Laboratory experiments were conducted to evaluate effects of Microcystis aeruginosa on population variations, male and resting-eggs production of two Daphnia species, D. carinata and D. pulex.The male and population densities of the two Daphnia dropped with the increase of Microcystis biomass.
High-throughput sequencing was applied to analyze the effects of toxic Microcystis aeruginosa on the silver carp Hypophthalmichthys molitrix.
emend. What is microcystin? M. aeruginosa produces potent hepatotoxins (microcystins) that specifically inhibit eukaryotic protein phosphatase types 1 and 2A and cause hepatocellular carcinoma (21, 26, 48).Hence, M. aeruginosa blooms are often responsible for the … Microcystins (MCs) are the most commonly encountered cyanotoxins.
A clear increase in cyanophage abundance was observed when M. aeruginosa numbers declined, showing that these factors were significantly negatively correlated. The importance of nitrogen (N) versus phosphorus (P) in explaining total cyanobacterial biovolume, the biovolume of specific cyanobacterial taxa, and the incidence of cyanotoxins was determined for 102 north German lakes, using methods to separate the effects of joint variation in N and P concentration from those of differential variation in N versus P. A DNA microarray based on the genome of M. aeruginosa PCC 7806 was constructed and … High-throughput sequencing was applied to analyze the effects of toxic Microcystis aeruginosa on the silver carp Hypophthalmichthys molitrix. Introduction. The general structure of microcystins is cyclo( d -alanine 1 -X 2 - d -MeAsp 3 -Z 4 -Adda 5 - d -glutamate 6 -Mdha 7 ), in which X and Z are variable l -amino acids, d -MeAsp 3 is d - erythro -ß-methyl aspartic acid, and Mdha is N -methyldehydroalanine ( Figure 1 ).
The contents of the three microcystis powder were 1.07 µg/mg, 4.70 µg/mg, 0.47 µg/mg, respectively. RNA-seq revealed that the liver tissue contained 105,379 unigenes. Cyanobacteria of pharmacological and toxicological significance include the genera Anabaena, Oscillatoria, Microcystis, Nodularia, Cylindrospermopsis, and Lyngbya.
emend. Previous work on carbon assimilation of algae (Moriarty and Moriarty, 1973) shows that Nile tilapia are able to digest and assimilate carbon from cyanobacteria of the genus Microcystis and Anabaena.
Many strains of Microcystis are known to produce cyanobacterial hepatotoxins called microcystins. Microcystis aeruginosa is a single-celled blue green alga, or cyanobacterium, that occurs naturally in surface waters.
The best known of these is the globally distributed Microcystis aeruginosa. They usually are too small to be seen, but sometimes can form visible colonies. … Microcystis can proliferate to form dense blooms and mats under certain conditions (see Figure 1). Cyanobacteria (blue-green algae): Cyanobacteria are bacteria that grow in water and are photosynthetic (use sunlight to create food and support life). 96-microbiological assay is a Cyanobacterial toxins have been shown to be hazardous to humans and animals via direct and indirect routes of exposure such as ingestion of and contact with contaminated water, vegetables, fish/shellfish and through irrigation practices. Combined treatment of toxic cyanobacteria Microcystis aeruginosa with hydrogen peroxide and microcystin biodegradation agents results in quick toxin elimination. The toxin, a soluble peptide, is lethal to many kinds of aquatic organisms and damages zooplankton, fish (), and the liver of higher animals (2, 22). In this study, microcystins (MCs) in Microcystis aeruginosa, and Daphnia magna exposed to M. aeruginosa, were analyzed by HPLC-MS, and the effects of M. aeruginosa on D. magna were investigated. The correlation of these gene fragments with microcystin biosynthesis could be drawn by genetic comparison of toxic and nontoxic strains of Microcystis and by insertional mutagenesis of one of the genes that ultimately led to a complete loss of microcystin production in M. aeruginosa PCC7806 (Dittmann et al., 1997). High-throughput sequencing was applied to analyze the effects of toxic Microcystis aeruginosa on the silver carp Hypophthalmichthys molitrix. The bloom of cyanobacterium Microcystis aeruginosa is a ubiquitous phenomenon in eutrophic lakes and reservoirs in many countries of the world. Many variants of these cyanobacteria produce multiple toxins, including the potent liver toxin, microcystin.
and Microcystis spp. A continuous culturing system (chemostat) made of metal-free materials was successfully developed and used to maintain Fe-limited cultures of Microcystis aeruginosa PCC7806 at nanomolar iron (Fe) concentrations (20 to 50 nM total Fe).
The harmful toxin responsible for the shutdown of Toledo’s water taps is on the rise, and experts suggest that farming and climate change may be to blame. Microcystis aeruginosa is a species of cyanobacteria.
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