Abdo El Samad, N., Gabr, D., khafagi, A., Mohamed, A. (2023). Pollen Grains and Caryopsis Features of Selected Poaceae species and Their Taxonomic Significance. test, 2(2), 256-274. doi: 10.21608/ijtar.2023.212100.1059
Nedaa Khalil Khalil Abdo El Samad; Dalia Goda Gabr; azza Ahmed khafagi; Amal Hassan Mohamed. "Pollen Grains and Caryopsis Features of Selected Poaceae species and Their Taxonomic Significance". test, 2, 2, 2023, 256-274. doi: 10.21608/ijtar.2023.212100.1059
Abdo El Samad, N., Gabr, D., khafagi, A., Mohamed, A. (2023). 'Pollen Grains and Caryopsis Features of Selected Poaceae species and Their Taxonomic Significance', test, 2(2), pp. 256-274. doi: 10.21608/ijtar.2023.212100.1059
Abdo El Samad, N., Gabr, D., khafagi, A., Mohamed, A. Pollen Grains and Caryopsis Features of Selected Poaceae species and Their Taxonomic Significance. test, 2023; 2(2): 256-274. doi: 10.21608/ijtar.2023.212100.1059

Pollen Grains and Caryopsis Features of Selected Poaceae species and Their Taxonomic Significance

International Journal of Theoretical and Applied Research
Volume 2, Issue 2, December 2023, Pages 256-274    PDF (1.25 M)
Document Type: Original Article
DOI: 10.21608/ijtar.2023.212100.1059
Authors
Nedaa Khalil Khalil Abdo El Samad* 1; Dalia Goda Gabr2; azza Ahmed khafagi3; Amal Hassan Mohamed4
1Botany and Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Nasr City, Cairo.
2Botany and microbiology Department, faculty of Science, Al-Azhar University (Girls Branch), Nasr City, Cairo.
3botany &; microbiology department - faculty of science - Al Azhar university girls branch
4Botany and Microbiology Department, Faculty of Science - Al-Azhar University (Girls Branch), Nasr City, Cairo.
Abstract
Pollen grains and caryopsis morphology of seventeen species belongs to seventeen genera, eight tribes and three subfamilies of Poaceae were studied by using light and scanning electron microscopes. Morphological characters of pollen grains and caryopsis coat are very important traits which can be used at taxonomic level. Pollen grains are mostly oblate-spheroidal, spheroidal and prolate-spheroidal while recorded six shapes elliptic, oblong, ovate, broad ovate, obovate and rounded for caryopsis. On the basis of exine ornamentations five distinct pollen types are recognized (verrucate-granulate, areolate-granulate, micro gemmate, micro gemmate-granulate and granulate) and nine different patterns for caryopsis surface coat (reticulate, rugose, scalariform, striate, reticulate - foveate, reticulate-rugose, reticulate-striate, ruminate and striate -favulariate). The size, shape, exine thickening, exine ornamentation, operculum and annulus diameter of pollen grains are very important characteristics for delimiting the species. Palynology do not support the tribal and generic classification, whereas the morphology of caryopsis is crucial for identifying the taxa in the family Poaceae.
Keywords
Pollen grains; Caryopsis; Numerical analysis and Poaceae
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