aelkordy

Ahmed Elkordy

Lecturer - Lecturer of Plant Taxonomy and Flora

Faculty of science

Address: Botany & Microbiology Dept., Faculty of Science, Sohag University, Sohag, Egypt 82524.

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Pollen diversity in the genus Carlina L. (subtribe Carlininae, Compositae) and its systematic significance

2020 | Keywords Ectocolpi Cardueae Pollen size,
Pollen diversity in the genus Carlina L. (subtribe Carlininae, Compositae) and its systematic significance
Pollen morphology of 19 species, 4 subspecies, and 1 variety of _Carlina_ was studied in detail by light and scanning electron microscopy. Qualitative and quantitative pollen morphological characters which vary between taxa are found in the length of the ectocolpi, presence/nature of the echinae, pollen size and shape, lumina area, P/E ratio, polar axis, equatorial diameter, pollen shape, ectocolpi length, ... Read more

Floristic Diversity and Phytogeography of Mil steppe- Azerbaijan

2019 | Keywords Chorology, Floristic compositi, Kura-Araks lowland, Mil stepp, phytogeographical elements.,
Floristic Diversity and Phytogeography of Mil steppe- Azerbaijan
Chorology and Phytogeography of Mil steppe and environs were studied. The results show that; 926 species belonging to 457 genera and 91 families were recorded. Five families: Poaceae, Asteraceae, Fabaceae, Brassicaceae and Chenopodiaceae contribute 42.51 % of the total plant species recorded in this study. Poaceae is represented by 59 genera (12.83 %) of the total observed plant species. Asteraceae ... Read more

Floristic diversity and vegetation analysis of riparian and aquatic plants of the canals in the Sohag Governorate, Egypt

2019 | Keywords riparian vegetation, life form, flora, diversity, Chorology, canal banks, canal b, biogeography, Aquatic,
Floristic diversity and vegetation analysis of riparian and aquatic plants of the canals in the Sohag Governorate, Egypt
This paper analyzes the five elements of vegetation: floristic composition, lifespan, life form, chorology, and species distribution of the riparian and aquatic flora of canals in the Sohag Governorate of Egypt. The riparian vegetation included 126 taxa belonging to 35 families and 95 genera. Poaceae, Fabaceae and Asteraceae were the dominant plant families (50.00 % of the total number of ... Read more

POLLEN MORPHOLOGY AND NUMERICAL ANALYSIS OF TAMARIX L. (TAMARICACEAE) IN EGYPT AND ITS SYSTEMATIC IMPLICATION

2017 | Keywords Egypt., Tamarix; Pollen Morphology; Numerical Ta,
POLLEN MORPHOLOGY AND NUMERICAL ANALYSIS OF TAMARIX L. (TAMARICACEAE) IN EGYPT AND ITS SYSTEMATIC IMPLICATION
A palynological and multivariate study of six species of Tamarix L. distributed in Egypt was carried out. Pollen morphology was examined by Light Microscope (LM) and Scanning Electron Microscope (SEM). The systematic study of these species was conducted by means of numerical analysis using UPGMA clustering and PCO analysis based on 33 morphological characters, including life form, vegetative parts, fruits, ... Read more

Fruit morphology in Galium section Platygalium (Rubiaceae) and its potential taxonomic significance

2015 | Keywords key., mericarp surface, morphology, fruit, Platygalium, Galium, Rubiaceae,
Fruit morphology in Galium section Platygalium (Rubiaceae) and its potential taxonomic significance
Fruit (mericarp) morphology of nine species from section Platygalium of the genus Galium from Russia were examined with light microscope and scanning electron microscope (SEM). Macro- and micromorphological characters, including fruit shape, size, and types of mericarp surface and indumentum are presented. Three types of mericarp surface were observed, glabrous, hairy with either hooked or straight hairs and tuberculate. The ... Read more

Two subspecies of Galium setaceum (Rubiaceae) in Egypt

2015 | Keywords taxonomiy, systematics, Rubiaceae, morphology, Galium, fruits, Egypt, distribution,
Two subspecies of Galium setaceum (Rubiaceae) in Egypt
The systematics, distribution and morphology of Galium setaceum (Rubiaceae) in Egypt are described in the article. A full discussion is provided of all morphological characters, systematic treatment and nomenclature based on macro characters, such as habit, distribution, leaf, inflorescence, peduncle, pedicel, flowers, and micro characters of trichomes. G. setaceum subsp. decaisni is identified for the flora of Egypt for the ... Read more

ON THE CORRELATION OF POLLEN GRAIN SIZE AND PLOIDY LEVELS OF GENUS GALIUM SECT. PLATYGALIUM

2014 | Keywords ploidy level., correlation, pollen grain, Platygalium, Galium, Rubiaceae,
ON THE CORRELATION OF POLLEN GRAIN SIZE AND PLOIDY LEVELS OF GENUS GALIUM SECT. PLATYGALIUM
Pollen grain size of some species of Galium section Platygalium (Rubiaceae) have been studied in diploids (2n = 2× = 22, in G. boreale, G. valantioides, G. broterianum), tetraploids (2n = 4× = 44, in G. boreale), hexaploids (2n = 6× = 66, in G. boreale) and in dodecaploid (2n = 12× = 132, in G. rubioides), and many other ... Read more

Anatomical Findings of the Genus Galium L. (Rubiacaeae) in Egypt and Their Systematic Implications

2008 | Keywords Anatomy, Galium, Rubiaceae, stem, transverse section,
Anatomical Findings of the Genus Galium L. (Rubiacaeae) in Egypt and Their Systematic Implications
Transverse stem sections of 11 species and 2 subspecies of the genus _Galium_ L. from Egypt were studied by light microscopy. Epidermal cell shape, cortex, xylem, and pith were of good taxonomic value between the taxa. Four types of stem shape were discerned in the transverse sections. The shape of epidermal cells can be used to distinguish between subspecies of ... Read more

Numerical taxonomy of Galium (Rubiaceae) in Egypt

2008 | Keywords UPGMA cluster, Rubiaceae, PCO, Numerical taxonomy, Galium,
Numerical taxonomy of Galium (Rubiaceae) in Egypt
On the basis of fifty morphological characters, including vegetative parts, flowers, fruits, seeds, pollen grains, and anatomical structure, a systematic study of 13 taxa belonging to genus _Galium_ (Rubiaceae) from Egypt was conducted by means of numerical analysis. Four branches and clusters were distinguished. Representatives of these groups were clustered together according to characters with high factor loading in the ... Read more

Fruit and seed morphology in Galium L. (Rubiaceae) and its importance for taxonomic identification

2008 | Keywords Galium, Rubiaceae, morphology, seed, fruit,
Fruit and seed morphology in Galium L. (Rubiaceae) and its importance for taxonomic identification
Fruit (mericarp) and seed morphology of 11 species and two subspecies of _Galium_ were examined with light microscope and scanning electron microscope. Macro- and micromorphological characters, including fruit and seed shape, colour, size, surface, epidermal cell shape, anticlinal boundaries, outer periclinal cell wall and relief of outer cell walls, are presented. Four different types of mericarp surface are described. Three ... Read more