TAILIEUCHUNG - Leaf epidermis morphology of some Onosma (Boraginaceae) species from Turkey

The leaf epidermis of 14 Onosma L. species was examined by light and scanning electron microscopy (SEM). The leaf characters studied showed some variations. Morphologic features of the epidermal cells such as shape, structure of the anticlinal walls, stomatal size, outer stomatal rims, peristomatal rims, and apertures were summarised in the examined taxa. | Turkish Journal of Botany Turk J Bot (2013) 37: 55-64 © TÜBİTAK doi: Research Article Leaf epidermis morphology of some Onosma (Boraginaceae) species from Turkey 1, 2 1 Öznur ERGEN AKÇİN *, Gülcan ŞENEL , Yaşar AKÇİN Department of Biology, Faculty of Sciences & Arts, Ordu University, 52750, Ordu, Turkey 2 Department of Biology, Faculty of Sciences & Arts, Ondokuz Mayıs University, Samsun, Turkey 1 Received: Accepted: Published Online: Printed: Abstract: The leaf epidermis of 14 Onosma L. species was examined by light and scanning electron microscopy (SEM). The leaf characters studied showed some variations. Morphologic features of the epidermal cells such as shape, structure of the anticlinal walls, stomatal size, outer stomatal rims, peristomatal rims, and apertures were summarised in the examined taxa. It was found that these characters are variable in the genus but usually they are stable within a species. Epidermal cells of the investigated taxa are polygonal, elongated, or irregular. Anticlinal walls of the epidermal cells are generally straight to curved and repand. Apertures are long, ellipsoidal, and narrow. SEM studies in particular provided some useful information concerning the systematics of Onosma taxa. Key words: Epidermis, Onosma, micromorphology, SEM 1. Introduction Onosma L. is one of the largest genera, with 98 species in the family in Turkey. The endemism rate for the genus in Turkey is 50% (Yıldırımlı, 2000; Riedl et al., 2004; Binzet & Orcan, 2007; Kandemir & Türkmen, 2010; Aytaç & Türkmen, 2011). Metcalfe and Chalk (1979) explained the general characteristic properties of the family Boraginaceae, including some details of the genus Onosma. Karyological (Teppner, 1981, 1988), chemical (Mellidis & Papageorgiou, 1987; Khajuria & Jain, 1993; El-Shazly et al., 2003; Özgen et al., 2004), and micromorphological (Akçin, 2007a) studies .

• Nông nghiệp
• Onosma L
• Leaf epidermis morphology
• Scanning electron microscopy
• Morphologic features
• Epidermal cells
• Peristomatal rims
• Examined taxa
• Onosma beyazoglui Kandemir
• Diagnostic morphological characters
• Genus Onosma
• Onosma beyazoglui
• Pinus nigra
• Diagnostic characters
• Scanning electron microscope
• Onosma malatyana
• O
• gigantea Lam
• Diagnostic morphological
• Light microscopy
• Palynological characters