Algicidal bacteria in phycosphere regulate free-living Symbiodinium fate via triggering oxidative stress and photosynthetic system damage

Jia, Yang; Lu, Jiazhan; Wang, Min; Qin, Wenli; Chen, Binbin; Xu, Hanqing; Ma, Zengling

doi:10.1016/j.ecoenv.2023.115369

Cited by 8 publications

(2 citation statements)

References 52 publications

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“…Under the influence of two low-concentration antibiotics in this study, the Fv/Fm of microalgae exhibited an initial increase followed by a subsequent decrease, whereas the high-concentration group demonstrated markedly lower Fv/Fm values compared to the control group at the 4 h. This result indicated that with an increase in the duration of treatment and antibiotic concentration, the damage to the algal cell photosynthetic system worsened, making normal photosynthesis impossible. Therefore, under the influence of antibiotics, the Fv/Fm values of algal cells vary due to factors such as the treatment duration, antibiotic concentration, and microalgae species (Chen et al, 2020b;Jia et al, 2023;Li et al, 2023).…”

Section: Impact On the Chla And Fv/fmmentioning

confidence: 99%

Effects of two typical quinolone antibiotics in the marine environment on Skeletonema costatum

Lin,

Li,

Zhang

2024

Front. Mar. Sci.

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This study investigated the effects of levofloxacin (LEV) and norfloxacin (NOR) on Skeletonema costatum, focusing on cell growth, chlorophyll a (Chla) content, maximal quantum yield of PSII (Fv/Fm), protein content, enzyme activities of superoxide dismutase (SOD), glutathione reductase (GR), and glutathione peroxidase (GSH-PX), and the membrane lipid peroxidation product malondialdehyde (MDA) content were conducted to analyze the responses of S. costatum under LEV and NOR exposure. Cell growth, Chla content, Fv/Fm, protein content, enzyme activities, and MDA content were assessed to elucidate physiological changes. Both LEV and NOR inhibited S. costatum growth, except for 10 mg/L NOR, which promoted growth. Algal cells exhibited higher sensitivity to LEV, with 96h-IC50 values of 14.770 mg/L for LEV and 44.250 mg/L for NOR. Low NOR concentration (10 mg/L) increased Chla content, while high antibiotic concentrations (>20 mg/L for LEV, >100 mg/L for NOR) decreased Chla content and Fv/Fm, indicating an impact on photosynthesis. Elevated LEV and NOR levels reduced protein and MDA content but increased GR, SOD, and GSH activities, indicating induced oxidative stress. The study provides a comprehensive analysis of LEV and NOR effects on marine microalgae growth and underlying physiological mechanisms, shedding light on potential ecological risks posed by antibiotics in marine ecosystems.

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Section: Impact On the Chla And Fv/fmmentioning

confidence: 99%

Effects of two typical quinolone antibiotics in the marine environment on Skeletonema costatum

Lin,

Li,

Zhang

2024

Front. Mar. Sci.

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“…Other studies have revealed that co-cultivation of microalgae and bacteria can produce algicidal compounds. Unlike biomass enhancement, these compounds are aimed at controlling algae blooms in aquaculture [68,69]. As mentioned earlier, while there has been limited research dedicated solely to co-culturing photosynthetic organisms to produce bioactive metabolites or the discovery of new molecules, the experience gained from various co-cultivation applications and the reported bioactivities indicate a highly positive outlook.…”

Section: Recent Status Of Co-cultivation Of Photosynthetic Microorgan...mentioning

confidence: 99%

Insights into Co-Cultivation of Photosynthetic Microorganisms for Novel Molecule Discovery and Enhanced Production of Specialized Metabolites

Rojas-Villalta,

Gómez-Espinoza,

Murillo-Vega

et al. 2023

Fermentation

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Meso- and extremophilic microalgae and cyanobacteria have a wide range of biotechnological applications. However, the industrial demand for bioactive molecules and the redundancy of these molecules has resulted in a need for new methodologies for enhanced production and the discovery of specialized metabolites. Co-cultivation has been established as a promising approach to addressing these challenges. In this context, this work aimed to describe the state of the art of the co-cultivation method involving meso- and extremophilic photosynthetic microorganisms, as well as discuss the advantages, challenges, and limitations of this approach. Co-culture is defined as an ecology-driven method in which various symbiotic interactions involving cyanobacteria and microalgae can be used to explore new compounds and enhanced production. Promising results regarding new bioactive metabolite expression and increased production through co-cultivation-based research support that idea. Also, the metabolic diversity and evolutionary adaptations of photosynthetic microorganisms to thrive in extreme environments could improve the efficiency of co-cultivation by allowing the implementation of these microorganisms. However, the complexity of ecological interactions and lack of standardization for co-cultivation protocols are obstacles to its success and scientific validation. Further research in symbiotic interplays using -omics and genetic engineering, and predictive experimental designs for co-cultures are needed to overcome these limitations.

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Advances of high-throughput sequencing for unraveling biotechnological potential of microalgal-bacterial communities

Zaytsev,

Rodin,

Zaytseva

et al. 2024

J Appl Phycol

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Algicidal bacteria in phycosphere regulate free-living Symbiodinium fate via triggering oxidative stress and photosynthetic system damage

Cited by 8 publications

References 52 publications

Effects of two typical quinolone antibiotics in the marine environment on Skeletonema costatum

Effects of two typical quinolone antibiotics in the marine environment on Skeletonema costatum

Insights into Co-Cultivation of Photosynthetic Microorganisms for Novel Molecule Discovery and Enhanced Production of Specialized Metabolites

Advances of high-throughput sequencing for unraveling biotechnological potential of microalgal-bacterial communities

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