Role of soil texture and earthworm casts on the restoration of soil enzyme activities after exposure to an organophosphorus insecticide

Effect of an organophosphorus insecticide, soil texture and earthworm species on the turnover of soil, gut and cast microbiota during the earthworm's gut transit

“…Ethyl-parathion appears to mostly affect the soil and casts microbial communities compared to those of the gut. The decrease of microbial abundance and diversity in casts, particularly observed in the silt-clay soil G, must be put in relation with our previous work (Jouni et al, 2023) where soil enzyme activities were more affected by ethyl-parathion in that soil.…”

“…Other studies have shown contradictory effects of pesticides on gut microbiota: imidacloprid (neonicotinoid), benomyl (fungicide) and metribuzin (herbicide) were shown to reduce the total prokaryotic diversity in the earthworm's gut (Astaykina et al, 2022). However, we can assume that the soil texture could affect the response of microbial communities as a weak restoration of enzyme activities was observed after parathion exposure in casts from soil G (Jouni et al, 2023). The pesticide effects were more marked when considering fractions of the soil microbiota that were upheld or depleted following digestive transit.…”

“…Prokaryotic growth stimulation has been attributed to anaerobic and fermentative microbial activities involved in the catabolism of large molecules and in the stimulation of carbon, nitrogen and phosphorus cycles (Lubbers et al, 2017;Budroni et al, 2020;Wang N. et al, 2021). This stimulation could be linked to higher soil enzyme activities measured in casts compared to the initial bulk-soil (Jouni et al, 2023).…”

Abatement effects of different soil amendments on continuous cropping of Codonopsis pilosula

“…Chemosensitizers, which cause the continuous cropping obstacle to develop, are typically distributed in plant reproductive and some nutrient organs. They can be released into the environment via a number of different pathways, including exudation with root secretions (Deng et al, 2017;Jouni et al, 2023;Nwe et al, 2023). The germination and seedling growth may be hindered by autotoxic chemicals found in soil extracts (He et al, 2018).…”