We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Response of Marine Microalgae Tetraselmis chuii to 5 Groups of Antibiotics
Summary
Researchers tested three doses of five antibiotic groups (quinolones, tetracyclines, penicillins, macrolides, and sulfonamides) on the marine green microalgae Tetraselmis chuii, measuring cell density, dry biomass, specific growth rate, and chlorophyll content as stress biomarkers. Tetracyclines, penicillins, and sulfonamides inhibited algal growth at all tested doses, while effects among quinolones varied by specific compound.
Abstract Antibiotic contamination in aquatic environments, as well as its effects on non-target organisms, has recently come to the attention of researchers. In the current study, three dosages (1, 0.5, and 0.25mg/L) of five antibiotic groups were tested on the marine green microalgae T. chuii: quinolones, tetracyclines, penicillins, macrolides, and sulfanamides. As stress biomarkers, cell density, dry biomass, specific growth rate, and chlorophyll content were calculated. Tetracyclines, penicilines, and sulfonamide in all doses inhibited algal growth. Among Quinolones, Ciprofloxacin and Enrofloxacin stimulated green algae growth at all tested dosages, whereas 1mg/l of Levofloxacin and Nalidilic acid inhibited it slightly while the other dosages stimulated it. Similar results were obtained for Macrolides: all three Erythromycin dosages were toxic to T.chuii, while 1mg/L was not. Similar results were obtained for Macrolides: all three Erythromycin dosages were toxic to T.chuii; while 1mg/L of Tylosin stimulated algal growth, lower dosages inhibited it. As a result, antibiotic pollution may alter the aquatic environment not only by reducing or inhibiting the growth of one species, but also by stimulating the growth of others, resulting in ecological imbalance and, as a result, the food chain. Using specific antibiotics in specific dosages in microalgae farms, on the other hand, could increase biomass while decreasing microbial contaminations.
Sign in to start a discussion.
More Papers Like This
Toxicity of Tetracycline and Metronidazole in Chlorella pyrenoidosa
Researchers studied the individual and combined toxicity of the antibiotics tetracycline and metronidazole on the green alga Chlorella pyrenoidosa. The study found that tetracycline was more toxic than metronidazole, and when combined, the two antibiotics had a synergistic effect that increased damage to algal cell membranes, morphology, and oxidative stress responses.
The Toxic Effects of Antibiotics on Freshwater and Marine Photosynthetic Microorganisms: State of the Art
This review summarizes the toxic effects of over 60 antibiotics on freshwater and marine photosynthetic microorganisms. Researchers found that 60% of the available toxicity data comes from a single freshwater algae species, with marine species vastly understudied. The study highlights critical knowledge gaps in chronic antibiotic exposure effects and calls for research using environmentally relevant concentrations and combined exposure scenarios.
Combined Effects of Sulfamethoxazole and Erythromycin on a Freshwater Microalga, Raphidocelis subcapitata: Toxicity and Oxidative Stress
Researchers studied the combined toxicity of two common antibiotics, sulfamethoxazole and erythromycin, on the freshwater microalga Raphidocelis subcapitata. The study found that high concentrations of these antibiotics inhibited algal growth, altered pigment content, and disrupted antioxidant enzyme activities, with the antibiotic mixture showing different toxicity patterns than individual exposures.
Effects of two typical quinolone antibiotics in the marine environment on Skeletonema costatum
This study tested the effects of two common antibiotic drugs, levofloxacin and norfloxacin, on the marine algae Skeletonema costatum. Researchers found that both antibiotics inhibited algal growth, reduced chlorophyll content, and triggered oxidative stress responses, indicating that pharmaceutical pollution in marine environments can disrupt the base of the ocean food web.
Influence of microplastics on the toxicity of the pharmaceuticals procainamide and doxycycline on the marine microalgae Tetraselmis chuii
Researchers investigated whether the presence of microplastics influences the toxicity of two pharmaceuticals, procainamide and doxycycline, on the marine microalga Tetraselmis chuii. They found that microplastics alone had limited effects, but when combined with pharmaceuticals, the mixture interactions varied depending on the drug and the measured endpoint. The study suggests that the co-occurrence of microplastics and pharmaceutical pollutants in marine environments may produce unpredictable combined effects on primary producers.