Growth and Cellular Responses of Toxigenic Microcystis to Chloramphenicol-Stress at Various Environmentally-Relevant Nitrogen Levels
| Autor: | Lin Luo, Zhong Zhang, Jieming Li, Jiaqi Hu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Microcystis
Antioxidant Microcystins Nitrogen Health Toxicology and Mutagenesis medicine.medical_treatment chemistry.chemical_element Microcystin Glutathione synthesis 010501 environmental sciences Cyanobacteria Toxicology 01 natural sciences Microbiology medicine Ecotoxicology Cell damage 0105 earth and related environmental sciences chemistry.chemical_classification biology Chloramphenicol 04 agricultural and veterinary sciences General Medicine biology.organism_classification medicine.disease Pollution chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries medicine.drug |
| Zdroj: | Bulletin of Environmental Contamination and Toxicology. 105:337-344 |
| ISSN: | 1432-0800 0007-4861 |
| Popis: | This study explored nitrogen (N)-dependent interaction between Microcystis and chloramphenicol (CAP) along 20 day-test. Results showed that 5 mg/L N largely alleviated inhibitory effects of CAP on Microcystis growth, while 50 and 0.5 mg/L N exacerbated growth-inhibition by CAP especially in early (before day 8) and mid-late stage, respectively. At each N level, CAP-induced antioxidant defense and cell damage extents were negatively correlated to growth state in each stage, and CAP-biodegradation coincided with Microcystis growth and glutathione synthesis dynamics, implying that antioxidant defense, cell damage and CAP-removal closely linked to N-dependent Microcystis growth under CAP-stress. Microcystin (MC)-production and -release under CAP-stress were also N-dependent. Although Microcystis growth was greatly-inhibited by prolonged CAP-stress at 0.5 mg/L N, delayed CAP-loss and high MC-release at 0.5 mg/L N should be emphasized during Microcystis-dominated cyanobacterial blooms (MCBs) and CAP co-occurrence. This study had great implication in risk assessment for MCBs-CAP co-occurrence in different waters. |
| Databáze: | OpenAIRE |
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