Enhanced dissipation of xenobiotic agrochemicals harnessing soil microbiome in the tillage-reduced rice-dominated agroecosystem

SONG, Yuan-feng; TANG, Ming-xin; Lu, Qiqi; Zhong, Guohua

doi:10.1016/j.jhazmat.2020.122954

Cited by 20 publications

(9 citation statements)

References 51 publications

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“…In this paper changes in some variables such as soil properties (pH, OC, and DOC contents), and the presence of a crop (winter wheat) and amendments (SMS and GC) during both application years may also be responsible for changes in soil microorganisms In this paper changes in some variables such as soil properties (pH, OC, and DOC contents), and the presence of a crop (winter wheat) and amendments (SMS and GC) during both application years may also be responsible for changes in soil microorganisms which could help to explain chlorotoluron and flufenacet dissipation in the soil, as observed in previous studies [15,22,36,37]. It is expected that different dissipation processes, including biodegradation/mineralization and/or mobility in the soil profile, could explain the behavior of chlorotoluron and flufenacet, especially in amended soils after the repeated application, although this was not compared with control plots with a single herbicide application during the second year.…”

Section: Comparison Of the Dissipation Kinetics Of Chlorotoluron And Flufenacet After Repeated Applicationsupporting

confidence: 63%

“…Janaki et al [17] have reported the increased dissipation of butachlor due to higher initial precipitation which might have diluted or entrained the herbicide residues during the rice growing period. Similarly, Liu et al [36] have reported lower residues of fungicide tricyclazole in rice fields from April to June due to the more frequent precipitation, which could accelerate the dissipation of pesticides by increasing their mobility through the soil profile.…”

Section: Relationship Between Dissipation Parameters and Weather Conditionsmentioning

confidence: 88%

“…Variations in precipitation and temperature over the different seasons will have an effect on the leaching, degradation, and persistence of herbicides and on their efficacy for weed control [35,36]. High accumulated precipitation (68.4 mm) at 64 days (Figure 1b) after the second application of the herbicides could have decreased the persistence of these compounds in the topsoil and accelerated their dissipation.…”

Section: Relationship Between Dissipation Parameters and Weather Conditionsmentioning

confidence: 99%

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Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

et al. 2021

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Organic wastes applied as composted amendments may improve the quality of degraded soils and modify the fate of pesticides. This work has set out to study the dissipation kinetics of the herbicides chlorotoluron and flufenacet during their second-year application in field experimental plots with a sandy-loam agricultural soil without amendment (S) and amended with spent mushroom substrate (S + SMS) or green compost (S + GC). The SMS and GC were applied to the soil during the previous winter’s wheat crop campaign (1 year before the second herbicide application) at rates of 140 and 85 t ha−1 (dry weight basis), respectively. The experiment involved randomized complete blocks with plots of 81 m2, including three replicates per soil treatment. Surface soils were sampled after herbicide application for 225 days, and herbicide residues in the soil samples were determined by HPLC-MS. The dissipation curves of both herbicides for the three soil treatments were better fitted to the first order multi-compartment (FOMC) kinetic model. The dissipation rates of the most hydrophobic herbicide, flufenacet, were slower than those for chlorotoluron in both unamended and amended soils. The half-life (DT50) values ranged between 20.7 to 41.1 days for chlorotoluron, and 42.9 to 75.6 days for flufenacet, and they followed the order S > S + SMS > S + GC. The DT50 values of chlorotoluron were close for S + SMS and S + GC, and the DT50 of flufenacet for S was similar to that for S + SMS. These DT50 values decreased up to four times with respect to those calculated after the first application indicating an accelerated dissipation of the herbicides after the second application especially in amended soil in comparison with unamended soil. The persistence of chlorotoluron and flufenacet in an agricultural soil was modified by the effect of the organic amendments, weather conditions, and possibly the repeated application of the compounds under real field conditions.

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Section: Comparison Of the Dissipation Kinetics Of Chlorotoluron And Flufenacet After Repeated Applicationsupporting

confidence: 63%

Section: Relationship Between Dissipation Parameters and Weather Conditionsmentioning

confidence: 88%

Section: Relationship Between Dissipation Parameters and Weather Conditionsmentioning

confidence: 99%

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Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

et al. 2021

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“…Previous studies have observed no [ 55 ], or partial, pesticide degradation [ 43 , 54 ], including partial degradation of clothianidin [ 21 , 43 , 44 , 61 ]. Studies have highlighted how pesticide degradation differs depending on the chemical agent involved [ 21 , 62 ], initial concentration used [ 43 ] or microbial strains involved [ 21 , 41 ].…”

Section: Discussionmentioning

confidence: 99%

Endogenous Honeybee Gut Microbiota Metabolize the Pesticide Clothianidin

2022

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Including probiotics in honeybee nutrition represents a promising solution for mitigating diseases, and recent evidence suggests that various microbes possess mechanisms that can bioremediate environmental pollutants. Thus, the use of probiotics capable of degrading pesticides used in modern agriculture would help to both reduce colony losses due to the exposure of foragers to these toxic molecules and improve honeybee health and wellbeing globally. We conducted in vitro experiments to isolate and identify probiotic candidates from bacterial isolates of the honeybee gut (i.e., endogenous strains) according to their ability to (i) grow in contact with three sublethal concentrations of the pesticide clothianidin (0.15, 1 and 10 ppb) and (ii) degrade clothianidin at 0.15 ppb. The isolated bacterial strains were indeed able to grow in contact with the three sublethal concentrations of clothianidin. Bacterial growth rate differed significantly depending on the probiotic candidate and the clothianidin concentration used. Clothianidin was degraded by seven endogenous honeybee gut bacteria, namely Edwardsiella sp., two Serratia sp., Rahnella sp., Pantoea sp., Hafnia sp. and Enterobacter sp., measured within 72 h under in vitro conditions. Our findings highlight that endogenous bacterial strains may constitute the base material from which to develop a promising probiotic strategy to mitigate the toxic effects of clothianidin exposure on honeybee colony health.

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“…For example, pesticide-tolerant microbes can benefit from the removal or reduction of pesticide-sensitive microbes and thrive under conditions of less competition for resources [39]. In previous studies investigating microbiota response to clothianidin, field exposure of bumblebees was reported to only induce marginal shifts in gut microbiota [40], whereas no significant changes were observed in soil microbial structure [41,42]. Conversely, other studies reported clothianidin degradation by microbial [43][44][45] and photocatalytic activities [46].…”

Section: Introductionmentioning

confidence: 99%

Dietary Contamination with a Neonicotinoid (Clothianidin) Gradient Triggers Specific Dysbiosis Signatures of Microbiota Activity along the Honeybee (Apis mellifera) Digestive Tract

et al. 2021

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Pesticides are increasing honeybee (Apis mellifera) death rates globally. Clothianidin neonicotinoid appears to impair the microbe–immunity axis. We conducted cage experiments on newly emerged bees that were 4–6 days old and used a 16S rRNA metataxonomic approach to measure the impact of three sublethal clothianidin concentrations (0.1, 1 and 10 ppb) on survival, sucrose syrup consumption and gut microbiota community structure. Exposure to clothianidin significantly increased mortality in the three concentrations compared to controls. Interestingly, the lowest clothianidin concentration was associated with the highest mortality, and the medium concentration with the highest food intake. Exposure to clothianidin induced significant variation in the taxonomic distribution of gut microbiota activity. Co-abundance network analysis revealed local dysbiosis signatures specific to each gut section (midgut, ileum and rectum) were driven by specific taxa. Our findings confirm that exposure to clothianidin triggers a reshuffling of beneficial strains and/or potentially pathogenic taxa within the gut, suggesting a honeybee’s symbiotic defense systems’ disruption, such as resistance to microbial colonization. This study highlights the role of weak transcriptional activity taxa in maintaining a stable honeybee gut microbiota. Finally, the early detection of gut dysbiosis in honeybees is a promising biomarker in hive management for assessing the impact exposure to sublethal xenobiotics.

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Enhanced dissipation of xenobiotic agrochemicals harnessing soil microbiome in the tillage-reduced rice-dominated agroecosystem

Cited by 20 publications

References 51 publications

Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

Endogenous Honeybee Gut Microbiota Metabolize the Pesticide Clothianidin

Dietary Contamination with a Neonicotinoid (Clothianidin) Gradient Triggers Specific Dysbiosis Signatures of Microbiota Activity along the Honeybee (Apis mellifera) Digestive Tract

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