Palynological Studies in the Family Plumbaginaceae from Jordan and Iraq PDF

Keywords

pollen grains, Jordan, Iraq

Abstract

Pollen morphological variation of representative species belonging to four polymorphic genera of the family Plumbaginaceae were investigated by using LM , SEM and TEM. Three groups of exine type of pollen grains were observed: finely reticulate , coarsely reticulate and gemmate - echinate. TEM revealed three layers as the exine i.e. tectum , columellae and foot layer, the tectum have additional structures such as spines or perforations. Intine forms a continuous layer. This emphasizes that pollen polymorphism is associated with other floral variable characteristics.