PJB-2018-475
MICROMORPHOLOGICAL STUDIES ON VERBASCUM L. TAXA (GROUP D) (SCROPHULARIACEAE) IN TURKEY WITH EMPHASIS ON SEED AND POLLEN MORPHOLOGY
Birol BAŞER
Abstract
In this study, seed and pollen micromorphology in 8 species of genus Verbascum D Group distributed in Turkey were studied using scanning electron microscopy. The pollen grains were acetolysed and observed under Light and Electron microscopes. The pollen grains belonging to the species in Group D of Verbascum L. are tricolporate. The shapes of the pollen grains are prolate-spheroidal and the structure of them is tectate. Furthermore, the ornamantation is reticulate. The species of Verbascum D group analysed here exhibit morphological homogeneity, which suggests that the genus is stenopalynous. The seed surface is ridged or alveolate among the studied species. Depth and density of the alveoli or ridges, size of polygonal cells along with arrangement of vesicles on the walls separating the polygonal cells on the seed surface seem to be species-specific in Verbascum. These species is invasive exotics in Turkey.
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