Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Macro-, micromorphological characters and DNA fingerprinting markers on three Ruprechtia species (Polygonaceae) in Egypt1131244910.21608/taec.2001.12449ENMohamedTantawyBotany Dept., Faculty of Science,
Ain Shams University-Egypt.MaherShehataBotany Dept., Faculty of Science,
Ain Shams University-Egypt.Journal Article20001116Macro-,micromorphological characters and DNA fingerprinting markers have been used to differentiate the three<br />Ruprechtia C. A. Meyer species growing in Egypt (R. exelsa, R. polystachya, and R. salicifolia). Interestingly,<br />the macro- and micromorphological criteria of the vegetative organs showed no fundamental characters to<br />discriminate between the three examined species. However, the data obtained from the seed coat surface (using<br />LM and SEM) revealed some variability among the tested species. Seed coat surface was colliculate in (R.<br />excelsa), pusticulate in (R. polystachya) and reticulate–scalariform in R. salicifolia. Accordingly, the seed coat<br />surface can be used as a fundamental criterion to discriminate between the species of this study. The RAPD–<br />PCR electrophoretic profile, showed unique RAPD markers some of which were species-specific. Speciesspecific<br />markers were recorded by using primers OPA-01, OPA-02 and OPA-05 respectively. Two RAPD<br />markers specific to R. polystachya and R. salicifolia were recorded. The two markers for the former species have<br />a molecular size of 1800 and 2600 bp using primer OPA-01. While those specific to the latter species have a<br />molecular size of 300 and 400 bp using primers OPA-02. For R. excelsa, one specific RAPD marker was<br />recorded, it has a molecular size 800 bp using primer OPA-05. The RAPD markers may be considered as valid<br />criteria to discriminate between the three Ruprechtia species used in this investigation. However, the similarity<br />in the banding profile of RAPD-PCR and the morphological criteria justify the maintenance of the three species<br />in the same genus.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201The taxonomic significance of achene in the genus Ranunculus L. in Egypt15251245010.21608/taec.2001.12450ENAzzaShehataBotany Department, Faculty of Science, Alexandria UniversityZakiTurkiBotany Department, Faculty of Science, Menofiya University.Journal Article20001212Morphological characters of achenes for nine species of Ranunculus among R. sardous Crantz. is new record to<br />the flora of Egypt. from Egypt have been investigated using light (LM) and scanning (SEM) microscopy. Carpel<br />wall structure for some studied species has also been searched. The achene morphology showed considerable<br />variations in shape, size, surface pattern and wall structure. The macrocharacters as well as microcharacters of<br />achenes are discussed in relation to taxonomy and proved their significance in the distinction between the studied<br />species. A key and SEM micrographs of achenes are provided.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Lower Carboniferous plants from Abu-Thora Formation in Southwest Sinai27341245210.21608/taec.2001.12452ENMonaDarwishBotany Department, Faculty of Girls, Ain Shams University, Cairo, Egypt.AliEl-KelaniEgyptian Geological Survey, Cairo- Egypt.Journal Article20001005Impressions of stem fragments of Lepidodendrales are described from Lower Carboniferous strata from<br />Abu-Thora Formation in Southwest Sinai.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201New records to the Bryoflora of Saudi Arabia35441245310.21608/taec.2001.12453ENMahmoudRefaiBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.Journal Article20001013Twelve moss species are reported for the first time in Hail, in northeastern part of Saudi Arabia. Among these,<br />three are new records to Saudi Arabia viz Didymodon rigidulus, Crossidium laevipilum and Bryum caespiticium.<br />The first taxon of these three mosses is as well new record to the flora of the whole Arabian Peninsula. This<br />brings the total number of fully identified mosses known from Saudi Arabia to 120 taxa, and those of the<br />Arabian Peninsula (excluding Socotra) to 162 taxa.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Anatomy of salt excretory structures in certain halophytes in Egypt with a special reference to their re- naming and classification45581245410.21608/taec.2001.12454ENAbd El-SalamAl- NowaihiBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.MagdyMouradDepartment of Botany, Faculty of Science, Ain Shams University, Cairo, Egypt.Journal Article20001224The anatomy of salt excretory structures was studied in 22 dicotyledonous and monocotyledonous halophytic<br />species; 13 of which were not previously investigated. The material was selected to represent obligate and<br />facultative, and succulent and non- succulent halophytes. Structural variations led to their re- naming and<br />classification. For more precise naming it was believed that one should differentiate between ‘glands’ that have<br />no ontogenic relation to the epidermis and the epidermal appendages, and convinced by this, the excretory<br />structures were classified into three types and two sub-types. It was also concluded that the presence of such<br />structures in facultative halophytes, where the concerned stress factor (salinity) is absent, makes it a hereditary<br />character resulting in an adaptive capacity for salt tolerance. Ectodesmata were recorded in the outer periclinal<br />walls of the epidermal cells in some species and were considered to be another mechanism for salt excretion.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201On the taxonomy of Apollonias Nees (Lauraceae). Evidence from general aspects and cuticular features of leaf & fruit.59801245510.21608/taec.2001.12455ENMohammedLoutfyMohammed H. A . Loutfy
Biological Science and Geology Department. Faculty of Education. Ain Shams University. Roxy (Heliopolis) P.C. 1134. Cairo. Egypt.Journal Article20000902Leaf 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.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201The moss flora of Gebel St. Katherine area (Sinai) with nine new records81901245610.21608/taec.2001.12456ENUsamaAbou-SalamaBotany Department, Faculty of Science,
Ain Shams University, Cairo, Egypt.Journal Article20000115Sixteen moss species representing eleven genera, six families and five orders are reported from Gebel St.<br />Katherine area including nine new records. Mosses known from this area amount to 28 taxa. Diagnostic features,<br />notes on morphology-habitat relations and moss abundance of the 16 taxa are provided and a key for the<br />identification of the mosses known at present from the study area based on gametophytic characters is<br />constructed.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Production of salt tolerant embryos and cytological changes associated with tolerance in microspores of oilseed rape911011245710.21608/taec.2001.12457ENMagedZakiLaboratory of Plant Biotechnology, Institute for Efficient Productivity,
University of Zagazig, Zagazig, EgyptSaharTawabDepartment of Botany, Faculty of Science, College for Girls, University of Ain Shams, Cairo, Egypt.Journal Article20000707Experiments 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.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Detarioxylon aegyptiacum (Leguminosae), from Lower Miocene marine sediments in Southern Sinai.1031141245810.21608/taec.2001.12458ENMarwahKamal-El-DinBotany Department, Faculty of Science
Ain Shams University, Cairo, Egypt.AhmedRefaatGeology Department, Faculty of Science
Cairo University, Giza, Egypt.Journal Article20010426The petrified wood Detarioxylon aegyptiacum (Unger) Louvet & Boureau, Leguminosae, is new to Sinai. It<br />is reported embedded in Rudeis Formation at Lower Miocene beds of Gebel Hadahid.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Floristic composition and zonation of seaweeds on Zabargad Reef (Red Sea, Egypt)1151341245910.21608/taec.2001.12459ENIslamEl-ManawyBotany Dept., Fac. of Science, Suez Canal UniversityJournal Article20010307Composition, dominance, distribution and zonation of seaweeds were investigated, using line-transect technique,<br />in three sites of varied water activity on Zabargad reef during November 1994. Fifty-four taxa included 16 green,<br />13 brown and 25 red macroalgae were identified, adding four new records for the Red Sea. The flora appears<br />rich and diverse, composed of filamentous, turf-forming, fleshy sac, foliose, erect shoot, and coralline forms. It<br />showed a geographic distribution pattern similar to that of the Indo-Pacific.<br />The seaweed vegetation appears heterogeneous, having a dissimilar construction at each side of the<br />reef. It showed a conspicuous zonation, revealing six zones related in general to reef topography, water<br />movement and in a lesser extent to grazing and nutrient enrichment. The intertidal zone had a marked reduced<br />flora due to exposure to air during low tide, and mobility of coral sand. Reef flat was the richest in species<br />composition and dominance, as it lies in a shallow, well-illuminated, and less fluctuated subtidal region. Peculiar<br />was the presence of high species dominance in strong surf on the windward reef crest. The reason for this is that<br />the crest is extensively eroded, rich in crevices and fissures within which the algae hideaway from wave action.<br />Moreover, strong rhizoids, dwarfing of thalli, crustose morphologies, growing in adherent to substrata were<br />some modifications allowing algae to persist in strong surf.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Papyrus and Papyrus–like paper sheets, their quality in relation to anatomical features1351411246010.21608/taec.2001.12460ENNahedWalyHerbarium, Botany Department
Faculty of Science, Giza 12613, Egypt.Journal Article20010320Papyrus and papyrus-like paper sheet were fabricated from the culms of sedges, rushes, and grasses and the leaf<br />blades of banana The characters and quality of the manufactured paper sheets are discussed in relation to the<br />cellular structure of the relevant plant organs used for the production of paper sheets. The best and good qualities<br />of paper sheets are those manufactured from culms consisting of high amounts of cellulose element including<br />parenchyma aerenchyma. The moderate and lower qualities of paper sheets comprise, in addition to cellulosic<br />elements, higher amounts of lignified elements including fibreCairo University Herbarium (CAI)Taeckholmia1110-741321120011201Pollen Atlas of the Flora of Egypt. 2. Species of Polygonaceae*1431511246110.21608/taec.2001.12461ENSalahEl NaggarBotany Department, Faculty of Science,
Assiut University.NahedEl-HusseiniThe Herbarium – Botany Department, Faculty of Science,
Cairo University, Giza, Egypt.Journal Article20010308Pollen grains of 20 species belonging to 7 genera of Polygonaceae represented in the Flora were studied using<br />Light and Scanning Electron Microscope. Pollen characters, including those of size, shape, exine sculpture and<br />structure of the aperture allowed the recognition of five pollen types: Atraphaxixs, Calligonum-Oxygonum,<br />Persicaria, Polygonum and Rumex-Emex types. A key for the seperation of the different types is provided and<br />the pollen morphology in relation to taxonomy of the investigated taxa is briefly discussed.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Floral morphology of certain species of the Papilionaceae with a special reference to stamen adelphy1531721246210.21608/taec.2001.12462ENAbd El-SalamAl- NowaihiBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.KarimaHamedBotany department, Faculty of Science Ain Shams University, Cairo – EgyptMagdyMouradBotany department, Faculty of Science Ain Shams University, Cairo – EgyptJournal Article20010108The floral morphology of the three papilionaceous species: Ononis vaginalis Vahl , Dolichos lablab L. and<br />Crotalaria aegyptiaca Benth. was studied to trace the organ vascularization. Vascular complexes to the sepals,<br />the petals and the stamens were recorded in the three species. Three cases of stamen adelphy were met with viz.<br />monadelphy, diadelphy and pseudomonadelphy. In the latter case a basal fenestration in the staminal tube exists<br />as an access to successful insect pollination. A foliar nature was determined for the nectary disc where present.<br />In the three species the carpel is supplied by the basic number; one dorsal and two ventral traces.Cairo University Herbarium (CAI)Taeckholmia1110-741321120011201Our present knowledge of the bryoflora of United Arab Emirates1731861246310.21608/taec.2001.12463ENWagiehEl- SaadawiBotany Department, Faculty of Science,
Ain Shams University, Cairo, Egypt.HanaaShabbaraBotany Department, Faculty of Science,
Ain Shams University.Cairo-Egypt.Journal Article20010930Seventeen, out of 29 mosses, and two hepatics, recently collected from the United Arab Emirates<br />(UAE), are new records for the country and the total number of bryophytes is raised to 61 entities (51<br />mosses & 10 hepatics). Eight mosses are new records to the whole Arabian Peninsula including three<br />mosses which are new records to South-West Asia. Habitats and distribution of the 31 collected taxa<br />are given together with an artificial key to all recorded mosses.