Mechanisms of the novel pesticide sodium dodecyl benzene sulfonate in the mitigation of protozoan ciliated pathogens during microalgal cultivation

• Published in: Marine pollution bulletin Vol. 201; p. 116204
• Main Authors: Sun, Gaojingwen, Jia, Ruiqi, Zhang, Yan, Zhang, Zhaoji, Wang, Yunlong, Ma, Rui, Wang, Yaxin, Jiang, Zhiyang, Liu, Mingjian, Jiang, Yong
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2024
• Subjects: Benzenesulfonates; Biological control; Biomass; Chlorella; Ciliophora; Ecosystem; Microalgae; Microalgal cultivation; Pesticides; Protozoan contamination; Surfactant; Transcriptome; Protozoan contamination; Surfactant; Biological control; Microalgal cultivation; Transcriptome
• ISSN: 0025-326X; 1879-3363
• DOI: 10.1016/j.marpolbul.2024.116204

Protozoan ciliates represent a common biological contaminant during microalgae cultivation, which will lead to a decline in microalgae productivity. This study investigated the effectiveness of sodium dodecyl benzene sulfonate (SDBS) in controlling ciliate populations within microalgae cultures. SDBS concentrations of 160 mg/L and 100 mg/L were found to effectively manage the representative species of ciliates contamination by Euplotes vannus and Uronema marinum during the cultivation of Synechococcus and Chlorella, and the growth vitality of microalgae has been restored. Additionally, SDBS at these concentrations reduced oxidative stress resistance and induced membrane damage to remove biological pollutants by modulating enzyme activity, affecting lipid, energy, amino acid metabolism pathways, and processes such as translation and protein folding. This research provides insights into the mechanisms through which SDBS effectively combats protozoan ciliates during the microalgal cultivation. This contributes to reduce biological pollution, ensure the overall productivity and healthy and sustainable management of microalgae ecosystems. [Display omitted] •SDBS could effectively remove ciliate contamination during microalgae culture.•SDBS proficiently eradicate ciliates while preserving the growth of microalgae.•Ciliates treated with SDBS developed severe oxidative stress response.•SDBS caused damage of cell membrane and metabolic disorders to ciliates.