Pollen Morphology of A. glutinosa (L.) Gaertner subsp. glutinosa (Betulaceae)

Abstract

The Betulaceae family includes six genera and these genera are grown naturally in northern hemisphere. The taxa belonging to this family are anemogame. For this reason they produce too much pollen and these pollen have allergic effects. Alnus glutinosa subsp. antitaurica, A. glutinosa subsp. glutinosa, A. glutinosa subsp. barbata, A. orientalis var. orientalis, A. orientalis var. pubescens are the taxa belonging to the genus Alnus growing naturally in Turkey. A. glutinosa are distributed naturally in the Black Sea Region. The pollen of A. glutinosa can cause to pollinosis and allergic symptoms. Determination of palynological features of this taxon will be helpful for aeropalynological, taxonomic and pharmaceutical researches.

Pollen Variability of Alnus glutinosa (L.) Gaerth. (Betulaceae) from Southern Range Edge Populations in Northern Morocco

“…Thus, it appears that variations in the aperture number are independent of pollen size. These results are consistent with those of Shayanmehr et al [38] for the genus Alnus. However, other studies have suggested that the number of apertures is associated with pollen size [48,50,55].…”

“…This form is the most frequently cited in descriptions of pollen grains in Alnus glutinosa [7,33,37]. However, data from A. glutinosa populations in Turkey [38] showed a slight variation with a P/E ratio of 0.79, suggesting a form related to the suboblate type. The oblate form is also found in other Alnus species, including A. viridis, which has a P/E ratio ranging from 0.67 to 0.77 [7].…”

“…For instance, May and Lacoure [41] recommend a minimum sample size of 30 pollen grains, though it is not a universal rule. Among the consulted data, those obtained from A. glutinosa populations from Turkey [38] seem to be the most suitable for establishing a comparison. They were obtained from fresh pollen using the same preparation method as Wodehouse [30] and with the same sample size.…”