Palynological analysis some species of Chenopodiaceae and its systematic implications using scanning electron microscopy

Chenopodiaceae is a large, diverse and cosmopolitan family within the order Carophyllales. The majority of species are adapted to saline, hypersaline, xerophytic xerohalophytic communities or ruderal habitats. stenopolinous pollen grains monad exclusively polypantoporate with tiny spinules on both tectum operculum. Pollen morphology six genera (Seidlitzia, Atriplex, Bassia, Salsola, Krascheninnikovia Spinacia) have been studied in details. These plant were collected from different phytogeographical regions Iran. palynological investigation was done using scanning electron microscopy (SEM) techniques. characters this study include pore diameters, number density apertures, interporal distance (chord), chord/pollen diameter ratio, diameter/pollen ratio as well spinule We used multivariate statistical methods reveal relationships. Ward clustering analyses check out relationship among species. shapes radially symmetrical, isopolar, pantopolyporate spheroidal. Their exine structure similar. In Chenopodiaceae, three types defined, mainly basis grain size, number, microechinae membrane, spinules, edge shape.