12 strains o f the geni Chlorella, Scenedesmus, Chlamydomonas, and Dunaliella were tested for their tolerance against the anionic detergent “L A S” (linear alkylbenzene sulfonate). Cellular parameters (cell titer and chlorophyll content) were monitored for 28 days after addition o f LAS (0 .0 1 —2 m M ) . A 100-fold difference in sensitivity toward LAS was detected for the algal strains analyze...

Quantitative electron microscopy (stereology) was used to assess the ultrastructural response of three algae representative of the classes Chlorophyceae, Cyanophyceae, and Bacillariophyceae to lead-coupled polyphosphate degradation. The organisms were exposed to a culture medium concentration of 20 ppb Pb for 3 hr at the time of luxury phosphate uptake and subsequently transferred to phosphorus...

Freshwater salinization is a growing environmental issue caused by various anthropic or natural factors that lead to changes in water chemistry and physical conditions, affecting the survival diversity of phytoplankton. In this study, we tested physiological, morphological interspecific competition freshwater cyanobacterium Microcystis aeruginosa green algae Scenedesmus obliquus salinity stress...

Iron-sufficient cells of the green alga Scenedesmus incrassatulus Bohl, R-83 released in the medium strong and weak Fe3+-complexing agents in response to freshly added Fe3+. Applied in the dark, photosynthetic inhibitor 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) inhibited ferric reduction from ferric-EDTA or ferricyanide more than the chelator release. Fedeficient cells and DCMU-treated Fe-...

The biocidal activity of 8 triorganotins R3S11X (R = butyl, phenyl, benzyl; X = oxide, chloride, acetate, naphthenate, TV, JV-diethyldithiocarbamate) on brown rot fungi, moulds mixture, benthic organisms, plankton alga Scenedesmus quadricauda, and crop plant has been investigated. The results suggest dependence between lipophilicity of bounded R groups and intensity of unfavourable effect. The ...