Response of bacterial communities in saline-alkali soil to different pesticide stresses

Che, Juan; Zhu, Yongqiang; Li, Yan Hong; Ruan, Zhi Yong; Zhang, Wei

doi:10.1007/s11356-021-16316-w

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…Compared to other city, pesticides used less. On the other hand, saline-alkali stress reduces soil bacterial community diversity and soil enzyme activities and affects the metabolism of pesticides [ 35 , 36 ]. Mosquito gut microbes may participate in the resistance of the host to insecticides to alleviate the effects of insecticides on the host [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the evolutionary genetics and population structure of Culex pipiens pallens in Shandong province, China based on knockdown resistance (kdr) mutations and the mtDNA-COI gene

et al. 2023

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Background Mosquitoes are important vectors for a range of diseases, contributing to high rates of morbidity and mortality in the human population. Culex pipiens pallens is dominant species of Culex mosquito in northern China and a major vector for both West Nile virus and Bancroftian filariasis. Insecticide application were largely applied to control the mosquito-mediated spread of these diseases, contributing to increasing rates of resistance in the mosquito population. The voltage-gated sodium channel (Vgsc) gene is the target site of pyrethroids, and mutations in this gene cause knockdown resistance (kdr). While these kdr mutations are known to be critical to pyrethroid resistance, their evolutionary origins remain poorly understood. Clarifying the origins of these mutations is potential to guide further vector control and disease prevention efforts. Accordingly, the present study was designed to study the evolutionary genetics of kdr mutations and their association with the population structure of Cx. p. pallens in Shandong province, China. Methods Adult Culex females were collected from Shandong province and subjected to morphological identification under a dissection microscope. Genomic DNA were extracted from the collected mosquitoes, the Vgsc gene were amplified via PCR and sequenced to assess kdr allele frequencies, intron polymorphisms, and kdr codon evolution. In addition, population genetic diversity and related population characteristics were assessed by amplifying and sequencing the mitochondrial cytochrome C oxidase I (COI) gene. Results Totally, 263 Cx. p. pallens specimens were used for DNA barcoding and sequencing analyses to assess kdr allele frequencies in nine Culex populations. The kdr codon L1014 in the Vgsc gene identified two non-synonymous mutations (L1014F and L1014S) in the analyzed population. These mutations were present in the eastern hilly area and west plain region of Shandong Province. However, only L1014F mutation was detected in the southern mountainous area and Dongying city of Shandong Province, where the mutation frequency was low. Compared to other cities, population in Qingdao revealed significant genetic differentiation. Spatial kdr mutation patterns are likely attributable to some combination of prolonged insecticide-mediated selection coupled with the genetic isolation of these mosquito populations. Conclusions These data suggest that multiple kdr alleles associated with insecticide resistance are present within the Cx. p. pallens populations of Shandong Province, China. The geographical distributions of kdr mutations in this province are likely that the result of prolonged and extensive insecticide application in agricultural contexts together with frequent mosquito population migrations. In contrast, the low-frequency kdr mutation detected in central Shandong Province populations may originate from the limited selection pressure in this area and the relative genetic isolation. Overall, the study compares the genetic patterns revealed by a functional gene with a neutral marker and demonstrates the combined impact of demographic and selection factors on population structure.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the evolutionary genetics and population structure of Culex pipiens pallens in Shandong province, China based on knockdown resistance (kdr) mutations and the mtDNA-COI gene

et al. 2023

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“…The salinization of the soil is increasing and more than 50% of the global arable land is predicted to be salinized by the year 2050 ( Butcher et al, 2016 ). The belowground microbial communities were commonly influenced by saline-alkali conditions ( Liu et al, 2021 ; Che et al, 2022 ). In this study, we focused on the effects of saline-alkali stress and Epichloë endophytes in the aboveground parts of tall fescue on belowground processes including PSF and PSB.…”

Section: Introductionmentioning

confidence: 99%

Epichloë endophyte interacts with saline-alkali stress to alter root phosphorus-solubilizing fungal and bacterial communities in tall fescue

Liu

Tang

et al. 2022

Front. Microbiol.

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Epichloë endophytes, present in aboveground tissues, modify belowground microbial community. This study was conducted to investigate endophyte (Epichloë coenophialum) associated with tall fescue (Lolium arundinaceum) interacted with an altered saline-alkali stress (0, 200 and 400 mmol/l) to affect the belowground phosphorus solubilizing microorganisms including phosphorus solubilizing fungi (PSF) and bacteria (PSB). We found that a significant interaction between E. coenophialum and saline-alkali stress occurred in the diversity and composition of PSF in tall fescue roots. Under saline-alkali stress conditions (200 and 400 mmol/l), E. coenophialum significantly increased the PSF diversity and altered its composition in the roots, decreasing the relative abundance of dominant Cladosporium and increasing the relative abundance of Fusarium. However, there was no significant interaction between E. coenophialum and saline-alkali stress on the PSB diversity in tall fescue roots. E. coenophialum significantly reduced the diversity of PSB in the roots, and E. coenophialum effects did not depend on the saline-alkali stress treatment. Structural equation modeling (SEM) showed that E. coenophialum presence increased soil available phosphorus concentration under saline-alkali stress primarily by affecting PSF diversity instead of the diversity and composition of PSB.

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Simultaneous removal of nitrate and pesticides from contaminated groundwater using aerobic granular biomass technology

Muñoz-Palazon

Hurtado-Martinez

Rosa-Masegosa

et al. 2023

Journal of Environmental Chemical Engineering

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Response of bacterial communities in saline-alkali soil to different pesticide stresses

Cited by 4 publications

References 36 publications

Evaluation of the evolutionary genetics and population structure of Culex pipiens pallens in Shandong province, China based on knockdown resistance (kdr) mutations and the mtDNA-COI gene

Evaluation of the evolutionary genetics and population structure of Culex pipiens pallens in Shandong province, China based on knockdown resistance (kdr) mutations and the mtDNA-COI gene

Epichloë endophyte interacts with saline-alkali stress to alter root phosphorus-solubilizing fungal and bacterial communities in tall fescue

Simultaneous removal of nitrate and pesticides from contaminated groundwater using aerobic granular biomass technology

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