Effects of Three Pesticides on the Earthworm Lumbricus terrestris Gut Microbiota

Astaykina, A.; Streletskii, R.; Maslov, M.; Krasnov, G.; Gorbatov, V.

Авторы: Astaykina Angelika, Streletskii Rostislav, Maslov Mikhail, Krasnov George, Gorbatov Victor
Журнал: Frontiers in microbiology
Том: 13
Год издания: 2022
Издательство: Frontiers Research Foundation
Местоположение издательства: Switzerland
Первая страница: 1
Последняя страница: 12
Номер статьи: 853535
DOI: 10.3389/fmicb.2022.853535
Аннотация: Earthworms play a vital role in the terrestrial ecosystem functioning and maintenance ofsoil fertility. However, many pesticides, for example, imidacloprid, benomyl, and metribuzinthat are world-widely used in agriculture, may be potentially dangerous to earthworms.At the same time, standard tests for pesticides acute and chronic toxicity do not reflectall aspects of their negative impact and might not be enough sensitive for effectiveassessment. In this paper, we studied the effects of non-lethal concentrations ofimidacloprid, benomyl, and metribuzin on the gut bacterial community of Lumbricusterrestris using high-throughput sequencing approach. We found that pesticides reducedthe total bacterial diversity in the earthworm’s gut even at the recommended applicationrate. Under the applied pesticides, the structure of the gut prokaryotic communityunderwent changes in the relative abundance of the phyla Proteobacteria, Actinobacteria,Acidobacteria, Planctomyces, Verrucomicrobia, and Cyanobacteria, as well as the generaHaliangium, Gaiella, Paenisporosarcina, Oryzihumus, Candidatus Udaeobacter, andAquisphaera. Moreover, the pesticides affected the abundance of Verminephrobacter—theearthworms’ nephridia specific symbionts. In general, the negative impact of pesticideson bacterial biodiversity was significant even under pesticides content, which was muchlower than their acute and chronic toxicity values for the earthworms. These resultshighlighted the fact that the earthworm’s gut microbial community is highly sensitive tosoil contamination with pesticides. Therefore, such examination should be considered inthe pesticide risk assessment protocols.
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Effects of Three Pesticides on the Earthworm Lumbricus terrestris Gut Microbiotaстатья

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