ORIGINAL_ARTICLE
Macro-, micromorphological characters and DNA fingerprinting markers on three Ruprechtia species (Polygonaceae) in Egypt
Macro-,micromorphological characters and DNA fingerprinting markers have been used to differentiate the threeRuprechtia C. A. Meyer species growing in Egypt (R. exelsa, R. polystachya, and R. salicifolia). Interestingly,the macro- and micromorphological criteria of the vegetative organs showed no fundamental characters todiscriminate between the three examined species. However, the data obtained from the seed coat surface (usingLM and SEM) revealed some variability among the tested species. Seed coat surface was colliculate in (R.excelsa), pusticulate in (R. polystachya) and reticulate–scalariform in R. salicifolia. Accordingly, the seed coatsurface can be used as a fundamental criterion to discriminate between the species of this study. The RAPD–PCR electrophoretic profile, showed unique RAPD markers some of which were species-specific. Speciesspecificmarkers were recorded by using primers OPA-01, OPA-02 and OPA-05 respectively. Two RAPDmarkers specific to R. polystachya and R. salicifolia were recorded. The two markers for the former species havea molecular size of 1800 and 2600 bp using primer OPA-01. While those specific to the latter species have amolecular size of 300 and 400 bp using primers OPA-02. For R. excelsa, one specific RAPD marker wasrecorded, it has a molecular size 800 bp using primer OPA-05. The RAPD markers may be considered as validcriteria to discriminate between the three Ruprechtia species used in this investigation. However, the similarityin the banding profile of RAPD-PCR and the morphological criteria justify the maintenance of the three speciesin the same genus.
https://taec.journals.ekb.eg/article_12449_50e534e193706e6b86a8c83b4d0c8aa9.pdf
2001-12-01
1
13
10.21608/taec.2001.12449
Ruprechtia
Polygonaceae
Morphology
Seed coat surface
DNA fingerprinting
Mohamed
Tantawy
mtantawy@asunet.shams.eun.eg
1
Botany Dept., Faculty of Science, Ain Shams University-Egypt.
LEAD_AUTHOR
Maher
Shehata
2
Botany Dept., Faculty of Science, Ain Shams University-Egypt.
AUTHOR
ORIGINAL_ARTICLE
The taxonomic significance of achene in the genus Ranunculus L. in Egypt
Morphological characters of achenes for nine species of Ranunculus among R. sardous Crantz. is new record tothe flora of Egypt. from Egypt have been investigated using light (LM) and scanning (SEM) microscopy. Carpelwall structure for some studied species has also been searched. The achene morphology showed considerablevariations in shape, size, surface pattern and wall structure. The macrocharacters as well as microcharacters ofachenes are discussed in relation to taxonomy and proved their significance in the distinction between the studiedspecies. A key and SEM micrographs of achenes are provided.
https://taec.journals.ekb.eg/article_12450_60599425b56ad5dd2b5ede7b661cfb0a.pdf
2001-12-01
15
25
10.21608/taec.2001.12450
Ranunculus
Ranunculaceae
Morphology
Seed coat surface
seed anatomy
Azza
Shehata
dr_azzashehata@yahoo.com
1
Botany Department, Faculty of Science, Alexandria University
LEAD_AUTHOR
Zaki
Turki
2
Botany Department, Faculty of Science, Menofiya University.
AUTHOR
ORIGINAL_ARTICLE
Lower Carboniferous plants from Abu-Thora Formation in Southwest Sinai
Impressions of stem fragments of Lepidodendrales are described from Lower Carboniferous strata fromAbu-Thora Formation in Southwest Sinai.
https://taec.journals.ekb.eg/article_12452_07662a5c9734aa4a82ceeb5c564a8ff6.pdf
2001-12-01
27
34
10.21608/taec.2001.12452
Abu-Thora Formation
Egypt
Lepidodendrales
Lower Carboniferous
Sinai
Mona
Darwish
monahd@mailexcite.com
1
Botany Department, Faculty of Girls, Ain Shams University, Cairo, Egypt.
LEAD_AUTHOR
Ali
El-Kelani
2
Egyptian Geological Survey, Cairo- Egypt.
AUTHOR
ORIGINAL_ARTICLE
New records to the Bryoflora of Saudi Arabia
Twelve moss species are reported for the first time in Hail, in northeastern part of Saudi Arabia. Among these,three are new records to Saudi Arabia viz Didymodon rigidulus, Crossidium laevipilum and Bryum caespiticium.The first taxon of these three mosses is as well new record to the flora of the whole Arabian Peninsula. Thisbrings the total number of fully identified mosses known from Saudi Arabia to 120 taxa, and those of theArabian Peninsula (excluding Socotra) to 162 taxa.
https://taec.journals.ekb.eg/article_12453_6a010e2bed3011c2f74becfeeeb4e2ee.pdf
2001-12-01
35
44
10.21608/taec.2001.12453
Arabian Peninsula
Bryoflora
Mosses
Saudi Arabia
Mahmoud
Refai
1
Botany Department, Faculty of Science, Ain Shams University, Cairo-Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
Anatomy of salt excretory structures in certain halophytes in Egypt with a special reference to their re- naming and classification
The anatomy of salt excretory structures was studied in 22 dicotyledonous and monocotyledonous halophyticspecies; 13 of which were not previously investigated. The material was selected to represent obligate andfacultative, and succulent and non- succulent halophytes. Structural variations led to their re- naming andclassification. For more precise naming it was believed that one should differentiate between ‘glands’ that haveno ontogenic relation to the epidermis and the epidermal appendages, and convinced by this, the excretorystructures were classified into three types and two sub-types. It was also concluded that the presence of suchstructures in facultative halophytes, where the concerned stress factor (salinity) is absent, makes it a hereditarycharacter resulting in an adaptive capacity for salt tolerance. Ectodesmata were recorded in the outer periclinalwalls of the epidermal cells in some species and were considered to be another mechanism for salt excretion.
https://taec.journals.ekb.eg/article_12454_b5e2c3fb9a1041dad7deb0cff5c67775.pdf
2001-12-01
45
58
10.21608/taec.2001.12454
anatomy
ectodesmata
excretory structures
halophytes
salt glands
Abd El-Salam
Al- Nowaihi
abdelsalamalnowaihi@hotmail.com
1
Botany Department, Faculty of Science, Ain Shams University, Cairo-Egypt.
LEAD_AUTHOR
Magdy
Mourad
2
Department of Botany, Faculty of Science, Ain Shams University, Cairo, Egypt.
AUTHOR
ORIGINAL_ARTICLE
On the taxonomy of Apollonias Nees (Lauraceae). Evidence from general aspects and cuticular features of leaf & fruit.
Leaf and fruit cuticular features (cell form and / or epicuticular secretions) were studied in the Macaronesian endemic tree Apollonias barbujana (cav.)Bornm. using SEM and / or LM. In addition, the macromorphological and floristic aspects of the genus were surveyed. The results were then compared with similar features in 19 available taxa of the Lauraceae representing the tribes Laureae and Perseeae (Five taxa from the present study and 14 compiled from Literature). The data obtained were analyzed by the NT sys- pc program package using the UPGMA clustering method. The produced dendrograms were discussed. The study showed that Apollonias occupies a relatively isolated position in the family with affinities to both the Laureae and the Perseeae. The significance of cuticular features in the taxonomy of the Lauraceae was referred to, and a revision of the suprageneric classification of the family as suggested by Rohwer, 2000 is now strongly supported.
https://taec.journals.ekb.eg/article_12455_67335c4d9a2444cae188f1a5d21e3cc3.pdf
2001-12-01
59
80
10.21608/taec.2001.12455
Apollonias
cuticle
Lauraceae
SEM
Mohammed
Loutfy
1
Mohammed H. A . Loutfy Biological Science and Geology Department. Faculty of Education. Ain Shams University. Roxy (Heliopolis) P.C. 1134. Cairo. Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
The moss flora of Gebel St. Katherine area (Sinai) with nine new records
Sixteen moss species representing eleven genera, six families and five orders are reported from Gebel St.Katherine area including nine new records. Mosses known from this area amount to 28 taxa. Diagnostic features,notes on morphology-habitat relations and moss abundance of the 16 taxa are provided and a key for theidentification of the mosses known at present from the study area based on gametophytic characters isconstructed.
https://taec.journals.ekb.eg/article_12456_b028180853e1eaa2c2d52a8e2e011b47.pdf
2001-12-01
81
90
10.21608/taec.2001.12456
Egypt
Gebel St. Katherine mountain
moss flora
Southern Sinai
Usama
Abou-Salama
salama12000@yahoo.com
1
Botany Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
Production of salt tolerant embryos and cytological changes associated with tolerance in microspores of oilseed rape
Experiments were carried out to investigate the potential for selecting microspores tolerant to NaCl and subsequently to regenerate pollen-derived plantlets. The oil rapeseed plant Brassica napus L.Topas was used in this investigation. Microspores at appropriate stage of development were isolated from anthers and cultured in liquid medium using a range of NaCl concentrations to establish the dose response. The low levels of sodium chloride in culture medium imposed stress on the cultured microspores resulting in symmetrical embryogenic division. Microspore embryogenesis was entirely halted when the culture medium was supplemented with high levels of salt. Ultrastructural survey indicated that microspores grown under saline condition were characterized by accumulation of large number of ribosomes and endoplasmic reticulum in the cytoplasm, formation of thick wall and persistence of large vacuole and presence of numerous lipid droplets. These results indicate that alteration in cytological pattern of cell grown under saline condition is a key factor for regulation of the system that in turn confers resistance to saline stress. The mechanism by which sodium chloride possibly exerts its effect on genes is discussed.
https://taec.journals.ekb.eg/article_12457_51c2bd5e7fd41a94c0def9a5499bb013.pdf
2001-12-01
91
101
10.21608/taec.2001.12457
Microspore culture
pollen embryogenesis
salt stress
Ultrastructure
Maged
Zaki
1
Laboratory of Plant Biotechnology, Institute for Efficient Productivity, University of Zagazig, Zagazig, Egypt
LEAD_AUTHOR
Sahar
Tawab
2
Department of Botany, Faculty of Science, College for Girls, University of Ain Shams, Cairo, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Detarioxylon aegyptiacum (Leguminosae), from Lower Miocene marine sediments in Southern Sinai.
The petrified wood Detarioxylon aegyptiacum (Unger) Louvet & Boureau, Leguminosae, is new to Sinai. Itis reported embedded in Rudeis Formation at Lower Miocene beds of Gebel Hadahid.
https://taec.journals.ekb.eg/article_12458_db4be9311fef72a0539ac31401c9984d.pdf
2001-12-01
103
114
10.21608/taec.2001.12458
Detarioxylon
Fossil wood
Leguminosae
Miocene
Sinai
Xylotomy
Marwah
Kamal-El-Din
1
Botany Department, Faculty of Science Ain Shams University, Cairo, Egypt.
LEAD_AUTHOR
Ahmed
Refaat
2
Geology Department, Faculty of Science Cairo University, Giza, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Floristic composition and zonation of seaweeds on Zabargad Reef (Red Sea, Egypt)
Composition, dominance, distribution and zonation of seaweeds were investigated, using line-transect technique,in three sites of varied water activity on Zabargad reef during November 1994. Fifty-four taxa included 16 green,13 brown and 25 red macroalgae were identified, adding four new records for the Red Sea. The flora appearsrich and diverse, composed of filamentous, turf-forming, fleshy sac, foliose, erect shoot, and coralline forms. Itshowed a geographic distribution pattern similar to that of the Indo-Pacific.The seaweed vegetation appears heterogeneous, having a dissimilar construction at each side of thereef. It showed a conspicuous zonation, revealing six zones related in general to reef topography, watermovement and in a lesser extent to grazing and nutrient enrichment. The intertidal zone had a marked reducedflora due to exposure to air during low tide, and mobility of coral sand. Reef flat was the richest in speciescomposition and dominance, as it lies in a shallow, well-illuminated, and less fluctuated subtidal region. Peculiarwas the presence of high species dominance in strong surf on the windward reef crest. The reason for this is thatthe crest is extensively eroded, rich in crevices and fissures within which the algae hideaway from wave action.Moreover, strong rhizoids, dwarfing of thalli, crustose morphologies, growing in adherent to substrata weresome modifications allowing algae to persist in strong surf.
https://taec.journals.ekb.eg/article_12459_382b341c15b3d1eefb002fb6a098d4db.pdf
2001-12-01
115
134
10.21608/taec.2001.12459
Seaweeds
Biogeography
marine zonation
algal reef
Zabargad
Red Sea
Islam
El-Manawy
1
Botany Dept., Fac. of Science, Suez Canal University
LEAD_AUTHOR
ORIGINAL_ARTICLE
Papyrus and Papyrus–like paper sheets, their quality in relation to anatomical features
Papyrus and papyrus-like paper sheet were fabricated from the culms of sedges, rushes, and grasses and the leafblades of banana The characters and quality of the manufactured paper sheets are discussed in relation to thecellular structure of the relevant plant organs used for the production of paper sheets. The best and good qualitiesof paper sheets are those manufactured from culms consisting of high amounts of cellulose element includingparenchyma aerenchyma. The moderate and lower qualities of paper sheets comprise, in addition to cellulosicelements, higher amounts of lignified elements including fibre
https://taec.journals.ekb.eg/article_12460_700cc76fbea2ac2cdeb1717bf5c23531.pdf
2001-12-01
135
141
10.21608/taec.2001.12460
Cellular elements
papyrus and papyrus-like paper sheets quality
Nahed
Waly
nwaly89@hotmail.com
1
Herbarium, Botany Department Faculty of Science, Giza 12613, Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
Pollen Atlas of the Flora of Egypt. 2. Species of Polygonaceae*
Pollen grains of 20 species belonging to 7 genera of Polygonaceae represented in the Flora were studied usingLight and Scanning Electron Microscope. Pollen characters, including those of size, shape, exine sculpture andstructure of the aperture allowed the recognition of five pollen types: Atraphaxixs, Calligonum-Oxygonum,Persicaria, Polygonum and Rumex-Emex types. A key for the seperation of the different types is provided andthe pollen morphology in relation to taxonomy of the investigated taxa is briefly discussed.
https://taec.journals.ekb.eg/article_12461_eca5bf698d9ee5e0831423b7c2d216c6.pdf
2001-12-01
143
151
10.21608/taec.2001.12461
Flora of Egypt
Pollen Atlas
Polygonaceae
Salah
El Naggar
1
Botany Department, Faculty of Science, Assiut University.
LEAD_AUTHOR
Nahed
El-Husseini
2
The Herbarium – Botany Department, Faculty of Science, Cairo University, Giza, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Floral morphology of certain species of the Papilionaceae with a special reference to stamen adelphy
The floral morphology of the three papilionaceous species: Ononis vaginalis Vahl , Dolichos lablab L. andCrotalaria aegyptiaca Benth. was studied to trace the organ vascularization. Vascular complexes to the sepals,the petals and the stamens were recorded in the three species. Three cases of stamen adelphy were met with viz.monadelphy, diadelphy and pseudomonadelphy. In the latter case a basal fenestration in the staminal tube existsas an access to successful insect pollination. A foliar nature was determined for the nectary disc where present.In the three species the carpel is supplied by the basic number; one dorsal and two ventral traces.
https://taec.journals.ekb.eg/article_12462_bd16b07ab38a715d5cfc9e5b52d865b6.pdf
2001-12-01
153
172
10.21608/taec.2001.12462
Floral morphology
stamen adelphy
Abd El-Salam
Al- Nowaihi
abdelsalamalnowaihi@hotmail.com
1
Botany Department, Faculty of Science, Ain Shams University, Cairo-Egypt.
LEAD_AUTHOR
Karima
Hamed
karimahamed@hotmail.com
2
Botany department, Faculty of Science Ain Shams University, Cairo – Egypt
AUTHOR
Magdy
Mourad
3
Botany department, Faculty of Science Ain Shams University, Cairo – Egypt
AUTHOR
ORIGINAL_ARTICLE
Our present knowledge of the bryoflora of United Arab Emirates
Seventeen, out of 29 mosses, and two hepatics, recently collected from the United Arab Emirates(UAE), are new records for the country and the total number of bryophytes is raised to 61 entities (51mosses & 10 hepatics). Eight mosses are new records to the whole Arabian Peninsula including threemosses which are new records to South-West Asia. Habitats and distribution of the 31 collected taxaare given together with an artificial key to all recorded mosses.
https://taec.journals.ekb.eg/article_12463_760a651d7737588317a8a97fd9dddc1f.pdf
2001-12-01
173
186
10.21608/taec.2001.12463
bryophytes
hepatics
Mosses
United Arab Emirates
Wagieh
El- Saadawi
elsaadawy@link.com.eg
1
Botany Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
LEAD_AUTHOR
Hanaa
Shabbara
2
Botany Department, Faculty of Science, Ain Shams University.Cairo-Egypt.
AUTHOR