November 2023
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40 Reads
Pollen grains of ten wild and cultivar species were processed and examined microscopically with light and scanning electron microscopes. The results showed that all studied grains by LM had one pore (monoporate) and were very close in shape, their shapes ranged from spheroidal, sub spheroidal to oblate spheroidal in equatorial and polar view except in H. vulgare (Qala2) was ovoidal. H. glaucum recorded the minimum grain size was (25.0-37.5) * (25.0-37.5), and the two cultivated species H. distichon (Garmyian 1) and H. Vulgare (Garmyian 2) recorded the maximum grain sizes were (35.0-60.0)*(32.5-60.0) and (40.0-60.0)*(35.0-57.5) respectively. Three types of surface ornamentations were observed through the SEM microscopy, the examined taxa have been divided into three groups which were microverrucate sculpture (three taxa), microechinate sculpture (four taxa) and microverrucate to microechinate sculpture (three taxa). These traits have been included in a comparison table, supported by figures to compare the variations among the studied taxa grains. KEY WORDS: Hordeum, LM and SEM, Microechinate, Microverrucate, Monoporate, Palenology.