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Journal articles on the topic 'Anabaena'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Rosales Loaiza, Néstor, Patricia Vera, Cateryna Aiello-Mazzarri, and Ever Morales. "COMPARATIVE GROWTH AND BIOCHEMICAL COMPOSITION OF FOUR STRAINS OF Nostoc AND Anabaena (CYANOBACTERIA, NOSTOCALES) IN RELATION TO SODIUM NITRATE." Acta Biológica Colombiana 21, no. 2 (2016): 347–54. http://dx.doi.org/10.15446/abc.v21n2.48883.

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<p>Nitrogen concentration is an essential parameter in cyanobacterial cultures to produce enriched biomass with agricultural purposes. Growth and biochemical composition of Nostoc LAUN0015,Nostoc UAM206, Anabaena sp.1 and Anabaena sp.2 was compared at 0, 4.25, 8.5 and 17 mM NaNO3. Cultures under laboratory conditions were maintained for 30 days at a volume of 500 mL. Anabaenasp.1 yielded the highest value of dry mass of 0.26 ± 2.49 mg mL-1 at 8.5 mM NaNO3. For chlorophyll, phycocyanin and phycoerythrin were achieved maximum values at 17 mM NaNO3 with 18.09 ± 1.74, 102.90 ± 6.73 and 53.47

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2

Plazinski, Jacek, Lynn Croft, Rona Taylor, Qi Zheng, Barry G. Rolfe, and Brian E. S. Gunning. "Indigenous plasmids in Anabaena azollae: their taxonomic distribution and existence of regions of homology with symbiotic genes of Rhizobium." Canadian Journal of Microbiology 37, no. 3 (1991): 171–81. http://dx.doi.org/10.1139/m91-027.

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The method of horizontal agarose gel electrophoresis was used to demonstrate the presence of indigenous plasmid DNAs in different isolates of the symbiotic cyanobacterium Anabaena azollae. All isolates extracted from seven distinct species of the host fern Azolla were found to possess one to three cryptic plasmids ranging in sizes from 35 to 100 MDa (million daltons). Anabaenas isolated from Azolla caroliniana, Az. nilotica, and Az. pinnata species contained a single plasmid band of molecular mass approximately 60 MDa, whereas other endosymbiotic cyanobacteria extracted from Azolla filiculoide

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3

Matz, Carlyn J., Michael R. Christensen, Auralee D. Bone, Courtney D. Gress, Scott B. Widenmaier, and Harold G. Weger. "Only iron-limited cells of the cyanobacterium Anabaena flos-aquae inhibit growth of the green alga Chlamydomonas reinhardtii." Canadian Journal of Botany 82, no. 4 (2004): 436–42. http://dx.doi.org/10.1139/b04-022.

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Cocultivation of iron-limited cells of the cyanobacterium Anabaena flos-aquae (Lyng.) Brèb. and the green alga Chlamydomonas reinhardtii Dangeard resulted in growth of Anabaena but not Chlamydomonas, even in the presence of excess exogenous iron. This effect was also observed during the cultivation of Chlamydomonas in a medium in which iron-limited Anabaena cells had been growing, but were removed prior to culture of Chlamydomonas. Conversely, iron-limited Chlamydomonas cells grew very well in medium from iron (nutrient)-sufficient, phosphate-limited, and nitrogen-limited Anabaena cultures. Ir

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4

Rajopadhyaya, Ritu, Sangita Joshi, Sabitri Shrestha, and Shiva Kumar Raj. "Some New and Interesting Cyanobacteria from Baghjhoda Pond, Eastern Nepal." Himalayan Journal of Science and Technology 1 (December 1, 2017): 1–8. http://dx.doi.org/10.3126/hijost.v1i0.25814.

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Cyanobacteria of BaghJhoda pond in three different seasons hav been studied. A total of 8 cyanophycean algae under 6 genera viz., Anabaena, Aphanocapsa, Chroococcus, Oscillatoria, Phormidium and Spirulina were recorded. Anabaena, Oscillatoria and Phormidium were dominant genera and occurred in all three seasons. All the 8 taxa were new for the study area and Anabaena affinis and Anabaena subcylindrical were new records for Nepal.

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5

Patil, Keerthi, and Doris M. Singh. "OPTIMIZATION OF CULTURE MEDIA FOR THE GROWTH OF ANABAENA PCC550, ANABAENA PCC 574, AND CYLINDROSPERMUM PCC518, CYLINDROSPERMUM PCC 567." Journal of Advanced Scientific Research 13, no. 06 (2022): 106–10. http://dx.doi.org/10.55218/jasr.202213619.

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In the present study, Anabaena PCC550, Anabaena PCC574 and Cylindrospermum PCC518, Cylindrospermum PCC 567 have been subjected to 7 different inorganic culture media. In order to identify the best growth medium i.e.; optimized medium, the nutrient requirement of these two algae have been evaluated as prime requisite. The present investigation analyzed the growth of wet biomass of the four microalgae. In order to attain optimal growth of Anabaena and Cylindrospermum species, the 7 culture media employed in the current study were (i) BG11 medium (ii) Knoops medium (iii) Cyanophycean agar medium

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6

Peters, G. A., D. Kaplan, and H. E. Calvert. "Solar-powered N2 fixation in ferns: the Azolla-Anabaena symbioses." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 86 (1985): 169–77. http://dx.doi.org/10.1017/s0269727000008101.

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SynopsisThe heterosporous aquatic ferns in the genus Azolla contain a heterocystous cyanobacterium, Anabaena azollae, as a symbiont. The Anabaena occupies cavities formed in the aerial dorsal leaf lobes of the ferns and can provide the symbiotic associations with their total N requirement via the fixation of atmospheric nitrogen. The photosynthetic pigments of the fern and cyanobacterium are complementary. Photosynthesis is of course the source of energy for growth and the ultimate source of the ATP and reductant required for N2 fixation in the light or dark. However, nitrogen fixation is maxi

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7

Chen, Pei-Chung. "Physiology of Nitrogen Fixation in Two New Strains of Anabaena." Zeitschrift für Naturforschung C 40, no. 5-6 (1985): 406–8. http://dx.doi.org/10.1515/znc-1985-5-620.

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Abstract Two different cyanobacteria, Anabaena CH 1 and CH2, were isolated from Taiwan paddy soils. Both strains can grow well with daily dilution method. Anabaena CH1 shows a blue-green color and Anabaena CH2 a green brownish one. Nitrogenase activity decreased as cultures were transferred from light to dark. When a darkened culture was placed again into the light, nitrogenase activity recovered within two hours, but not in the presence of chloramphenicol. Energy supply for nitrogenase within both strains was different. Nitrogenase activity of Anabaena CH1 was light-dependent and oxygen in he

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8

Qian, Kuimei, Martin Dokulil, and Yuwei Chen. "Do the regular annual extreme water level changes affect the seasonal appearance of Anabaena in Poyang Lake?" PeerJ 7 (April 12, 2019): e6608. http://dx.doi.org/10.7717/peerj.6608.

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Background Poyang Lake is an ecosystem experiencing annual variations in water level of up to 14 m. Water level changes were 8.03 and 11.22 m, respectively, in the years 2013 and 2014. The biomass and heterocyst frequency of Anabaena increased in the summers of recent years. Methods A weekly to bi-weekly monitoring from June to November 2013 and 2014 was set up to explain the variations of Anabaena appearance in different phases of the water level. Results Anabaena was present in the lake throughout the year. The average relative biomass of Anabaena in the present study was over 40%, being mos

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9

Liengen, Turid. "Environmental factors influencing the nitrogen fixation activity of free-living terrestrial cyanobacteria from a high arctic area, Spitsbergen." Canadian Journal of Microbiology 45, no. 7 (1999): 573–81. http://dx.doi.org/10.1139/w99-040.

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The influence of environmental factors on the nitrogen fixation activity of free-living, terrestrial cyanobacteria from a high arctic area were investigated using experimental manipulations with two different types of field samples, including macroscopic sheets of Nostoc commune and soil samples with a cyanobacterial crust from a Puccinellia salt marsh. In addition, a cultured Anabaena sp. previously isolated from the salt marsh was examined. Nitrogen fixation activity was measured using the acetylene reduction method. The nitrogen fixation mainly took place in the light, but even after 12 h i

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10

Vaishyaa, J., and Appavoo Meline Sheela. "Methane Emission Reduction Coupled with Yield Increase in Paddy (Oryza sativa L.) Crop Inoculated with Anabaena sp. – A Closed Chamber Study." International Journal of Current Microbiology and Applied Sciences 13, no. 5 (2024): 83–89. http://dx.doi.org/10.20546/ijcmas.2024.1305.012.

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The study's objective was to find out how Cyanobacterium Anabaena sp. helps to improve rice crop development and lower methane emissions. Different dosages of urea were added to the paddy plant cultivated in a closed chamber after it was injected with Anabaena sp. A gas chromatograph was used to measure the amount of methane that the plant released as it reached maturity. Anabaena sp.'s impact on plant growth and yield was noted concurrently. Methane emissions from paddy plants grown with 25% urea and 75% Anabaena sp. (T4) ranged from a minimum of 20 mg plant-1 season-1 to a maximum of 80 mg p

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11

Kirjakov, Ivan Kirilov, and Katya Naneva Velichkova. "A new cyanobacterial species of Anabaena genus (Nostocales, Cyanobacteria) from Bulgaria." Anales de Biología, no. 38 (May 17, 2016): 69–72. http://dx.doi.org/10.6018/analesbio.38.06.

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Se describe una nueva especie del género de Cyanobacterias, Anabaena Bory ex Born. et Flah. (Nostocales) de las montañas Ródope de Bulgaria. Anabaena rhodopensis sp. nova. tiene acinetas con paredes celulares esculpidas. Se dan los datos biométricos para el tamaño de las células vegetativas, heterocistos y acinetos.A new species of cyanobacterial genus Anabaena Bory ex Born. et Flah. (Nostocales) from Rhodope Mountains in Bulgaria is described. Anabaena rhodopensis sp. nova. has akinetes with sculptured cell walls. Biometrical data for size of vegetative cells, heterocytes and akinetes are giv

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12

Halinen, Katrianna, Jouni Jokela, David P. Fewer, Matti Wahlsten, and Kaarina Sivonen. "Direct Evidence for Production of Microcystins by Anabaena Strains from the Baltic Sea." Applied and Environmental Microbiology 73, no. 20 (2007): 6543–50. http://dx.doi.org/10.1128/aem.01377-07.

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ABSTRACT Anabaena is a filamentous, N2-fixing, and morphologically diverse genus of cyanobacteria found in freshwater and brackish water environments worldwide. It contributes to the formation of toxic blooms in freshwater bodies through the production of a range of hepatotoxins or neurotoxins. In the Baltic Sea, Anabaena spp. form late summer blooms, together with Nodularia spumigena and Aphanizomenon flos-aquae. It has been long suspected that Baltic Sea Anabaena may produce microcystins. The presence of microcystins has been reported for the coastal regions of the Baltic proper, and a recen

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13

Du, Jian Fen, Yu Lin Tang, and Qian Li. "The Effect of Nano-ZnO on the Photosynthetic Capacity and Survival of Anabaena sp. and M. aeruginosa." Advanced Materials Research 1073-1076 (December 2014): 77–80. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.77.

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Anabaena sp. and M. aeruginosa were used to examine the toxic mechanism of nanoZnO to them, as well as the toxicity. Typical chlorophyll fluorescence parameters, including effective quantum yield, photosynthetic efficiency and maximum electron transport rate, were measured by a pulse amplitude modulated fluorometer. Results showed that nanoZnO could inhibit Anabaena sp. and M.aeruginosa growth with the EC50 (concentration for 50% of maximal effect) of 0.74±0.01 and 1.68±0.01 mg/L respectively. The toxicity of nanoZnO to Anabaena sp. is higher than that to M.aeruginosa, which can be proved by t

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14

Chow-Fraser, Patricia, and W. Gary Sprules. "Inhibitory effect of Anabaena sp. on in situ filtering rate of Daphnia." Canadian Journal of Zoology 64, no. 9 (1986): 1831–34. http://dx.doi.org/10.1139/z86-273.

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We found that in situ filtering rates of Daphnia spp. measured in a lake containing Anabaena were significantly lower than those measured in a filament-free lake. Even after accounting for the depressing effects of high nannoplankton biomass concentration, filtering rates in the lake with Anabaena were 64% lower than those from the filament-free lake. We also found that filtering rates for Daphnia pulex in laboratory experiments were lower when Anabaena was present in experimental beakers than when Chlorella was present. When Anabaena was removed from Three Mile Lake water, filtering rates com

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15

ISLAM, M. S., M. M. GOLDAR, M. G. MORSHED, H. B. M. BAKHT, M. S. ISLAM, and D. A. SACK. "Chemotaxis between Vibrio cholerae O1 and a blue-green alga, Anabaena sp." Epidemiology and Infection 134, no. 3 (2005): 645–48. http://dx.doi.org/10.1017/s0950268805005297.

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The chemotactic response of Vibrio cholerae O1 towards the mucilaginous sheath of Anabaena sp. was investigated by capillary tube method using a virulent strain of V. cholerae O1, El Tor, Ogawa (3083-T) and its isogenic mutant (HAP-1-T) that lacks the hap gene, which codes for mucinase (HA/protease). Homogenates of Anabaena sp. and purified mucin were used in this study as chemoattractants. Results showed 5·7% bacterial accumulation of wild-type V. cholerae O1 towards 4% homogenates of Anabaena sp. whereas, its mutant (hap−) showed 2·9% accumulation after 90 min. The higher percentage of attra

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16

Rajaniemi, Pirjo, Pavel Hrouzek, Klára Kaštovská, et al. "Phylogenetic and morphological evaluation of the genera Anabaena, Aphanizomenon, Trichormus and Nostoc (Nostocales, Cyanobacteria)." International Journal of Systematic and Evolutionary Microbiology 55, no. 1 (2005): 11–26. http://dx.doi.org/10.1099/ijs.0.63276-0.

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The heterocytous cyanobacteria form a monophyletic group according to 16S rRNA gene sequence data. Within this group, phylogenetic and morphological studies have shown that genera such as Anabaena and Aphanizomenon are intermixed. Moreover, the phylogeny of the genus Trichormus, which was recently separated from Anabaena, has not been investigated. The aim was to study the taxonomy of the genera Anabaena, Aphanizomenon, Nostoc and Trichormus belonging to the family Nostocaceae (subsection IV.I) by morphological and phylogenetic analyses of 16S rRNA gene, rpoB and rbcLX sequences. New strains w

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17

Mishbach, Imam, Nila Suci Permatasari, M. Zainuri, Hermin Pancasakti Kusumaningrum, and Endah Dwi Hastuti. "Potensi Mikroalga Anabaena sp. Sebagai Bahan Utama Bioetanol." EKOTONIA: Jurnal Penelitian Biologi, Botani, Zoologi dan Mikrobiologi 7, no. 1 (2022): 69–76. http://dx.doi.org/10.33019/ekotonia.v7i1.3144.

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Bioethanol is an energy source that can be used to reduce the use of fossil fuels. It has some advantages such as biodegradable, and non-toxic because the main ingredients come from biomass and produce fewer pollutants. Anabaena sp. is Cyanobacteria that can be used as the main ingredient of bioethanol, its advantages are that it does not compete with food, its growth is fast and it contains carbohydrates. The purpose of this study was to analyze the carbohydrate content of Anabaena sp. The stages of the research carried out were Anabaena sp. cultivated for 30 days in freshwater using Walne me

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Dong, Yanzhen, Zebin Tian, Xiaoyan Li, Dayong Xu, and Binghui Zheng. "Driving Factors and Variability of Cyanobacterial Blooms in Qionghai Lake, Yunnan–Guizhou Plateau, China." Water 17, no. 2 (2025): 169. https://doi.org/10.3390/w17020169.

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Qionghai Lake is an important freshwater source in the Yunnan–Guizhou Plateau. However, cyanobacterial blooms have been observed recently in Qionghai Lake, but their formation mechanism and control management are not well understood. Herein, phytoplankton, zooplankton, eutrophication, nutrients, and biochemical indices were measured in Qionghai Lake from May 2022 to April 2023. The results showed that cyanobacterial blooms in Qionghai Lake predominated in Anabaena sp. with a density of 1.11 × 107–18.87 × 107 cells/L. Anabaena blooms started in the northwestern area of Qionghai Lake in November

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Wang, Kangjie, Beijuan Hu, Chuangang Zheng, et al. "Application of Anabaena azotica- and Chlorella pyrenoidosa-Based Algal Biotechnology in Green Production of Algae-Rich Crataegi fructus." Journal of Healthcare Engineering 2022 (March 30, 2022): 1–7. http://dx.doi.org/10.1155/2022/8424890.

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Nitrogen-fixing Anabaena and Chlorella pyrenoidosa algal biotechnology are known as new agricultural inputs due to their characteristics and are widely used in the field of agricultural planting. This paper discusses the application of algal biotechnology based on nitrogen-fixing Anabaena sp. The advantages of algal biotechnology based on nitrogen-fixing Anabaena and Chlorella pyrenoidosa in terms of yield, sugar content, polyunsaturated fatty acid content, and high-quality yield of hawthorn were compared.

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Mahendra, Himawan Akbar, Intan Supraba, Budi Kamulyan, and Eko Agus Suyono. "Eksplorasi Peran Reactive Oxygen Species (ROS) yang diinduksi oleh Ekstrak Caesalpinia Sappan untuk Air yang Terkontaminasi Anabaena sp." Bioscientist : Jurnal Ilmiah Biologi 13, no. 1 (2025): 492. https://doi.org/10.33394/bioscientist.v13i1.14756.

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This study aims toexplore the reduction of Anabaena sp. populations using Caesalpinia sappan extract, aiming to determine the optimal concentration to induce oxidative stress that weakens cell structures via increased production of Reactive Oxygen Species (ROS). Water quality parameterssuch as color, turbidity, and Total Dissolved Solids (TDS)were analyzed to evaluate the extract's effectiveness on the aquatic ecosystem. Employing a combination of the TRIZ (Theory of Inventive Problem Solving) method and a True Experimental design, the study optimized extract concentration variations and exami

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Ballal, Anand, Marc Bramkamp, Hema Rajaram, Petra Zimmann, Shree Kumar Apte, and Karlheinz Altendorf. "An Atypical KdpD Homologue from the Cyanobacterium Anabaena sp. Strain L-31: Cloning, In Vivo Expression, and Interaction with Escherichia coli KdpD-CTD." Journal of Bacteriology 187, no. 14 (2005): 4921–27. http://dx.doi.org/10.1128/jb.187.14.4921-4927.2005.

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ABSTRACT The kdpFABC operon of Escherichia coli, coding for the high-affinity K+ transport system KdpFABC, is transcriptionally regulated by the products of the adjacently located kdpDE genes. The KdpD protein is a membrane-bound sensor kinase consisting of a large N-terminal domain and a C-terminal transmitter domain interconnected by four transmembrane segments (the transmembrane segments together with the C-terminal transmitter domain of KdpD are referred to as CTD), while KdpE is a cytosolic response regulator. We have cloned and sequenced the kdp operon from a nitrogen-fixing, filamentous

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Fiedler, Gabriele, Alicia M. Muro-Pastor, Enrique Flores, and Iris Maldener. "NtcA-Dependent Expression of the devBCAOperon, Encoding a Heterocyst-Specific ATP-Binding Cassette Transporter in Anabaena spp." Journal of Bacteriology 183, no. 12 (2001): 3795–99. http://dx.doi.org/10.1128/jb.183.12.3795-3799.2001.

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ABSTRACT The devBCA operon, encoding subunits of an ATP-binding cassette exporter, is essential for differentiation of N2-fixing heterocysts in Anabaena spp. Nitrogen deficiency-dependent transcription of the operon and the use of its transcriptional start point, located 762 (Anabaena variabilis strain ATCC 29413-FD) or 704 (Anabaena sp. strain PCC 7120) bp upstream of the translation start site, were found to require the global nitrogen transcriptional regulator NtcA. Furthermore, NtcA was shown to bind in vitro to the promoter ofdevBCA.

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Meeks, John C., Nisan A. Steinberg, Carol S. Enderlin, Cecillia M. Joseph, and Gerald A. Peters. "Azolla-Anabaena Relationship." Plant Physiology 84, no. 3 (1987): 883–86. http://dx.doi.org/10.1104/pp.84.3.883.

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Agnihotri, Vijai K. "Anabaena flos-aquae." Critical Reviews in Environmental Science and Technology 44, no. 18 (2014): 1995–2037. http://dx.doi.org/10.1080/10643389.2013.803797.

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25

Vaitomaa, Jaana, Anne Rantala, Katrianna Halinen, et al. "Quantitative Real-Time PCR for Determination of Microcystin Synthetase E Copy Numbers for Microcystis and Anabaena in Lakes." Applied and Environmental Microbiology 69, no. 12 (2003): 7289–97. http://dx.doi.org/10.1128/aem.69.12.7289-7297.2003.

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ABSTRACT Cyanobacterial mass occurrences in freshwater lakes are generally formed by Anabaena, Microcystis, and Planktothrix, which may produce cyclic heptapeptide hepatotoxins, microcystins. Thus far, identification of the most potent microcystin producer in a lake has not been possible due to a lack of quantitative methods. The aim of this study was to identify the microcystin-producing genera and to determine the copy numbers of microcystin synthetase gene E (mcyE) in Lake Tuusulanjärvi and Lake Hiidenvesi in Finland by quantitative real-time PCR. The microcystin concentrations and cyanoba

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Bataeva, Yu V., M. A. Sinetova, E. A. Kurashov, J. V. Krylova, L. V. Kolombet, and L. N. Grigoryan. "Characterization of biological activity and evaluation of exogenous metabolites of cyanobacteria “<i>Anabaena</i>” sp. IPPAS B-2020." Microbiology 93, no. 5 (2024): 519–33. https://doi.org/10.31857/s0026365624050026.

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Culture of cyanobacteria “Anabaena” sp. isolated from alluvial meadow soils in the south of Russia and deposited in the collection of cultures of microalgae and cyanobacteria IPPAS of the Institute of Plant Physiology named after. K.A. Timiryazev RAS under the number IPPAS B-2020. Phylogenetic analysis showed that the studied strain belongs to a clade that unites the genera Sphaerospermopsis, Amphiheterocytum, Raphidiopsis, Wollea and Neowollea, but cannot currently be assigned to any of them. The phytotoxicity, fungicidal and antioxidant activities of the strain were studied. The culture turn

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Galmozzi, Carla V., Lorena Saelices, Francisco J. Florencio, and M. Isabel Muro-Pastor. "Posttranscriptional Regulation of Glutamine Synthetase in the Filamentous Cyanobacterium Anabaena sp. PCC 7120: Differential Expression between Vegetative Cells and Heterocysts." Journal of Bacteriology 192, no. 18 (2010): 4701–11. http://dx.doi.org/10.1128/jb.00222-10.

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ABSTRACT Genes homologous to those implicated in glutamine synthetase (GS) regulation by protein-protein interaction in the cyanobacterium Synechocystis sp. strain PCC 6803 are conserved in several cyanobacterial sequenced genomes. We investigated this GS regulatory mechanism in Anabaena sp. strain PCC 7120. In this strain the system operates with only one GS inactivation factor (inactivation factor 7A [IF7A]), encoded by open reading frame (ORF) asl2329 (gifA). Following addition of ammonium, expression of gifA is derepressed, leading to the synthesis of IF7A, and consequently, GS is inactiva

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Chaurasia, Akhilesh Kumar, and Shree Kumar Apte. "Overexpression of the groESL Operon Enhances the Heat and Salinity Stress Tolerance of the Nitrogen-Fixing Cyanobacterium Anabaena sp. Strain PCC7120." Applied and Environmental Microbiology 75, no. 18 (2009): 6008–12. http://dx.doi.org/10.1128/aem.00838-09.

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ABSTRACT The bicistronic groESL operon, encoding the Hsp60 and Hsp10 chaperonins, was cloned into an integrative expression vector, pFPN, and incorporated at an innocuous site in the Anabaena sp. strain PCC7120 genome. In the recombinant Anabaena strain, the additional groESL operon was expressed from a strong cyanobacterial P psbA1 promoter without hampering the stress-responsive expression of the native groESL operon. The net expression of the two groESL operons promoted better growth, supported the vital activities of nitrogen fixation and photosynthesis at ambient conditions, and enhanced

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De Nobel, W. T. (Pim), N. Staats, and L. R. Mur. "Competition between nitrogen-fixing cyanobacteria during phosphorus-limited growth." Water Science and Technology 32, no. 4 (1995): 99–101. http://dx.doi.org/10.2166/wst.1995.0170.

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The phosphorus-limited growth of cultures of the nitrogen-fixing cyanobacteria Aphanizomenon and Anabaena was investigated. In conditions of nutrient and light excess Anabaena has a competitive advantage. The lower the light intensity conditions at which Aphanizomenon populations dominate are indicated for future study.

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Parthiban, Jeevitha, and Ranjitha Jambulingam. "Enhancing the Biodiesel Production Potential of Synechococcus elongatus and Anabaena Cyanobacterial Strain Isolated from Saline Water Using Different Media Composition and Organic Carbon Sources." Sustainability 15, no. 1 (2023): 870. http://dx.doi.org/10.3390/su15010870.

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In the present study, Synechococcus elongatus and Anabaena, two cyanobacterial species were cultured using different media conditions such as ASN III, modified ASN III, BG-11, and BBM for the enrichment of biomass and lipid productivity. The experimental result clearly shows that BG 11 was the efficient and cost-effective medium for both the isolated cyanobacterial species such as Synechococcus elongatus and Anabaena. The influence of organic carbon sources on biomass and lipid productivity of the selected cyanobacterial species were studied when cultivated in a BG-11 medium using different or

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Jones, Gary J., and Wolfgang Korth. "In situ production of volatile odour compounds by river and reservoir phytoplankton populations in Australia." Water Science and Technology 31, no. 11 (1995): 145–51. http://dx.doi.org/10.2166/wst.1995.0424.

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The production of volatile odour compounds by freshwater phytoplankton was monitored weekly from November to April (summer period) 1990/91 at two sites: (1) Hay Weir pool on the Murrumbidgee River, NSW and (2) Carcoar Dam, near Blayney, NSW. During this period, the phytoplankton of the Murrumbidgee River was dominated by two species of the diatom Melosira, and the cyanobacterium Anabaena sp. Carcoar Dam was mostly dominated by the cyanobacteria Microcystis aeruginosa and Anabaena sp. The major odour compounds detected were geosmin, β-cyclocitral, β-ionone, geranylacetone, and 6-methylhept-5-en

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Ballal, Anand, and Shree K. Apte. "Differential Expression of the Two kdp Operons in the Nitrogen-Fixing Cyanobacterium Anabaena sp. Strain L-31." Applied and Environmental Microbiology 71, no. 9 (2005): 5297–303. http://dx.doi.org/10.1128/aem.71.9.5297-5303.2005.

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ABSTRACT In several types of bacteria, the Kdp ATPase (comprising of the KdpABC complex) is an inducible, high-affinity potassium transporter that scavenges K+ from the environment. The cyanobacterium Anabaena sp. strain L-31 showed the presence of not one but two distinct kdp operons in its genome. The kdp1 consisted of kdpA1B1G1C1D genes, whereas the kdp2 contained the kdpA2B2G2C2 genes. Among the regulatory genes, the kdpD open reading frame of Anabaena sp. strain L-31 was truncated compared to the kdpD of other bacteria, whereas a kdpE-like gene was absent in the vicinity of the two kdp op

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Islam, M. S., M. M. Goldar, M. G. Morshed, M. N. H. Khan, M. R. Islam, and R. B. Sack. "Involvement of thehapgene (mucinase) in the survival ofVibrio choleraeO1 in association with the blue-green alga,Anabaenasp." Canadian Journal of Microbiology 48, no. 9 (2002): 793–800. http://dx.doi.org/10.1139/w02-073.

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Mucinase is a soluble haemagglutinin protease, which may be important for the survival of Vibrio cholerae in association with mucilaginous blue-green algae (cyanobacteria). A comparative survival study was carried out with an Anabaena sp. and a wild-type V. cholerae O1 strain hap+gene (haemagglutinin-protease), together with its isogenic mutant hap (hap-deleted gene). A simple spread plate technique was followed to count culturable V. cholerae O1 on taurocholate tellurite gelatin agar plate. The fluorescent antibody technique of Kogure et al. (1979) was used for the microscopical viable count

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Serrano, A. "Purification, characterization and function of dihydrolipoamide dehydrogenase from the cyanobacterium Anabaena sp. strain P.C.C. 7119." Biochemical Journal 288, no. 3 (1992): 823–30. http://dx.doi.org/10.1042/bj2880823.

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A dihydrolipoamide dehydrogenase (dihydrolipoamide: NAD+ oxidoreductase, EC 1.8.1.4) (DLD) has been found in the soluble fraction of cells of both unicellular (Synechococcus sp. strain P.C.C. 6301) and filamentous (Calothrix sp. strain P.C.C. 7601 and Anabaena sp. strain P.C.C. 7119) cyanobacteria. DLD from Anabaena sp. was purified 3000-fold to electrophoretic homogeneity. The purified enzyme exhibited a specific activity of 190 units/mg and was characterized as a dimeric FAD-containing protein with a native molecular mass of 104 kDa, a Stokes' radius of 4.28 nm and a very acidic pI value of

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35

Mochimaru, Mari, Hajime Masukawa, Takashi Maoka, Hatem E. Mohamed, Wim F. J. Vermaas та Shinichi Takaichi. "Substrate Specificities and Availability of Fucosyltransferase and β-Carotene Hydroxylase for Myxol 2′-Fucoside Synthesis in Anabaena sp. Strain PCC 7120 Compared with Synechocystis sp. Strain PCC 6803". Journal of Bacteriology 190, № 20 (2008): 6726–33. http://dx.doi.org/10.1128/jb.01881-07.

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ABSTRACT To elucidate the biosynthetic pathways of carotenoids, especially myxol 2′-glycosides, in cyanobacteria, Anabaena sp. strain PCC 7120 (also known as Nostoc sp. strain PCC 7120) and Synechocystis sp. strain PCC 6803 deletion mutants lacking selected proposed carotenoid biosynthesis enzymes and GDP-fucose synthase (WcaG), which is required for myxol 2′-fucoside production, were analyzed. The carotenoids in these mutants were identified using high-performance liquid chromatography, field desorption mass spectrometry, and 1H nuclear magnetic resonance. The wcaG (all4826) deletion mutant o

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Liu, Jinxin, Qinghao Jin, Junfeng Geng, Jianxin Xia, Yanhong Wu, and Huiying Chen. "Fast Capture and Efficient Removal of Bloom Algae Based on Improved Dielectrophoresis Process." International Journal of Environmental Research and Public Health 20, no. 1 (2023): 832. http://dx.doi.org/10.3390/ijerph20010832.

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A dielectrophoresis (DEP) method for direct capture and fast removal of Anabaena was established in this work. The factors affecting the removal efficiency of Anabaena were investigated systematically, leading to optimized experimental conditions and improved DEP process equipment. The experimental results showed that our improved DEP method could directly capture Anabaena in eutrophic water with much enhanced removal efficiency of Anabaena from high-concentration algal bloom-eutrophication-simulated solution. The removal rate could increase by more than 20% after applying DEP at 15 V compared

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Pereira, Ana L., and Vitor Vasconcelos. "Classification and phylogeny of the cyanobiont Anabaena azollae Strasburger: an answered question?" International Journal of Systematic and Evolutionary Microbiology 64, Pt_6 (2014): 1830–40. http://dx.doi.org/10.1099/ijs.0.059238-0.

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The symbiosis Azolla–Anabaena azollae, with a worldwide distribution in pantropical and temperate regions, is one of the most studied, because of its potential application as a biofertilizer, especially in rice fields, but also as an animal food and in phytoremediation. The cyanobiont is a filamentous, heterocystic cyanobacterium that inhabits the foliar cavities of the pteridophyte and the indusium on the megasporocarp (female reproductive structure). The classification and phylogeny of the cyanobiont is very controversial: from its morphology, it has been named Nostoc azollae, Anabaena azoll

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van Hove, C., and A. Lejeune. "The Azolla: Anabaena Symbiosis." Biology and Environment: Proceedings of the Royal Irish Academy 102B, no. 1 (2002): 23–26. http://dx.doi.org/10.1353/bae.2002.0036.

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Golden, James W., and Ho-Sung Yoon. "Heterocyst formation in Anabaena." Current Opinion in Microbiology 1, no. 6 (1998): 623–29. http://dx.doi.org/10.1016/s1369-5274(98)80106-9.

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Golden, James W., and Ho-Sung Yoon. "Heterocyst development in Anabaena." Current Opinion in Microbiology 6, no. 6 (2003): 557–63. http://dx.doi.org/10.1016/j.mib.2003.10.004.

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Isono, Takahiro, and Tetzuya Katoh. "Subparticles of Anabaena phycobilisomes." Archives of Biochemistry and Biophysics 256, no. 1 (1987): 317–24. http://dx.doi.org/10.1016/0003-9861(87)90452-8.

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COSSAR, J. D., A. J. DARLING, S. M. IP, P. ROWELL, and W. D. P. STEWART. "Immunocytochemical Localization of Thioredoxins in the Cyanobacteria Anabaena cylindrica and Anabaena variabilis." Microbiology 131, no. 11 (1985): 3029–35. http://dx.doi.org/10.1099/00221287-131-11-3029.

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Koksharova, Olga A., and C. Peter Wolk. "Novel DNA-Binding Proteins in the Cyanobacterium Anabaena sp. Strain PCC 7120." Journal of Bacteriology 184, no. 14 (2002): 3931–40. http://dx.doi.org/10.1128/jb.184.14.3931-3940.2002.

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ABSTRACT As an approach towards elucidation of the biochemical regulation of the progression of heterocyst differentiation in Anabaena sp. strain PCC 7120, we have identified proteins that bind to a 150-bp sequence upstream from hepC, a gene that plays a role in the synthesis of heterocyst envelope polysaccharide. Such proteins were purified in four steps from extracts of vegetative cells of Anabaena sp. Two of these proteins (Abp1 and Abp2) are encoded by neighboring genes in the Anabaena sp. chromosome. The genes that encode the third (Abp3) and fourth (Abp4) proteins are situated at two oth

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Ge, Xin, Karen Cain, and Rona Hirschberg. "Urea metabolism and urease regulation in the cyanobacterium Anabaena variabilis." Canadian Journal of Microbiology 36, no. 3 (1990): 218–22. http://dx.doi.org/10.1139/m90-037.

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Anabaena variabilis can use urea as a nitrogen source, which it breaks down via the action of urease. No evidence of urea amidolyase activity was found. Urease synthesis is constitutive; no major difference in enzyme levels was found when cultures were grown with urea, ammonia, or N2. Urea is not required for urease synthesis, and ammonia does not repress urease synthesis. However, urea does repress nitrogenase synthesis at the transcription level, probably by the same mechanism as ammonia. Anabaena variabilis urease is inhibited by phenylphosphorodiamidate, hydroxyurea, and acetohydroxamic ac

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Al-Tebrineh, Jamal, Troco Kaan Mihali, Francesco Pomati, and Brett A. Neilan. "Detection of Saxitoxin-Producing Cyanobacteria and Anabaena circinalis in Environmental Water Blooms by Quantitative PCR." Applied and Environmental Microbiology 76, no. 23 (2010): 7836–42. http://dx.doi.org/10.1128/aem.00174-10.

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ABSTRACT Saxitoxins (STXs) are carbamate alkaloid neurotoxins produced by marine “red tide” dinoflagellates and several species of freshwater filamentous cyanobacteria, including Anabaena circinalis, Aphanizomenon spp., Lyngbya wollei, and Cylindrospermopsis raciborskii. A specific quantitative PCR (qPCR) method based on SYBR green chemistry was developed to quantify saxitoxin-producing Anabaena circinalis cyanobacteria, which are major bloom-forming freshwater cyanobacteria. The aim of this study was to infer the potential toxigenicity of samples by determining the copy number of a unique and

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Österholm, Julia, Rafael V. Popin, David P. Fewer, and Kaarina Sivonen. "Phylogenomic Analysis of Secondary Metabolism in the Toxic Cyanobacterial Genera Anabaena, Dolichospermum and Aphanizomenon." Toxins 12, no. 4 (2020): 248. http://dx.doi.org/10.3390/toxins12040248.

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Cyanobacteria produce an array of toxins that pose serious health risks to humans and animals. The closely related diazotrophic genera, Anabaena, Dolichospermum and Aphanizomenon, frequently form poisonous blooms in lakes and brackish waters around the world. These genera form a complex now termed the Anabaena, Dolichospermum and Aphanizomenon (ADA) clade and produce a greater array of toxins than any other cyanobacteria group. However, taxonomic confusion masks the distribution of toxin biosynthetic pathways in cyanobacteria. Here we obtained 11 new draft genomes to improve the understanding

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Sevilla, Emma, Cristina Sarasa-Buisan, Andrï¿½s Gonzï¿½lez, et al. "Regulation by FurC in Anabaena Links the Oxidative Stress Response to Photosynthetic Metabolism." Plant and Cell Physiology 60, no. 8 (2019): 1778–89. http://dx.doi.org/10.1093/pcp/pcz094.

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Abstract The FUR (Ferric Uptake Regulator) family in Anabaena sp. PCC 7120 consists of three paralogs named FurA (Fur), FurB (Zur) and FurC (PerR). furC seems to be an essential gene in the filamentous nitrogen-fixing strain Anabaena sp. PCC 7120, suggesting that it plays a fundamental role in this organism. In order to better understand the functions of FurC in Anabaena, the phenotype of a derivative strain that overexpresses this regulator (EB2770FurC) has been characterized. The furC-overexpressing variant presented alterations in growth rate, morphology and ultrastructure, as well as highe

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Banerjee, Manisha, Dhiman Chakravarty, and Anand Ballal. "Molecular basis of function and the unusual antioxidant activity of a cyanobacterial cysteine desulfurase." Biochemical Journal 474, no. 14 (2017): 2435–47. http://dx.doi.org/10.1042/bcj20170290.

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Cysteine desulfurases, which supply sulfur for iron–sulfur cluster biogenesis, are broadly distributed in all phyla including cyanobacteria, the progenitors of plant chloroplasts. The SUF (sulfur utilization factor) system is responsible for Fe–S cluster biosynthesis under stress. The suf operon from cyanobacterium Anabaena PCC 7120 showed the presence of a cysteine desulfurase, sufS (alr2495), but not the accessory sulfur-accepting protein (SufE). However, an open reading frame (alr3513) encoding a SufE-like protein (termed AsaE, Anabaena sulfur acceptor E) was found at a location distinct fr

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Sklenar, K. S., and A. J. Horne. "Horizontal Distribution of Geosmin in a Reservoir before and after Copper Treatment." Water Science and Technology 40, no. 6 (1999): 229–37. http://dx.doi.org/10.2166/wst.1999.0303.

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Extracellular geosmin, chlorophyll a, and Anabaena circinalis filament density were measured at several stations on the surface of Lake Perris, a 1.62 × 108 m3 (131,450 acre-ft) reservoir in southern California, before and after the reservoir was treated with copper sulfate. Samples were collected from 22 stations within three hours the day before copper was applied by helicopter to the reservoir, which was undergoing an odorous Anabaena bloom. The day after the copper application, 19 stations were sampled over the same short period of time to see how the copper application affected parameter

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50

Swapnil, Prashant, Mukesh Meena, and Ashwani K. Rai. "Molecular interaction of nitrate transporter proteins with recombinant glycinebetaine results in efficient nitrate uptake in the cyanobacterium Anabaena PCC 7120." PLOS ONE 16, no. 11 (2021): e0257870. http://dx.doi.org/10.1371/journal.pone.0257870.

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Nitrate transport in cyanobacteria is mediated by ABC-transporter, which consists of a highly conserved ATP binding cassette (ABC) and a less conserved transmembrane domain (TMD). Under salt stress, recombinant glycinebetaine (GB) not only protected the rate of nitrate transport in transgenic Anabaena PCC 7120, rather stimulated the rate by interacting with the ABC-transporter proteins. In silico analyses revealed that nrtA protein consisted of 427 amino acids, the majority of which were hydrophobic and contained a Tat (twin-arginine translocation) signal profile of 34 amino acids (1–34). The

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