Pollen morphology of certain species of the family Lamiaceae in Saudi Arabia

Abstract

The intention of the present wok is to provide an account on the pollen morphological features of Lamiaceae in Saudi Arabia as a basis for future studies of Lamiaceae pollens in the region. Pollen morphology of 20 species belong to 16 genera of the Lamiaceae has been investigated using Light Microscope (LM) and Scanning Electron Microscope (SEM). The study revealed that the pollen grains were characterized by 3-zonocolpate or 6-zonocolpate. Size of the pollen is variable between the genera but not among the species of the same genus. The surface pattern of the exine varies from fine reticulate, rough reticulate, mega-reticulate, reticulate-perforate, bireticulate-perforate or granulate, leading to 6 types of pollen grains. These variations revealed by this study implies that pollen Morphology may be of significant value sharing in solving problems in the classification of Lamiaceae members. A Key to the species, based on the morphological features of pollen grains, is also provided.

Taxonomic study of subfamily Nepetoideae (Lamiaceae) by polynomorphological approach

“…Surface ornamentation of the colpus may also vary considerably for example, gemmate, varrucate, baculate, scabrate, aerolate, and rugulate. These apertural features has been considered useful to define the Nepetoideae (Azzazy, ) and also helpful in the taxonomy of other Lamiaceae taxa as well (Doaigey et al, ; Perveen & Qaiser, ).…”

“…Keeping in view the significance of pollen morphological traits of Lamiaceae has been attracting interest globally (Azzazy, ; Badamtsetseg et al, ; Doaigey, El‐Zaidy, Alfarhan, Milagy, & Jacob, ). The palynological study of Nepetoideae (Lamiaceae) was first time conducted and has not been documented in Pakistan.…”

Microscopic Studies, Phytochemical and Biological Screenings of <i>Ocimum canum</i>

“…Nevertheless, Hubert [16] in a cross-sectional study of O. canum leaves reported the presence of spiral vessels, trichomes and sclerites. Previous studies reported that spheroidal pollen grains were characteristic to certain species of the family Lamiaceae such as Ocimum species [17].…”

Influence of altitudinal variation on the total phenolic and flavonoid content of Acacia and Ziziphus honey

“…In the present study, the identification of plant species for the pollen types found in each honey sample was based on comparison with reference slides. [25][26][27][28] The honey samples were characterized by a low number of pollen types, indicating that the rich flora of the dominant taxa produced ample nectar and pollen for honey production. The results presented in Table 2 show 28 pollen types in the honey samples.…”