Relevant bibliographies by topics / Limnothrix

Academic literature on the topic 'Limnothrix'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Limnothrix"

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Zhu, Mengling, Gongliang Yu, Xiaochuang Li, Wenhua Tan, and Renhui Li. "Taxonomic and phylogenetic evaluation of Limnothrix strains (Oscillatoriales, Cyanobacteria) by adding Limnothrix planktonica strains isolated from central China." Hydrobiologia 698, no. 1 (May 16, 2012): 367–74. http://dx.doi.org/10.1007/s10750-012-1127-8.

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Kim, Ye-Ri, Jeong-Mi Do, Kyung Hee Kim, Alexandra R. Stoica, Seung-Woo Jo, Un-Kyung Kim, and Ho-Sung Yoon. "C-phycocyanin from Limnothrix Species KNUA002 Alleviates Cisplatin-Induced Ototoxicity by Blocking the Mitochondrial Apoptotic Pathway in Auditory Cells." Marine Drugs 17, no. 4 (April 19, 2019): 235. http://dx.doi.org/10.3390/md17040235.

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Ototoxicity, or adverse pharmacological effects on the inner ear or auditory nerve, is a common side effect of cisplatin, a platinum-based drug widely used in anticancer chemotherapy. Although the incidence of ototoxicity is high among patients that receive cisplatin therapy, there is currently no effective treatment for it. The generation of excessive reactive oxygen species (ROS) is considered to be the major cause of cisplatin-induced ototoxicity. C-phycocyanin (C-PC), a blue phycobiliprotein found in cyanobacteria and red algae, has antioxidant and anticancer activities in different experimental models in vitro and in vivo. Thus, we tested the ability of C-PC from Limnothrix sp. KNUA002 to protect auditory cells from cisplatin-induced ototoxicity in vitro. Pretreatment with C-PC from Limnothrix sp. KNUA002 inhibited apoptosis and protected mitochondrial function by preventing ROS accumulation in cisplatin-treated House Ear Institute-Organ of Corti 1 (HEI-OC1) cells, a mouse auditory cell line. Cisplatin increased the expression of Bax and reduced the expression of Bcl-2, which activate and inhibit, respectively, the mitochondrial apoptotic pathway in response to oxidative stress. Pretreatment with C-PC prior to cisplatin treatment caused the Bax and Bcl-2 levels to stay close to the levels in untreated control cells. Our results suggest that C-PC from Limnothrix sp. KNUA002 protects cells against cisplatin-induced cytotoxicity by inhibiting the mitochondrial apoptotic pathway.
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Meffert, Maria-Elisabeth. "Biotope selection of Limnothrix rosea (UTERMÖHL) MEFFERT (Cyanophyceae)." Archiv für Hydrobiologie 117, no. 2 (December 20, 1989): 129–39. http://dx.doi.org/10.1127/archiv-hydrobiol/117/1989/129.

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Romanov, R. E. "Limnothrix redeckei (Van Goor) Meffert (Cyanoprocaryota) in the potamoplankton." International Journal on Algae 9, no. 2 (2007): 105–16. http://dx.doi.org/10.1615/interjalgae.v9.i2.10.

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Ott, Ingmar, Peeter Nõges, Reet Laugaste, and Toomas Kõrv. "Occurrence of Limnothrix redekei Van Goor in Estonian lakes." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 109 (August 1, 2003): 455–68. http://dx.doi.org/10.1127/1864-1318/2003/0109-0455.

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DE OLIVEIRA, ELANE D. CUNHA, ALAN C. DA CUNHA, NATALINA B. DA SILVA, RAQUEL CASTELO-BRANCO, JOÃO MORAIS, MARIA PAULA C. SCHNEIDER, SILVIA M. M. FAUSTINO, VITOR RAMOS, and VITOR VASCONCELOS. "Morphological and molecular characterization of cyanobacterial isolates from the mouth of the Amazon River." Phytotaxa 387, no. 4 (January 11, 2019): 269. http://dx.doi.org/10.11646/phytotaxa.387.4.1.

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The Amazon region contains a great diversity of species, and the Amazon River basin accounts for almost 20% of all the freshwater in the world. Despite the favorable environmental conditions in this region, little is known about the cyanobacterial diversity of this waterbody, especially at the mouth of the river. In this paper, we used the polyphasic approach to identify 14 cyanobacterial strains isolated in the Amazon River on the inlet site from a drinking water supply located close to the river mouth. The isolated strains were characterized based on morphology, behavior in culture, 16S rRNA gene sequencing, phylogenetic analysis and potential for toxin production. The isolated strains belong to seven different genera, namely, Alkalinema, Cephalothrix, Limnothrix, Leptolyngbya, Phormidium, Pseudanabaena and an unidentified Nostocales taxa that may represent a new genus. Strikingly, there were no new species, nor detection of gene clusters associated with cyanotoxin production. However, the phylogenetic placements of the Amazonian strains of Limnothrix and Pseudanabaena provide new insight into the taxonomy of these genera, reinforcing the need for taxonomic revision.
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Meffert, Maria-Elisabeth. "In situ and in vitro photosynthesis of Limnothrix redekei (Cyanophyta)." Archiv für Hydrobiologie 116, no. 4 (October 16, 1989): 401–14. http://dx.doi.org/10.1127/archiv-hydrobiol/116/1989/401.

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Yu, Gongliang, Mengling Zhu, Youxin Chen, Qianqian Pan, Wenbo Chai, and Renhui Li. "Polyphasic characterization of four species of Pseudanabaena (Oscillatoriales, Cyanobacteria) from China and insights into polyphyletic divergence within the Pseudanabaena genus." Phytotaxa 192, no. 1 (January 7, 2015): 1. http://dx.doi.org/10.11646/phytotaxa.192.1.1.

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Current cyanobacterial taxonomic studies are mainly performed through polyphasic characterization at the genus and/or species levels. In this study, eleven Pseudanabaena strains isolated in China were taxonomically and phylogenetically evaluated by investigating several characteristics, including morphological features, cellular ultrastructures, pigment composition, and 16S rRNA gene sequences. The strains were identified as four morphospecies, namely, Pseudanabaena mucicola, P. galeata, P. limnetica, and P. minima. The cellular ultrastructures of these species showed that peripheral thylakoids with 4‒8 parallel layers were parietally distributed. Phylogenetic results based on 16S rRNA gene sequences indicated that most of the Pseudanabaena strains used in this study, including the eleven from China and three Pseudanabaena catenata strains from GenBank, gathered into one large cluster that represents the core of the genus Pseudanabaena. Several Pseudanabaena species/strains that represent different extreme environments were phylogenetically located outside the main stream cluster and should be removed under the genus Pseudanabaena on the basis of the role of the main stream species. Limnothrix strains were divided into two clades, and the taxonomic solution for these clades was discussed. This study is the first to report on the morphology and phylogeny of Pseudanabaena species in China, providing new insights into the taxonomy of the genera Pseudanabaena and Limnothrix.
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Xiangling, Liu, Han Ying, Zhao Yijun, and Cheng Kai. "A novel freshwater cyanophage with a complex collar infects Limnothrix planktonica." Phycologia 54, no. 6 (November 2015): 578–82. http://dx.doi.org/10.2216/15-82.1.

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Noronha, Judith M., Manguesh U. Gauns, and Sanjeev C. Ghadi. "Isolation of a novel cyanophage infecting potentially bloom-forming Limnothrix sp." Limnologica 93 (March 2022): 125961. http://dx.doi.org/10.1016/j.limno.2022.125961.

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Dissertations / Theses on the topic "Limnothrix"

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Shatwell, Tom. "Interactive effects of nutrients and physical factors on phytoplankton growth." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/16877.

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Phytoplanktonarten unterscheiden sich in ihren Ansprüchen hinsichtlich Ressourcen wie Nährstoffe, Licht und andere physikalische Faktoren. Wechselwirkungen zwischen Nährstoffen und physikalischen Faktoren beeinflussen daher die Artenzusammensetzung einer Phytoplanktongemeinschaft. In der vorliegenden Arbeit wurde der Einfluss von Temperatur und Photoperiode auf das Phytoplanktonwachstum in Abhängigkeit vom Lichtregime und dem Angebot an Phosphor (P) und Silizium (Si) untersucht. Hierfür wurden Wachstums- und Konkurrenzexperimente unter Laborverhältnissen mit Stephanodiscus minutulus, Nitzschia acicularis (beides Bacillariophyceae) und Limnothrix redekei (Cyanophyceae) durchgeführt, ein Modell der Faktorinteraktionen entwickelt sowie ökologische Langzeitdaten des Müggelsees (Berlin) statistisch ausgewertet. Die Effekte von Temperatur und Photoperiode auf die Wachstumsraten unterschieden sich nicht zwischen konstantem und fluktuierendem Licht. Die Auswirkungen der Photoperiode und der Lichtfluktuationen auf die Wachstumsraten waren hierbei additiv. Der Grad der Limitation der Wachstumsraten durch P oder Si wurde durch die Photoperiode nicht signifikant beeinflusst. Wechselwirkungen zwischen Temperatur und P oder Si waren hingegen komplex und artspezifisch. Unabhängig davon, ob die Wachstumsraten durch P, Si oder fluktuierendes Licht gesteuert wurden, war S. minutulus konkurrenzstärker bei niedrigeren Temperaturen und N. acicularis bei höheren Temperaturen. Zusammenfassend zeigen die Ergebnisse, dass die Faktorinteraktionstypen artspezifisch sind, die Adaptation der Arten widerspiegeln und so zur Nischen-Differenzierung beitragen. Kenntnisse dieser Wechselwirkungen fördern deshalb unser Verständnis der Phytoplanktondiversität und ermöglichen es, Reaktionen des Phytoplanktons auf Klimaerwärmung und Trophieveränderung, die mit einer Verschiebung der Verhältnisse zwischen Nährstoffen, Temperatur und Licht einhergehen, besser vorherzusagen.
Phytoplankton species have different resource requirements and different sensitivities to important growth factors. Interactions between nutrients and physical factors, such as temperature and light should therefore influence the species composition. Because these interactions are poorly understood, this study investigated the interactive effects of temperature and photoperiod on phytoplankton growth controlled by fluctuating light, phosphorus (P) and silicon (Si). Growth and competition experiments were performed in the laboratory on Stephanodiscus minutulus, Nitzschia acicularis (both Bacillariophyceae) and Limnothrix redekei (Cyanophyceae). A model of factor interactions was developed and long-term field data from Lake Müggelsee (Berlin) were statistically analysed. Temperature and photoperiod had the same influence on growth under fluctuating light as they did under constant light. The photoperiod and short term light fluctuations caused by mixing had additive effects on growth. P and Si interacted strongly with temperature with respect to growth, but less with the photoperiod. The Droop relation fitted to S. minutulus but not N. acicularis. The Monod equation could not sufficiently account for non-steady dynamics of diatom growth under Si limitation, underestimating uptake rates and overestimating uptake affinity. Estimates based on the Monod model may therefore considerably underestimate the degree of Si limitation. The types of factor interactions were generally species-specific, reflected niche adaptation and enhanced niche differentiation. Interactions between nutrients and physical factors are relevant to growth during spring and contribute to the phytoplankton composition. Understanding the interactions should improve our knowledge of phytoplankton diversity and increase our ability to predict phytoplankton response to climate and trophic change, which shift the relationship between nutrients, temperature and light.
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Whan, Paul Michael. "Investigation of a novel toxin produced by a Limnothrix cyanobacteria." Thesis, 2016. http://hdl.handle.net/2440/103621.

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Limnothrix is a common genera of cyanobacteria that has previously shown very limited evidence as a producer of toxic metabolites. Recently, a species of Limnothrix cyanobacteria has been shown to be the producer of an unusual cyanobacterial toxin (the toxin suppresses cellular ATP production and inhibits protein synthesis). The identity of the Limnothrix toxin has not been previously characterised. An investigation into the isolation and identification of the toxic molecule produced by the Limnothrix cyanobacteria was the focus of this work. Limnothrix "AC0243" cyanobacteria were cultured and harvested to produce cyanobacterial extracts containing the Limnothrix toxin. A protein synthesis inhibition bioassay utilising rabbit reticulocyte lysate was validated in this work as a means of guiding fractionation of the Limnothrix toxin. Some physical properties of the Limnothrix toxin were investigated; the properties were approximate molecular mass, approximate temperature stability, solubility and decomposition upon exposure to acidic or basic pH solutions. The cyanobacterial extract containing Limnothrix toxin was concentrated utilising solid phase extraction methodology; the solid phase extraction was performed on a variety of stationary phases but only diol-capped and ZICHILIC phases were able to demonstrate concentration of the Limnothrix toxin. Translation of the solid phase extraction methods using the diolcapped and ZIC-HILIC phases to a high performance liquid chromatography method was attempted. The translation was ultimately unsuccessful, but the investigation provided further information on the Limnothrix toxin. Limnothrix toxin demonstrated a very high affinity for polar stationary phases (e.g. silica, diol-capped silica, cyano-capped silica) when the mobile phase was at acidic pH; the high affinity was investigated to determine whether it would impact on concentration and purification of Limnothrix toxin. The effectiveness of chromatographic partitioning performed on the diol-capped and ZIC-HILIC stationary phases was analysed using mass spectrometry. The analysis was performed by examination of the population of total ion current profiles from fractions produced by the chromatographic methods employed. Solid phase extraction methods showed some evidence of partitioning while high performance liquid chromatography methods showed minimal evidence of partitioning or recovery of the active component. Ultimately the Limnothrix toxin proved difficult to purify or characterise, however it was able to be concentrated by means of diol-capped solid phase extraction. Some recommendations for risk assessment in relation to the Limnothrix toxin are provided based on the evidence gathered during this project.
Thesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 2016.
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(9790628), Olivia Daniels. "Autecology, allelopathy and toxicity of Limnothrix (strain AC0243): Multiple-organism studies using laboratory cultures." Thesis, 2016. https://figshare.com/articles/thesis/Autecology_allelopathy_and_toxicity_of_Limnothrix_strain_AC0243_Multiple-organism_studies_using_laboratory_cultures/13405466.

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This study examines the growth, allelopathy and toxicity of laboratory cultures of the cyanobacterium Limnothrix (strain AC0243). Key findings of the research show evidence that this strain demonstrates ecological plasticity and should be considered as a potentially dangerous invasive species. General observations of the strain under normal (non-experimental) conditions showed extensive plasticity in terms of colony morphology. These forms included floating and non-floating ‘ball’ colonies, well structured colonies attached to the tissue culture flasks, sheets of intertwined trichomes loosely attached to the flasks or planktonic masses. No specific trigger could be attributed to the changes in morphology. Trials were performed to determine if allelopathy occurred between some species of microfungi and Limnothrix (strain AC0243), both of which are commonly recovered from the same niche. The results of these experiments suggested symbiotic or commensual relationships with Fusarium species and Acremonium species but not Cladosporium sphaerospermum. Cladosporium sphaerospermum inhibited growth of the cyanobacterium, although no allelopathy occurred, as determined by the lack of inhibition zones surrounding the colony. Allelopathy occurred when Limnothrix (strain AC0243) was grown Page 5 of 312 with ‘self’ inoculum, suggesting a quorum sensing mediated recognition of antagonism.

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Book chapters on the topic "Limnothrix"

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Zhu, Mengling, Gongliang Yu, Xiaochuang Li, Wenhua Tan, and Renhui Li. "Taxonomic and phylogenetic evaluation of Limnothrix strains (Oscillatoriales, Cyanobacteria) by adding Limnothrix planktonica strains isolated from central China." In Phytoplankton responses to human impacts at different scales, 367–74. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5790-5_26.

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Rücker, Jacqueline, Claudia Wiedner, and Paul Zippel. "Factors controlling the dominance of Planktothrix agardhii and Limnothrix redekei in eutrophic shallow lakes." In Shallow Lakes ’95, 107–15. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5648-6_12.

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Meffert, Maria-Elisabeth. "Relations between Limnothrix redekei (Cyanophyta/Cyanobacteria) and Bacteria: Mutual Control of Growth by Extracellular Algal Products." In Ecological Studies, 217–28. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4612-2606-2_10.

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Rojo, C., and M. Alvarez Cobelas. "Population dynamics of Limnothrix redekei, Oscillatoria lanceaeformis, Planktothrix agardhii and Pseudanabaena limnetica (cyanobacteria) in a shallow hypertrophic lake (Spain)." In Nutrient Dynamics and Biological Structure in Shallow Freshwater and Brackish Lakes, 165–71. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-2460-9_14.

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