salvia nutans and the blade is very similar to that of Salvia nemorosa.
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