Phytotoxicity and antioxidative enzymes of green microalga (Desmodesmus subspicatus) and duckweed (Lemna minor) exposed to herbicides MCPA, chloridazon and their mixtures

2012 ◽  
Vol 47 (8) ◽  
pp. 814-822 ◽  
Author(s):  
Joanna Bisewska ◽  
Emilia I. Sarnowska ◽  
Zbigniew H. Tukaj
Keyword(s):  
Antioxidative Enzymes ◽  
Lemna Minor ◽  
Desmodesmus Subspicatus ◽  
Green Microalga

scholarly journals Chlorophyll catabolites in conditioned media of green microalga Desmodesmus subspicatus

2015 ◽  
Vol 28 (2) ◽  
pp. 889-896 ◽  
Author(s):  
Krzysztof Grabski ◽  
Natalia Baranowski ◽  
Joanna Skórko-Glonek ◽  
Zbigniew Tukaj
Keyword(s):  
Conditioned Media ◽  
Desmodesmus Subspicatus ◽  
Green Microalga ◽  
Chlorophyll Catabolites

scholarly journals Assessment of acrylamide toxicity using a battery of standardised bioassays / Procjena toksičnosti akrilamida pomoću standardiziranih biotestova

2015 ◽  
Vol 66 (4) ◽  
pp. 315-321 ◽  
Author(s):  
Mira Zovko ◽  
Željka Vidaković-Cifrek ◽  
Želimira Cvetković ◽  
Jasna Bošnir ◽  
Sandra Šikić
Keyword(s):  
Daphnia Magna ◽  
Lemna Minor ◽  
Low Cost ◽  
Drinking Water Treatment ◽  
Pseudokirchneriella Subcapitata ◽  
Laboratory Animals ◽  
Freshwater Organisms ◽  
Desmodesmus Subspicatus ◽  
Class 1 ◽  
Increased Sensitivity

Acrylamide is a monomer widely used as an intermediate in the production of organic chemicals, e.g. polyacrylamides (PAMs). Since PAMs are low cost chemicals with applications in various industries and waste- and drinking water treatment, a certain amount of non-polymerised acrylamide is expected to end up in waterways. PAMs are non-toxic but acrylamide induces neurotoxic effects in humans and genotoxic, reproductive, and carcinogenic effects in laboratory animals. In order to evaluate the effect of acrylamide on freshwater organisms, bioassays were conducted on four species: algae Desmodesmus subspicatus and Pseudokirchneriella subcapitata, duckweed Lemna minor and water flea Daphnia magna according to ISO (International Organization for Standardisation) standardised methods. This approach ensures the evaluation of acrylamide toxicity on organisms with different levels of organisation and the comparability of results, and it examines the value of using a battery of low-cost standardised bioassays in the monitoring of pollution and contamination of aquatic ecosystems. These results showed that EC50 values were lower for Desmodesmus subspicatus and Pseudokirchneriella subcapitata than for Daphnia magna and Lemna minor, which suggests an increased sensitivity of algae to acrylamide. According to the toxic unit approach, the values estimated by the Lemna minor and Daphnia magna bioassays, classify acrylamide as slightly toxic (TU=0-1; Class 1). The results obtained from algal bioassays (Desmodesmus subspicatus and Pseudokirchneriella subcapitata) revealed the toxic effect of acrylamide (TU=1-10; Class 2) on these organisms.

scholarly journals Determination of the Ecotoxicity of Herbicides Roundup® Classic Pro and Garlon New in Aquatic and Terrestrial Environments

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1203
Author(s):  
Lucia Tajnaiová ◽  
Radek Vurm ◽  
Marina Kholomyeva ◽  
Miroslav Kobera ◽  
Vladimír Kočí
Keyword(s):  
Growth Inhibition ◽  
Active Substance ◽  
Lemna Minor ◽  
Algal Growth ◽  
Aquatic Organisms ◽  
Inhibitory Effect ◽  
Aminomethylphosphonic Acid ◽  
Desmodesmus Subspicatus ◽  
Terrestrial Environments ◽  
Agricultural Yields

Herbicides help increase agricultural yields significantly, but they may negatively impact the life of non-target organisms. Modifying the life cycle of primary producers can affect other organisms in the food chain, and consequently in the whole ecosystem. We investigated the effect of common herbicides Roundup® Classic Pro (active substance glyphosate) and Garlon New (triclopyr and fluroxypyr) on aquatic organisms duckweed Lemna minor and green algae Desmodesmus subspicatus, and on the enzymatic activity of soil. We also compared the effects of Roundup® Classic Pro to that of a metabolite of its active substance, aminomethylphosphonic acid (AMPA). The results of an algal growth test showed that AMPA has a 1.5× weaker inhibitory effect on the growth of D. subspicatus than the Roundup formula, and the strongest growth inhibition was caused by Garlon New (IC50Roundup = 267.3 µg/L, IC50Garlon = 21.0 µg/L, IC50AMPA = 117.8 mg/L). The results of the duckweed growth inhibition test revealed that Roundup and Garlon New caused 100% growth inhibition of L. minor even at significantly lower concentrations than the ready-to-use concentration. The total chlorophyll content in the fronds was lowest when Garlon New was used. The highest dehydrogenase activity was observed in soil treated with Garlon New, and the lowest in soil treated with Roundup® Classic Pro. The results of this study showed that all three tested substances were ecotoxic to the tested organisms.

Toxicity of wood leachate to algae Desmodesmus subspicatus and plant Lemna minor

2021 ◽  
Author(s):  
Lyndon N.A. Sackey ◽  
Klára A. Mocová ◽  
Šárka Petrová ◽  
Vladimír Kočí
Keyword(s):  
Lemna Minor ◽  
Desmodesmus Subspicatus

scholarly journals Ecotoxicological Effect of Aged Wood Leachates to Aquatic Organisms

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2091
Author(s):  
Lyndon N. A. Sackey ◽  
Klára A. Mocová ◽  
Vladimír Kočí
Keyword(s):  
Lemna Minor ◽  
Oxygen Demand ◽  
Aquatic Organisms ◽  
Eastern Region ◽  
Cedrela Odorata ◽  
Forest Reserve ◽  
Desmodesmus Subspicatus ◽  
Test Organisms ◽  
Ecotoxicological Effect

Wood is an important natural resource used for various human activities. Toxicity of wood leachate in aquatic organisms has been previously established, but whether storage over time has an impact on the quality of leachate has not been assessed. Hence, this research seeks to assess the toxicity of aged wood leachate in aquatic organisms. Five fresh wood samples were randomly selected from the Oboyow forest reserve in the eastern region of Ghana: Mahogany (Khaya ivorensis), Cedrela (Cedrela odorata), Emire (Terminalia ivorensis), Wawa (Triplochiton scleroxylon), and Ceiba (Ceiba pendandra) to assess their toxicity to aquatic organisms. Algal (Desmodesmus subspicatus) duckweed (Lemna minor) and daphnia (Daphnia magna) were carried out using exposures to concentrations of 20%, 30%, 45%, 67%, and 100% v/v of wood leachate with control media, because they represented various concentration rate levels of wood leachate toxicity in the test organisms. The toxicity of the various wood leachates might be due to high levels of biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total organic carbon (TOC), i.e., metals and phenols. The % IC50 of the various wood leachate ranged from 21.51–66.77% with mahogany exhibiting the highest toxicity and wawa the lowest. It was also observed that toxicity of wood leachates decreased as the wood leachate aged. The % IC50 showed both confirmed and potential toxicity among the various wood leachates.

Plant growth biostimulant activity of the green microalga Desmodesmus subspicatus

2021 ◽  
Vol 59 ◽  
pp. 102434
Author(s):  
Ester Mazepa ◽  
Barbara V. Malburg ◽  
Gilda Mógor ◽  
Amanda C. de Oliveira ◽  
Juliana O. Amatussi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Desmodesmus Subspicatus ◽  
Green Microalga

Low temperature x-ray microanalysis of frozen-hydrated tobacco leaves

1984 ◽  
Vol 42 ◽  
pp. 284-285
Author(s):  
S. Edith Taylor ◽  
Patrick Echlin ◽  
May McKoon ◽  
Thomas L. Hayes
Keyword(s):  
Low Temperature ◽  
Lemna Minor ◽  
Root Tips ◽  
Tobacco Leaves ◽  
X Ray ◽  
Whole Cells ◽  
Carbon Coated ◽  
The Right ◽  
Beam Currents ◽  
The University

Low temperature x-ray microanalysis (LTXM) of solid biological materials has been documented for Lemna minor L. root tips. This discussion will be limited to a demonstration of LTXM for measuring relative elemental distributions of P,S,Cl and K species within whole cells of tobacco leaves.Mature Wisconsin-38 tobacco was grown in the greenhouse at the University of California, Berkeley and picked daily from the mid-stalk position (leaf #9). The tissue was excised from the right of the mid rib and rapidly frozen in liquid nitrogen slush. It was then placed into an Amray biochamber and maintained at 103K. Fracture faces of the tissue were prepared and carbon-coated in the biochamber. The prepared sample was transferred from the biochamber to the Amray 1000A SEM equipped with a cold stage to maintain low temperatures at 103K. Analyses were performed using a tungsten source with accelerating voltages of 17.5 to 20 KV and beam currents from 1-2nA.

Sign in / Sign up

Export Citation Format

Share Document