@article { author = {Shiha, Mona}, title = {Taxonomic significance of stamens and pollen morphology of some selected taxa of Primulaceae in Egypt}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {1-11}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.22006.1013}, abstract = {Abstract The circumscription study of Primulaceae is still uncertain and remains controversial. Stamens and pollen grains morphological characters of five species and one variety representing five genera viz.,Anagallis, Lysimachia, Coris, Primula and Samolus of Primulaceae in Egypt have been studied using LM and SEM. The specific target of the present study is to evaluate the taxonomic value of the macro and micromorphological characters of stamens and pollen grains in order to distinguish between the studied species. The obtained results showed remarkable variations in anther shape, anther dehiscence, filament attachment and presence of trichomes on the anther filament. Pollen grains are radially symmetrical, isopolar, spheroidal-subprolate to prolate, with amb angulaperturate or fossaperturate and tricolpate or tricolporate. Tectum is microreticulate, reticulate with perforated lumine and clavate exine ornamentation. Out of the studied taxa Coris monspeliensis is distinguished by the presence of prominent margo, reticulate exine ornamentation, minute luminal perforations decreasing towards the colpi, orbicular anther shape, latrorse dehiscence of anthers with short longitudinal slit and presence of glandular diseriate trichomes at the base of the filaments. Clavate exine ornamentation as well as lanceolate anther shape, extrorse dehiscence and short filament can distinguished Samolus valerandi from the remaining studied taxa. An artificial key for the studied species was constructed based on stamens and pollen morphological criteria is provided.}, keywords = {Key words: Anther dehiscence,Exine ornamentation,Primulaceae,Pollen grains,Stamen}, url = {https://taec.journals.ekb.eg/article_68894.html}, eprint = {https://taec.journals.ekb.eg/article_68894_a5f3f4d4421a4ae434ac778dcf27ff98.pdf} } @article { author = {Saleh, Amal and Elatroush, Hala}, title = {Impact of Different Geographical Locations on Genetic Variation and Phytochemical Constituents of Two Medicinal Marine Algae.}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {12-26}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.21902.1012}, abstract = {Genetic variation and phytochemical constituents of Dictyota dichotoma and Sargassum dentifolium, collected from Hurghada and Abu-Qir bay, were investigated. Results revealed an increase in the concentrations of carotenoids, sugars and DPPH% in the samples of both algal species collected from Hurghada as compared with those collected from Abu-Qir. In the samples collected from Hurghada, an increase in the concentrations of chlorophyll a, b and phenols was recorded in S. dentifolium; while a decrease in chlorophyll a, b only was observed in D. dichotoma. No significant difference was observed in phenol concentrations between D. dichotoma samples collected from the two studied localities. DNA was isolated and thirteen SCoT molecular markers were used to detect the genetic variation between samples from the two different localities. In D. dichotoma, the total average polymorphism is 56.68%. SCoT-1 exhibited the highest polymorphism (80%), while SCoT-28 recorded the lowest polymorphism (35.71%). In S. dentifolium, the total average polymorphism is 61.63%. SCoT-3 exhibited highest polymorphism (90%), while SCoT-13 exhibited the lowest polymorphism (0.09%).In addition, BSI factor shows a marked difference between the two studied algae that it was 0.87 % in D. dichotoma and 0.77 % in S. dentifolium. Variation in geographical location affects genetic variation and phytochemical composition of D. dichotoma and S. dentifolium. The difference in the responses of the two studied algae to the change of locality and environmental conditions may reflect differences in their gene expression. The efficiency of SCoT markers to discriminate between algal species collected from different localities has been confirmed.}, keywords = {Dictyota dichotoma,genetic variation,phytochemical composition,Sargassum dentifolium,SCoT}, url = {https://taec.journals.ekb.eg/article_78122.html}, eprint = {https://taec.journals.ekb.eg/article_78122_580b1b20bb1ec1de5a394fe88a734f76.pdf} } @article { author = {Osman, Samira and Mostafa, Essam and El-Ashry, Zeinab and Mohamed, Fawzia and Elatroush, Hala and El-Khodary, Soheir}, title = {Phenetic and Phylogenetic Relationships of Egyptian Hordeum vulgare L. Using Agro-morphological Criteria, Molecular Marker and Genes Expression}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {27-40}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.23618.1015}, abstract = {Phenetic and phylogenetic relationships between ten Hordeum vulgare L. taxa , seven cultivars (Giza 123, Giza 126, Giza 127, Giza 128, Giza 129, Giza 130 and Giza 2000) and three landraces collected from Sinai (El-Kheroba, El-Sheikh Zuwaid and Wadi Sedr). This study was carried out using morphological criteria, molecular genetic markers (SSRs) and finally soluble protein patterns. The results of morphological traits reflected that Giza 2000 and Wadi Sedr gave superior in vegetative growth and yield productivity in contrast to Giza 129, which showed an inferior vegetative growth and yield. The SSR analyses using 7 primers and revealed detection of a total of 15 bands, among which 8 bands (61.22%) were polymorphic. Finally we can conclude that, the genetic distance tree was produced by UPGMA based on morphological data stated the pedigree of studied cultivars. However, in the tree based on molecular markers (SSRs) and soluble proteins patterns were not in full agreement with the pedigree.}, keywords = {Hordeum vulgare L,genetic relationships,morphological Criteria,SDS-PAGE Electrophoresis,Molecular markers (SSR-PCR)}, url = {https://taec.journals.ekb.eg/article_78378.html}, eprint = {https://taec.journals.ekb.eg/article_78378_4bc20058cea0b9f86442850b0b042c41.pdf} } @article { author = {El-Beheiry, Mohamed and Hosni, Hasnaa and Sharaf El-din, Ahmed and Shaltout, Salma and Ahmed, Dalia}, title = {Updating the checklist of the alien flora in Egypt}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {41-56}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.21300.1011}, abstract = {The present study aims to update the list of the alien species in the Egyptian flora, which prepared from literature reviewing, field trips and herbaria consultation. The recent list includes 250 taxa (11.7% of the Egyptian flora); including 5 subspecies and two varieties; related to 161 genera and 41 families. Three states of alien species are recognized: causals (114 taxa), naturalized (129 taxa) and, invasive (7 taxa). The most represented life form is the therophytes. On the other hand, four geophytes-helophytes and three hydrophytes. Four major habitats supporting the distribution of these species: cultivated land, wetland, ruderal and natural habitats. The cultivated lands are the most represented. These alien taxa belong to 16 origins: 12 in the Old World (with 156 taxa) and four origin belong to New World (with 117 taxa), Pantropic (with four taxa) and palaeotropics (with 11 taxa). The same taxon may have more than origin. The most represented taxa were from South and Tropical America (58 taxa = 23.2 %), South Asia (51 taxa = 20.4 %) followed by Europe (38 = 15.2 %). The highest taxa were recorded in family Poaceae (74), Amaranthaceae s.l. (25), Fabaceae (23), Asteraceae (20), Solanaceae (16) followed Euphorbiaceae (10 taxa). }, keywords = {Egypt,Causal species,invasive species,Naturalized species,Urban habitats}, url = {https://taec.journals.ekb.eg/article_78648.html}, eprint = {https://taec.journals.ekb.eg/article_78648_075aeb1e8ecd268eb2c44663116d570e.pdf} } @article { author = {Shamso, Eman and Hosni, Hasnaa}, title = {First record of Egeria densa Planch. (Hydrocharitaceae) for the aquatic Flora of Egypt}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {57-63}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.24772.1016}, abstract = {Egeria densa Planch. is reported for the first time for the aquatic flora of Egypt. This species is a South American aquatic plant species considered highly invasive outside of its original range. In Egypt, the species may have been introduced as an aquarium plant and has long been wrongly identified as Elodea canadensis. However, it was collected from wild habitat at the northern lake of Egypt (Idku Lake). The article presents data on the comprehensive morphological and palynological features, distribution, ecological notes and conservation status in Egypt of the newly recorded taxon, as well as photographs of herbarium samples, were also provided. This species has not been reported yet in North Africa, except for Algeria. The new record of its presence in Egypt fills the gap in its general distribution in the warm temperate region of the world. Based on the present study Hydrocharitaceae in Egypt, are now represented by 7 genera viz. Halophila, Thalassia, Ottelia, Vallisneria, Elodea, Najas and Egeria. The present data indicate that there are insufficient collections of Egeria densa in Egypt considering that the aquatic flora of Egypt is poorly known.}, keywords = {Egeria densa,Egypt,First record,Hydrocharitaceae,Idku Lake}, url = {https://taec.journals.ekb.eg/article_78679.html}, eprint = {https://taec.journals.ekb.eg/article_78679_0a1c32a2820f213bfb0ad451c51fd911.pdf} } @article { author = {Shehata, faiza and Aqlan, Esam}, title = {Embryo and seedling morphology of some Trifolium L. species (Fabaceae).}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {64-84}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.25128.1017}, abstract = {The present study aims to describe and characterize the The present study aims to describe and characterize the morphology of the embryo and the seedling; including the cotyledonary, the first unifoliate and first trifoliate foliage leaves and their importance in the taxonomy of the studied Trifolium species. Macromorphological (cotyledon, seedling with first unifoliate leaves and first trifoliate leaves) studies carried on 15 Trifolium species. Qualitative and quantitative characteristics of the embryo, seedling with cotyledonary, seedling with first unifoliate and second trifoliate leaves indicated that cotyledon characters (cotyledon shape; L/W ratio, apex, colour, radicle position; shape, apex), cotyledonary leaves (hypocotyl colour, blade shape, L/W ratio), first and second leaves (shape, apex base, margin and texture). Numerical analysis is carried and also phenogram illustrating the relationship between the studied taxa were constructed by calculating the average taxonomic distance. Results have a taxonomic significance in identification and differentiation between the studied 15 Trifolium species. An identification key was prepared.}, keywords = {embryo,Fabaceae,first & second foliage morphology,Seedling,Trifolium}, url = {https://taec.journals.ekb.eg/article_82998.html}, eprint = {https://taec.journals.ekb.eg/article_82998_48859078ad71dc684f358aa38d0a8c5c.pdf} } @article { author = {Taia, Wafaa and Shehata, Azza and Elshamy, Eslam and Ibrahim, Manaser}, title = {Biosystematic studies for some Egyptian Amaranthus L. taxa and their significance in their identification.}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {85-99}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.26080.1018}, abstract = {Ten Egyptian Amaranthus species have been collected from the field and their inflorescence, floral, pollen grains, fruit, and seeds have been studied carefully by using both stereo- and Scanning electron microscopes. The results has been analyzed using PAST program and gave clustering dendrogram for the studied taxa. The result obtained showed that from the most important character in the identification of the taxa is the number of flowers/unit area of the terminal panicle, beside the type of inflorescence. Pollen morphology gave little account in the circumscription of the studied taxa. Type of fruit indehiscent versus indehiscent fruits can be used in the recognition of some species. Seed shape, micropyle position and microstructure features are more efficient in the identification of the studied taxa beside the fruit characters. In spite of that, seed characters can help in distinguishing the species, but they are not in accordance with the division of the taxa into distinct sections.}, keywords = {Bract,Flower,fruit,seed,Taxonomy}, url = {https://taec.journals.ekb.eg/article_83001.html}, eprint = {https://taec.journals.ekb.eg/article_83001_d3b1cb5a6f8501543617d0170189c06f.pdf} } @article { author = {El-Noamani, Zainab}, title = {Anatomical and palaecological consideration of Neogene Terminalioxylon (Combretaceae) from Egypt}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {100-111}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.31098.1019}, abstract = {Anatomical features of three species of the genus Terminalioxylon Schönfeld emend. Mädel-Angeliewa & Müller-Stoll viz., T. edwardsii, T. geinitzii and T. primigenium were fully described and illustrated based on fossil wood specimens collected from three lower Miocene sites in the northern part of the Western Desert of Egypt viz., Gebel El-Khashab, Wadi Natrun and Cairo-Bahariya desert road. Wood functional traits such as vessel porosity, vessel grouping, perforation plates, vessel diameters, vessel frequency and vessel element length; along with the probable nearest living relatives are used to reconstruct the palaeoclimatic and palaecological assumptions for the three described species. These data indicate that the three species were supposed to have inhabited lowland tropical dry forests where T. edwardsii and T. primigenium were medium-large trees with deep roots, thus not subjected to water stress in dry periods; while T. geinitzii was a shrub or small tree with shallow roots exposed to drought in seasonal dry periods.}, keywords = {Combretaceae,Ecological wood anatomy,Egypt,Neogene,Terminalioxylon}, url = {https://taec.journals.ekb.eg/article_99717.html}, eprint = {https://taec.journals.ekb.eg/article_99717_ac7799de696dccd389e29531e36751f8.pdf} } @article { author = {Selim, Mohamed}, title = {Systematic study on some Urticaceae Juss. species from Egypt}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {112-129}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.38666.1023}, abstract = {Five out of six species belonging to the three genera of Urticaceae were collected from different location in Egypt and subjected in this study. Pollen and seed external morphological characters beside stem and lamina internal characters were examined and photographed using both Light (LM) and Scanning Electron (SEM) Microscopes to assess the use of the studied characters in the separation and identification of species. The most diagnostic characters of both stem and lamina were; dissected or continuous siphonostelic structure of the vascular tissue, dorsiventral lamina, cystolith, stinging hairs, ruminate, rugose or colliculate epidermal cell surface. As well as the shape and size of the pollen grains beside the exine ornamentation, in addition to seed surface ornamentations can be of help in the discrimination of the studied species. The most obvious variable characters obtained in constructing an artificial taxonomic key for the studied species. All The 37 variable character states were subjected to the classical cluster analysis (UPGMA) and the principal component analysis (PCA) using PAST version 3.16 software and clearly revealed the splitting of the studied taxa into two clusters and three groups.}, keywords = {cluster analysis,Morphology,Pollen,seed,Urticaceae}, url = {https://taec.journals.ekb.eg/article_120210.html}, eprint = {https://taec.journals.ekb.eg/article_120210_71092ed4c8e05f45dee68766006aa4d3.pdf} } @article { author = {Elshaer, Hossam and Hellal, Ahmed}, title = {Genetic Diversity Based on SSR Markers and Morphological Analysis of faba bean (Vicia faba L.) in Egypt}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {130-142}, year = {2020}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.48358.1026}, abstract = {Vicia faba L. is the most vital legumes and widely cultivated in all the world. Cultivation of tolerant genetic variants is the correct way to avoid the influences of drought on crops. Allocated space adequacy of genetic difference in commercial bean cultivars. Molecular markers are benfial tools for choice among sorts. Therefore, the aim of this study was to evaluate the genetic and morphological variations to for further application in plant breeding research. In this study, five simple sequence repeats (SSR) primers were used to explain genetic and morphological diversity from 18 Egyptian faba beans cultivars were collected from different places in Egypt; 14 lines from different population in addition Giza 2, Giza 3 and 716 Giza and T.W from Sudan. The results of this study, SSR markers are effective in estimating the germplasm of Egyptian beans. SSR markers results ranged from 15bp to 202bp with average of allele number 9.2 allele/markers. In addition, the morphological variation showed that obvious differences between the 18 genotypes in the 2018 and 2019 seasons also. Data results from SSR and quantitative traits showed that the best nine genotypes were in vegetative traits and tolerating conditions in Egypt Giza 2, L.168, L.171, L.175, L.180 B, L.180 C, L.219, L.223 then T.W compared with the all genotypes and the cultivated varieties.}, keywords = {(Vicia faba L.),Genetic diversity,SSR marker}, url = {https://taec.journals.ekb.eg/article_129898.html}, eprint = {https://taec.journals.ekb.eg/article_129898_5c29aa840e6c2b194b06bc1979030ae6.pdf} } @article { author = {Nosair, Hala}, title = {Genetic diversity studies on seven Egyptian wheat (Triticum aestivum) cultivars using Scot and ISSR polymorphism markers.}, journal = {Taeckholmia}, volume = {40}, number = {1}, pages = {143-151}, year = {2021}, publisher = {Cairo University Herbarium (CAI)}, issn = {1110-7413}, eissn = {2357-044X}, doi = {10.21608/taec.2020.39905.1025}, abstract = {Assessment of genetic diversity of crops by using informative molecular markers is important for their genetic improvement and conservation. Genetic diversity and relationships among seven Egyptian cultivars of wheat (Triticum aestivum L) (Masr1, Swiss2, Swiss4, Giza7, Giza9, Giza10 and Sakha94)were analyzed using SCoT and ISSR markers. A total of 7 SCoT and 7 ISSR primers were used to estimate genetic polymorphism among seven wheat cultivars (Masr1, Swiss2, Swiss4, Giza7, Gisa9, Giza10 and Sakha94) . DNA extraction was done using Thermo Kit according to its manufacturer’s instructions followed by amplifications with ISSR and SCoT and agarose gel electrophoresis. Based on UPGMA both ISSR and SCoT markers resolved cultivars into dendrogram with three major clusters .The reproducible bands were scored for analyses polymorphic information content (PIC), Resolving power (RP) and Marker index(MI). Comparatively, two markers were effective. The average polymorphic information content (PIC), Resolving power (RP)and Marker index (MI) of SCoT were reflected relatively higher than those of ISSR. According to the present results, SCoT markers proved more informative in studying genetic diversity among seven wheat cultivars. The results demonstrated that SCoT and ISSR markers are useful for genetic diversity analysis of wheat cultivars. This information is useful for utilization in plant breeding programs.}, keywords = {Inter-simple sequence repeats (ISSR),Start Codon Targeted (SCoT) marker,Polymorphic Information Content (PIC),Resolving power (RP)and Marker index (MI)}, url = {https://taec.journals.ekb.eg/article_130496.html}, eprint = {https://taec.journals.ekb.eg/article_130496_db620f66ae47a9d41831d3c432482e98.pdf} }