PJB-2018-994
Pollen and Seed Morphology of Verbascum L. Taxa (Group D) (Scrophulariaceae) in Turkey
Birol BA?ER
Abstract
In this study, 8 species from Group D of the genus Verbascum, which occur throughout Turkey, were examined with regards to the micromorphology of their seeds and pollen via a scanning electron microscope. The grains of pollen were first non-acetolysed and then studied under light microscope (LM) and scanning electron microscope (SEM). The pollen grains of the species in Group D of Verbascum L. were tricolporate and tricolpate. The shapes of the pollen grains were prolate-spheroidal and their structure was tectate. Furthermore, the ornamantation was reticulate. The species from Group D of Verbascum analysed herein exhibited morphological homogeneity, which suggests that the genus is stenopalynous. Among the Verbascum species studied, the surface of the seed is ridged or alveolate, while the alveoli or ridge density and depth, polygonal cell size, as well as the positioning of the vesicles on the walls that separate the polygonal cells on the surface of the seed appear to be species-specific. These species are invasive exotics in Turkey.
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