Toxicity of ten herbicides to the tropical marine microalgae Rhodomonas salina.

ABSTRACT: Herbicide contamination of nearshore tropical marine ecosystems is widespread and persistent; however, risks posed by most 'alternative' herbicides to tropical marine microalgae remain poorly understood. Experimental exposures of the important but understudied microalgae Rhodomonas salina to seven individual Photosystem II (PSII) inhibitor herbicides (diuron, metribuzin, hexazinone, tebuthiuron, bromacil, simazine, propazine) led to inhibition of effective quantum yield (ΔF/F_m') and subsequent reductions in specific growth rates (SGR). The concentrations which reduced ΔF/F_m' by 50% (EC₅₀) ranged from 1.71-59.2 µg L^-1, while the EC₅₀s for SGR were 4-times higher, ranging from 6.27-188 µg L^-1. Inhibition of ΔF/F_m' i

SUBMITTER: Thomas MC 

PROVIDER: S-EPMC7203118 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature