Journal ArticleDOI
β-N-Methylamino-L-alanine exposure alters defense against oxidative stress in aquatic plants Lomariopsis lineata, Fontinalis antipyretica, Riccia fluitans and Taxiphyllum barbieri.
TLDR
Four different aquatic plants were tested for their capacity to absorb the neurotoxin β-N-Methylamino-L-alanine from water and thus their possible applicability in a "Green Liver System", and Bryophytes turned out to be most effective in cleaning the water from this cyanobacterial toxin.About:
This article is published in Ecotoxicology and Environmental Safety.The article was published on 2013-02-01. It has received 21 citations till now. The article focuses on the topics: Riccia fluitans & Fontinalis antipyretica.read more
Citations
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Journal ArticleDOI
BMAA Inhibits Nitrogen Fixation in the Cyanobacterium Nostoc sp. PCC 7120
TL;DR: The data show that exogenously applied BMAA rapidly inhibits nitrogenase activity (acetylene reduction assay), even at micromolar concentrations, and that the inhibition was considerably more severe than that induced by combined nitrogen sources and most other amino acids.
Journal ArticleDOI
β-N-methylamino-L-alanine (BMAA) uptake by the animal model, Daphnia magna and subsequent oxidative stress.
TL;DR: BMAA inhibited the oxidative stress defence and biotransformation enzymes within 24-h exposure in the tested Daphnia and could therefore impair the oxidant status and the capability of detoxifying other substances in D. magna.
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The metabolism of the non-proteinogenic amino acid β-N-methylamino-L-alanine (BMAA) in the cyanobacterium Synechocystis PCC6803
Simoné Downing,T.G. Downing +1 more
TL;DR: Data presented here show that exogenous BMAA is readily metabolised by cyanobacteria during which, the primary amino group is rapidly transferred to other cellular amino acids, and suggest thatBMAA is metabolised in cyanob bacteria via a reversible transamination reaction.
Journal ArticleDOI
Uptake of a cyanotoxin, β-N-methylamino-l-alanine, by wheat (Triticum aestivum)
TL;DR: In order to study the uptake of the cyanobacterial neurotoxin β-N-methylamino-l-alanine into the crop plant Triticum aestivum during germination and primary growth imbibed grains and 7-day-old seedlings were irrigated with 100 and 1000µg l(-1) BMAA for 4 days and 100µG l(- 1) BM AA for 28 days.
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The effect of oxytetracycline on physiological and enzymatic defense responses in aquatic plant species Egeria densa, Azolla caroliniana, and Taxiphyllum barbieri.
TL;DR: It can be concluded that oxytetracycline does not provoke physiological damage to the tested species within 24 h of exposure, Nevertheless, the antioxidant defense mechanism was activated.
References
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A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding
TL;DR: This assay is very reproducible and rapid with the dye binding process virtually complete in approximately 2 min with good color stability for 1 hr with little or no interference from cations such as sodium or potassium nor from carbohydrates such as sucrose.
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Glutathione S-transferases. The first enzymatic step in mercapturic acid formation.
TL;DR: The purification of homogeneous glutathione S-transferases B and C from rat liver is described, and only transferases A and C are immunologically related.
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Diverse taxa of cyanobacteria produce β-N-methylamino-l-alanine, a neurotoxic amino acid
Paul Alan Cox,Sandra Anne Banack,Susan J. Murch,Ulla Rasmussen,Georgia Tien,Robert R. Bidigare,James S. Metcalf,Louise F. Morrison,Geoffrey A. Codd,Birgitta Bergman +9 more
TL;DR: It is reported here that a single neurotoxin, beta-N-methylamino-L-alanine, may be produced by all known groups of cyanobacteria, including cyanobacterial symbionts and free-living cyanob bacteria.
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Identification of an enzymatically formed glutathione conjugate of the cyanobacterial hepatotoxin microcystin-LR: the first step of detoxication.
Stephan Pflugmacher,Claudia Wiegand,Axel Oberemm,Kenneth A. Beattie,Eberhard Krause,Geoffrey A. Codd,Christian E. W. Steinberg +6 more
TL;DR: The present study shows the existence of a microcystin-LR glutathione conjugate formed enzymatically via soluble glutATHione S-transferase in various aquatic organisms and appears to be the first step in the detoxication of a cyanobacterial toxin in aquatic organisms.
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The inadequacy of first-order treatment wetland models
TL;DR: In this paper, a test wetland simulation is used to provide simulations of different experimental and design protocols, such as transect measurements and I/O data from parallel and sequential detention time studies.