The Egyptian Phycological SocietyEgyptian Journal of Phycology1110-864919120181230PRODUCTION OF ALGAL GROWTH PROMOTERS AND STUDYING THEIR EFFECTS ON MAIZE CROP12211599110.21608/egyjs.2018.115991ENEman M.MaaroufBotany Department, Faculty of Science, Ain Shams University, Cairo, Egypt.Ahmed A.El AwamriBotany Department, Faculty of Science, Ain Shams University, Cairo, Egypt.Reda M.El ShahatMicrobiology Department, Soils; Water and Environment Research Institute, Agriculture Research Center, Giza, Egypt.Azza A.Abdel AalMicrobiology Department, Soils; Water and Environment Research Institute, Agriculture Research Center, Giza, Egypt.Journal Article20180405Plant growth promoters were estimated in three cyanobacterial strains (<em>Anabaena azollae </em>Strasburger, <em>Spirulina platensis </em>Geitler and <em>Nostoc muscorum </em>C. Agardh in the presence of potassium nitrate, sodium chloride and tryptophan, with different concentrations. The highest concentrations of IAA and GA<sub>3</sub> were determined and applied to Maize that was planted in soil with EC (5.4). Cyanobacterial treatments were applied three times throughout the cultivation period of Maize. Mineral fertilization was applied according to the guidelines of the Egyptian Ministry of Agriculture, with 100% to control, and 75% to all other treatments. Final results showed that the highest yield was obtained by treating Maize with (<em>Spirulina platensis</em> with tryptophan, <em>Anabaena azollae </em>with both potassium nitrate and tryptophan) respectively. Those results were almost three times more than the control yield. It`s recommended for the yield improvement; to use the selected strains, especially in sandy and saline soils.https://egyjs.journals.ekb.eg/article_115991_a151c0f4e2ff1ce941d72c64beb4e30d.pdfThe Egyptian Phycological SocietyEgyptian Journal of Phycology1110-864919120181230The Effects of Sewage Water on Ultrastructure of Chlorella vulgaris and Scenedesmus quadricauda234611599410.21608/egyjs.2018.115994ENHanan A.SaidBotany Department, Faculty of Science, Fayoum UniversityRabea A.ShehabBiological and Geological Sciences Depart., Faculty of Education, Ain Shams University.Journal Article20180512The present work was carried out to study the effect of heavy metals from Collection station Mostorod Greater Cairo Egypt in <em>Chlorella vulgaris</em> and <em>Scenedesmus quadricauda</em> on amino acids content and ultrastructure. Results obtained revealed that the content of amino acids was increased gradually at all different concentrations of heavy metals (25%, 50%, 75% and 100%) compared to control. Cellular damage was studied by transmission electron microscope. It was observed that <em>Chlorella vulgaris</em> and <em>Scenedesmus quadricauda</em> when exposed to different concentrations of heavy metals revealed drastic changes in the overall ultrastructure such as the chloroplast separated far from the wall, the lamelly of the chloroplast appeared to be separated from each other, the pyrenoid disappeared and electro dense granular bodies identified as polyphosphate granules, appeared apparently in the cells. Damage to the algae ultrastructure was more severe with elevated heavy metal concentrations.These responses of <em>Chlorella vulgaris </em>and <em>Scenedesmus quadricauda</em> indicated their tolerance of heavy metal stress.https://egyjs.journals.ekb.eg/article_115994_9a818166e66de23f3a34c310fd90f9df.pdfThe Egyptian Phycological SocietyEgyptian Journal of Phycology1110-864919120181230PHYTOCHEMICAL SCREENING FOR ANTIBACTERIAL COMPOUNDS OF SOME SEAWEED FROM COASTAL AREA OF ABU-QIR, ALEXANDRIA, EGYPT475711600710.21608/egyjs.2018.116007ENGehad M. T.MorsyBotany and Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch)Elsayed Kh.BekhetBotany and Microbiology Department, Faculty of Science, Al-Azhar University (Assuit)Entesar A.MohamedBotany and Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch)Rawhya A.Salah El DinBotany and Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch)Journal Article20180721In this study, antibacterial activities of four seaweeds (<em>Pterocladia capillacea</em>, <em>Corallina mediterranea</em>, <em>Corallina officinalis</em>, and <em>Ulva lactuca</em>) collected from Abu-Qir, Alexandria, Egypt during summer 2016. Their methanol/chloroform extracts were tested against four Gram-positive bacteria (<em>Staphylococcus aureus</em>, <em>Staphylococcus epidermidis</em>, <em>Streptococcus</em> sp. and <em>Bacillus cereus</em>, and two Gram-negative bacteria (<em>Salmonella enterica, </em><em>P</em><em>roteus mirabilis</em>). The results revealed that the number of algal extracts inhibited <em>Bacillus cereus</em>. On the other hand, no effect was shown on <em>Proteus mirabilis</em>. The n-Hexadecanoic acid was a fatty acid which recorded as active compound in <em>Pterocladia capillacea</em> extract was characterized by GC-MS analysis.https://egyjs.journals.ekb.eg/article_116007_76bb64880b392dfa2b0b9a1f8754f153.pdfThe Egyptian Phycological SocietyEgyptian Journal of Phycology1110-864919120181230The impact of applying rice straw substrates on periphyton and plankton abundance and community composition597911600910.21608/egyjs.2018.116009ENNaglaa I. I.ShalabyCentral Lab. For Aquaculture Research, Abbassa, Abou-Hammad, Sharkia, Egypt, limnology department.Niema A. F.AlyCentral Lab. For Aquaculture Research, Abbassa, Abou-Hammad, Sharkia, Egypt, Fish Biology and Ecology departmentJournal Article20180911An experiment had been accomplished over a fish culture season which extended from May to December; to investigate the abundance, dynamics and community composition of both phyto and zoo plankton. Six earthen ponds each of 1000 m<sup>2</sup> volume and 1 m in depth were divided into two groups; the 1<sup>st</sup> one implemented as control (T<sub>1</sub>), while dry rice straw introduced to the ponds of the 2<sup>nd</sup> group (T<sub>2</sub>) in the rate of 45 g/m<sup>2</sup>. All ponds were fertilized with chicken manure in the rate of 15 kg/pond/week. All ponds received mono sex Nile tilapia fry in the rate of 3 fry/m<sup>2</sup>.Abundance, dynamics and community composition of both phyto and zooplankton were monthly detected. Obtained results revealed that the highest total phytoplankton count was during August, and that count in source water was lower than that in T<sub>1</sub> and T<sub>2</sub> treatments. The highest total zooplankton count in source water was at the beginning of the experiment during May, while the 1<sup>st</sup> achieved peaks of total zooplankton count in source water as well as in the two investigated treatments; were during August. Total zooplankton count in source water was higher than that in T<sub>1</sub> or T<sub>2</sub> treatments. Concerning phytoplankton community composition; Cyanophyta dominated other groups in source water, T<sub>1</sub> or in T<sub>2</sub> treatment, while with respect to periphyton community composition; Chlorophyta dominated other groups on rice straw mats, while copepods dominated the other zooplankton groups in source water and in the two investigated treatments. It's concluded that different management techniques, such as fertilization, type of cultivated species and applying substrates for periphyton growth, influenced the community composition of phyto and zooplankton as well as periphyton organisms. https://egyjs.journals.ekb.eg/article_116009_cfb897cd5906f8e9aa102fed1c2507d2.pdfThe Egyptian Phycological SocietyEgyptian Journal of Phycology1110-864919120181230Phytoplankton Species Composition and Physico-chemical Characteristics of Ismailia Canal, Egypt8110211601110.21608/egyjs.2018.116011ENAhmed Y. M.YusufBotany Department, Faculty of Science, Ain Shams University, Cairo, 11566, EgyptAmal I.SalehBotany Department, Faculty of Science, Ain Shams University, Cairo, 11566, EgyptHesham M.Abd El FatahBotany Department, Faculty of Science, Ain Shams University, Cairo, 11566, EgyptJournal Article20180929<span>Ismailia Canal is one of the main artificial branches of River Nile in Egypt, <span>it is the most important one as a source of water supply for several governorates in the east of Nile Delta</span>. In this study, phytoplankton composition and some physico- chemical parameters have been studied in twelve points along the main route of Ismailia canal between Cairo and Ismailia governorates to follow up changes in the water quality of the canal. Samples have been collected monthly in the period from February 2015 to January 2016. A total of 143 phytoplankton taxa related to 55 genera were identified related to six algal divisions namely; Chlorophyta (69 taxa), Bacillariophyta (51 taxa), Cyanophyta (18 taxa), Euglenophyta and Dinophyta (each represented by 2 taxa) and finally Xanthophyta represented by one taxon. Quantitatively, Bacillariophyta was the most dominant division with algal density represented more than 86% of average total phytoplankton count. The highest phytoplankton density was recorded in winter, while the minimum was recorded in summer. Water of Ismailia Canal was found to be slightly alkaline. Concentrations of nitrogen, phosphorus and silicate were found to be markedly affected by the water level of the canal along the year as well as the pollution runoff from ambient pollution sources. Phytoplankton composition of the canal also seems to be affected by pollutants especially at the far eastern part of the canal that located in Ismailia city. On the long run increasing of industrial and agricultural run-off may affect the water quality of the canal, so continuous studies must be carried out to follow up the changes in water of the canal.</span>https://egyjs.journals.ekb.eg/article_116011_a162a9e98500b1de8e4cc0e029e97967.pdf