Growth Environment and Bacterial Toxicity

Associated bacterial flora, growth, and toxicity of cultured benthic dinoflagellates Ostreopsis lenticularis and Gambierdiscus toxicus.

The growth, toxicity, and associated bacterial flora of 10 clonal cultures of the toxic benthic dinoflagellates Ostreopsis lenticularis and Gambierdiscus toxicus isolated from the coastal waters of southwest Puerto Rico have been examined. Clonal cultures of O. lenticularis grew more rapidly and at broader temperature ranges than those of G. toxicus. All five Ostreopsis clones were toxic, while...

Bacterial mutagenicity and toxicity of cycloaliphatic epoxides.

The mutagenicity of 12 cycloaliphatic epoxides was investigated using the Ames Salmonella assay without the addition of liver homogenate fractions. Base-pair substitution mutagenic activity was detected for 8 members of this series of compounds, confirming our laboratory's previous observations of weak mutagenic response at high dose levels for cis-1,2-disubstituted epoxides. While mutagenicity...

Toxicity of four spill-treating agents on bacterial growth and sea urchin embryogenesis.

The toxicity of spill-treating agents (STAs) is a topic that needs to be assessed prior to their potential application in environmental disasters. The aim of the present work was to study the effects of four commercial STAs (CytoSol, Finasol OSR 51, Agma OSD 569 and OD4000) on the growth of marine (Phaeobacter sp., Pseudomonas sp.) and terrestrial (Leuconostoc mesenteroides) bacteria, and sea u...

Peptides and Bacterial Growth

Lactobacillus casei grows in the absence of vitamin Ba, provided that D-alanine and an unidentified peptide are added to a medium complete in other nutrients (1, 2). A partial hydrolysate of protein contained several chromatographically distinct fractions that possessed this “peptide factor” activity (3). It appeared likely that a single amino acid linked in a variety of combinations was respon...

Bacterial Growth and Division