African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 688

Full Length Research Paper

Pollen morphology of six species of subfamily Stachyoideae (Lamiaceae) in Saudi Arabia

Ahlam A. Al-Watban
  • Ahlam A. Al-Watban
  • Botany and Microbiology Department, King Saud University, P. O. Box 2455, Riyadh, Saudi Arabia.
  • Google Scholar
Abdullah R. Doaigey*
  • Abdullah R. Doaigey*
  • Botany and Microbiology Department, King Saud University, P. O. Box 2455, Riyadh, Saudi Arabia.
  • Google Scholar
Mohamed El-Zaidy
  • Mohamed El-Zaidy
  • Botany and Microbiology Department, King Saud University, P. O. Box 2455, Riyadh, Saudi Arabia.
  • Google Scholar


  •  Received: 27 February 2015
  •  Accepted: 21 May 2015
  •  Published: 31 May 2015

Abstract

The pollen morphological characters of 6 species belonging to 4 genera of the subfamily Stachyoideae (Lamiaceae) growing naturally in Saudi Arabia were investigated with the aid of light microscope (LM) and scanning electron microscope (SEM), to find new features that might increase knowledge of pollen morphology of the species, and also to help the taxonomic characterization of the Stachyoideae genera. The morphological characters studied were size, shape, tectum surface ornamentation, number and type of the colpi. The study indicated that the average size of the pollen was different among the species since the smallest size was that of Nepeta deflersiana (P = 25.2 ± 2 and E = 15 ± 3) while the largest size was that of Salvia aegyptiaca (P =36.5 ± 2 and E = 30.3 ± 2). Pollen shape is spheroidal to sub-spheroidal or prolate. The fine structure of the exine of pollen was slightly different among investigated species. The number and type of colpi of the pollen in species studied were 6-zonocolpate type except those of N. deflersiana and Otostegia fruticosa ssp. schimperi having 3-zonocolpate.

 

Key words: Pollen grains, pollen morphology, Lamiaceae, Stachyoideae, Saudi Arabia.