Cu, Ni, and Zn effects on basic physiological and stress parameters of Raphidocelis subcapitata algae.

The submitted work observed Cu, Ni, and Zn effects on selected physiological and stress parameters of the alga Raphidocelis (Pseudokirchneriella) subcapitata. In 96-h experiments, EC50 values for algal specific growth rates (SGR) inhibition in Cu, Ni, and Zn presence were estimated as 0.15, 0.

Heavy Metals Induce Iron Deficiency Responses at Different Hierarchic and Regulatory Levels.

In plants, the excess of several heavy metals mimics iron (Fe) deficiency-induced chlorosis, indicating a disturbance in Fe homeostasis. To examine the level at which heavy metals interfere with Fe deficiency responses, we carried out an in-depth characterization of Fe-related physiological, regulatory, and morphological responses in Arabidopsis () exposed to heavy metals. Enhanced zinc (Zn) uptake closely mimicked Fe deficiency by leading to low chlorophyll but high ferric-chelate reductase activity and coumarin release.

Assessment of the suitability of phytotoxkit plastic vertical containers compared with petri dishes for standard seedling growth tests.

This study compares two cultivation methods (Petri dishes vs. Phytotoxkit containers; tap water vs. Knop's solution) for standard seedling growth tests.

Arsenic and selenium interactive effect on alga Desmodesmus quadricauda.

Substances known to be toxic in one-component solutions often exhibit unexpected effects when present in mixtures. Only a few efforts have been made to assess the effect of As-Se mixture in algae or plants in general. Due to the lack of information on this topic, the aim of this study was to examine the As-Se interactive effect in the alga species Desmodesmus quadricauda.

Changes in physiological activity of algae Desmodesmus quadricauda after active bioaccumulation of newly prepared and characterized Fe(III) complexes with pyridine-3-carboxamide (pca) by living algal cells.

The study characterized five iron(III) complexes with heterocyclic N-donor ligand pyridine-3-carboxamide (pca) [FeCl(3)(pca)(3)], [Fe(H(2)O)(2)(pca)(3)](ClO(4))(3), [Fe(2)O(ac)(2)(pca)(6)]Cl(2).3H(2)O, [Fe(NO(3))(3)(pca)(3)].3H(2)O, [Fe(Cl(2)ac)(3)(pca)(3)] (ac=acetate, Cl(2)ac=dichloroacetate) and their effects on biomass, chlorophylls (a, b), photosynthetic oxygen production and iron biosorption in algae Desmodesmus quadricauda.

Se(IV) phytotoxicity for monocotyledonae cereals (Hordeum vulgare L., Triticum aestivum L.) and dicotyledonae crops (Sinapis alba L., Brassica napus L.).

The phytotoxicity of Se(IV) was determined through root and shoot growth inhibition, biomass (dry (DM), fresh (FM)) production, water content, photosynthetic pigment (chlorophyll a, chlorophyll b and carotenoids) levels and Se accumulation in the roots and shoots. The sensitivities of monocotyledonae (Hordeum vulgare, Triticum aestivum) and dicotyledonae plants (Sinapis alba, Brassica napus) were also compared. Except for H.

Assessment of Cr and Ni phytotoxicity from cutlery-washing waste-waters using biomass and chlorophyll production tests on mustard Sinapis alba L. seedlings.

Background, Aim, And Scope: The aim of this work was to determine phytotoxicity of washing waste-waters from a cutlery production line with high content of Cr and Ni. These waters were previously classified, without verification, as dangerous and it is now necessary to question the justice of the present classification under the new legislation for waste management (Waste Law No. 223/2001) in the Slovak Republic.