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  1. Article ; Online: Functional characterization and molecular fingerprinting of potential phosphate solubilizing bacterial candidates from Shisham rhizosphere.

    Joshi, Samiksha / Gangola, Saurabh / Jaggi, Vandana / Sahgal, Manvika

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 7003

    Abstract: Phosphate solubilizing bacteria (PSB) are important role players in plant growth promotion. In the present study, we aimed to screen the functionally active phosphate solubilizing bacteria (PSB) associated with Dalbergia sissoo Roxb. (Shisham) from ... ...

    Abstract Phosphate solubilizing bacteria (PSB) are important role players in plant growth promotion. In the present study, we aimed to screen the functionally active phosphate solubilizing bacteria (PSB) associated with Dalbergia sissoo Roxb. (Shisham) from different provenances. Screening for phosphate solubilization was done on Pikovskaya's agar, and 18 bacteria positive for the tri-calcium phosphate (Ca
    MeSH term(s) Phosphates/chemistry ; Rhizosphere ; Phylogeny ; Soil Microbiology ; Bacteria/genetics
    Chemical Substances Phosphates
    Language English
    Publishing date 2023-04-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-33217-9
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  2. Article ; Online: Developments and application of chitosan-based adsorbents for wastewater treatments

    Bhatt, Pankaj / Joshi, Samiksha / Urper Bayram, Gulsum Melike / Khati, Priyanka / Simsek, Halis

    Environmental Research. 2023 June, v. 226 p.115530-

    2023  

    Abstract: Water quality is deteriorating continuously as increasing levels of toxic inorganic and organic contaminants mostly discharging into the aquatic environment. Removal of such pollutants from the water system is an emerging research area. During the past ... ...

    Abstract Water quality is deteriorating continuously as increasing levels of toxic inorganic and organic contaminants mostly discharging into the aquatic environment. Removal of such pollutants from the water system is an emerging research area. During the past few years use of biodegradable and biocompatible natural additives has attracted considerable attention to alleviate pollutants from wastewater. The chitosan and its composites emerged as a promising adsorbents due to their low price, abundance, amino, and hydroxyl groups, as well as their potential to remove various toxins from wastewater. However, a few challenges associated with its practical use include lack of selectivity, low mechanical strength, and solubility in acidic medium. Therefore, several approaches for modification have been explored to improve the physicochemical properties of chitosan for wastewater treatment. Chitosan nanocomposites found effective for the removal of metals, pharmaceuticals, pesticides, microplastics from the wastewaters. Nanoparticle doped with chitosan in the form of nano-biocomposites has recently gained much attention and proven a successful tool for water purification. Hence, applying chitosan-based adsorbents with numerous modifications is a cutting-edge approach to eliminating toxic pollutants from aquatic systems with the global aim of making potable water available worldwide. This review presents an overview of distinct materials and methods for developing novel chitosan-based nanocomposites for wastewater treatment.
    Keywords adsorbents ; aquatic environment ; biodegradability ; chitosan ; drinking water ; drugs ; microplastics ; nanocomposites ; nanoparticles ; prices ; research ; solubility ; strength (mechanics) ; toxicity ; wastewater ; wastewater treatment ; water purification ; water quality ; Biosorbents ; Nano-biocomposites
    Language English
    Dates of publication 2023-06
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115530
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  3. Article ; Online: Esterase and ALDH dehydrogenase-based pesticide degradation by Bacillus brevis 1B from a contaminated environment

    Gangola, Saurabh / Bhandari, Geeta / Joshi, Samiksha / Sharma, Anita / Simsek, Halis / Bhatt, Pankaj

    Environmental Research. 2023 Sept., v. 232 p.116332-

    2023  

    Abstract: The isolated bacterial strain (Bacillus brevis strain 1 B) showed a maximum tolerated level of 450 mg L⁻¹ of the selected pesticides namely: imidacloprid, fipronil, cypermethrin, and sulfosulfuron. Within 15 days of the experiment, strain 1 B was able to ...

    Abstract The isolated bacterial strain (Bacillus brevis strain 1 B) showed a maximum tolerated level of 450 mg L⁻¹ of the selected pesticides namely: imidacloprid, fipronil, cypermethrin, and sulfosulfuron. Within 15 days of the experiment, strain 1 B was able to reduce up to 95% of a pesticide mixture (20 mg L⁻¹) in a carbon-deficient medium (minimal medium). The optimal conditions obtained using Response Surface Methodology (RSM) were: inoculums; 2.0 × 10⁷ CFU mL⁻¹, shaking speed; 120 rpm, and pesticide concentration; 80 mg L⁻¹. After 15 days of soil-based bioremediation using strain 1 B, the degradation pattern for imidacloprid, fipronil, cypermethrin, sulfosulfuron, and control was 99, 98.5, 94, 91.67, and 7%, respectively. Gas chromatography-mass spectrometry (GC-MS) analysis was used to determine the intermediate metabolites of cypermethrin with bacterial 1 B as 2-cyclopenten-1-one, 2-methylpyrrolidine, 2-oxonanone, 2-pentenoic acid, 2-penten-1-ol, hexadecanoic acid or palmitic acid, pentadecanoic acid, 3-cyclopentylpropionic acid, and 2-dimethyl. Furthermore, genes encoding aldehyde dehydrogenase (ALDH) and esterase were expressed under stress conditions and connected to pesticide bioremediation. Hence the efficacy of Bacillus brevis (1 B) could be employed for the bioremediation of pesticide mixtures and other toxic substances (dye, polyaromatic hydrocarbon, etc.) from contaminated sites.
    Keywords Brevibacillus brevis ; aldehyde dehydrogenase ; bioremediation ; cypermethrin ; dyes ; esterases ; fipronil ; gas chromatography-mass spectrometry ; imidacloprid ; inoculum ; metabolites ; palmitic acid ; pesticide degradation ; pesticide mixtures ; polycyclic aromatic hydrocarbons ; response surface methodology ; toxicity ; Pesticides ; Biodegradation ; Bacillus brevis 1B ; ALDH ; Esterase ; Intermediate metabolites
    Language English
    Dates of publication 2023-09
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.116332
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  4. Article ; Online: Developments and application of chitosan-based adsorbents for wastewater treatments.

    Bhatt, Pankaj / Joshi, Samiksha / Urper Bayram, Gulsum Melike / Khati, Priyanka / Simsek, Halis

    Environmental research

    2023  Volume 226, Page(s) 115530

    Abstract: Water quality is deteriorating continuously as increasing levels of toxic inorganic and organic contaminants mostly discharging into the aquatic environment. Removal of such pollutants from the water system is an emerging research area. During the past ... ...

    Abstract Water quality is deteriorating continuously as increasing levels of toxic inorganic and organic contaminants mostly discharging into the aquatic environment. Removal of such pollutants from the water system is an emerging research area. During the past few years use of biodegradable and biocompatible natural additives has attracted considerable attention to alleviate pollutants from wastewater. The chitosan and its composites emerged as a promising adsorbents due to their low price, abundance, amino, and hydroxyl groups, as well as their potential to remove various toxins from wastewater. However, a few challenges associated with its practical use include lack of selectivity, low mechanical strength, and solubility in acidic medium. Therefore, several approaches for modification have been explored to improve the physicochemical properties of chitosan for wastewater treatment. Chitosan nanocomposites found effective for the removal of metals, pharmaceuticals, pesticides, microplastics from the wastewaters. Nanoparticle doped with chitosan in the form of nano-biocomposites has recently gained much attention and proven a successful tool for water purification. Hence, applying chitosan-based adsorbents with numerous modifications is a cutting-edge approach to eliminating toxic pollutants from aquatic systems with the global aim of making potable water available worldwide. This review presents an overview of distinct materials and methods for developing novel chitosan-based nanocomposites for wastewater treatment.
    MeSH term(s) Adsorption ; Chitosan/chemistry ; Environmental Pollutants ; Plastics ; Wastewater ; Water Pollutants, Chemical/analysis ; Water Purification/methods
    Chemical Substances Chitosan (9012-76-4) ; Environmental Pollutants ; Plastics ; Wastewater ; Water Pollutants, Chemical
    Language English
    Publishing date 2023-02-28
    Publishing country Netherlands
    Document type Review ; Journal Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115530
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Esterase and ALDH dehydrogenase-based pesticide degradation by Bacillus brevis 1B from a contaminated environment.

    Gangola, Saurabh / Bhandari, Geeta / Joshi, Samiksha / Sharma, Anita / Simsek, Halis / Bhatt, Pankaj

    Environmental research

    2023  Volume 232, Page(s) 116332

    Abstract: The isolated bacterial strain (Bacillus brevis strain 1 B) showed a maximum tolerated level of 450 mg ... ...

    Abstract The isolated bacterial strain (Bacillus brevis strain 1 B) showed a maximum tolerated level of 450 mg L
    MeSH term(s) Pesticides/analysis ; Bacillus/genetics ; Bacillus/metabolism ; Oxidoreductases/metabolism ; Aldehyde Dehydrogenase/metabolism ; Esterases/metabolism ; Biodegradation, Environmental ; Bacteria/metabolism ; Soil Microbiology ; Soil Pollutants/analysis
    Chemical Substances cypermethrin (1TR49121NP) ; Pesticides ; imidacloprid (3BN7M937V8) ; sulfosulfuron (Y0XC20DL6D) ; Oxidoreductases (EC 1.-) ; Aldehyde Dehydrogenase (EC 1.2.1.3) ; Esterases (EC 3.1.-) ; Soil Pollutants
    Language English
    Publishing date 2023-06-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.116332
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Differential proteomic analysis under pesticides stress and normal conditions in Bacillus cereus 2D.

    Gangola, Saurabh / Joshi, Samiksha / Kumar, Saurabh / Sharma, Barkha / Sharma, Anita

    PloS one

    2021  Volume 16, Issue 8, Page(s) e0253106

    Abstract: A potential pesticide degrading bacterial isolate (2D), showing maximum tolerance (450 mg∙L-1) for cypermethrin, fipronil, imidacloprid and sulfosulfuron was recovered from a pesticide contaminated agricultural field. The isolate degraded cypermethrin, ... ...

    Abstract A potential pesticide degrading bacterial isolate (2D), showing maximum tolerance (450 mg∙L-1) for cypermethrin, fipronil, imidacloprid and sulfosulfuron was recovered from a pesticide contaminated agricultural field. The isolate degraded cypermethrin, imidacloprid, fipronil and sulfosulfuron in minimal salt medium with 94, 91, 89 and 86% respectively as revealed by high performance liquid chromatography (HPLC) and gas chromatography (GC) analysis after 15 days of incubation. Presence of cyclobutane, pyrrolidine, chloroacetic acid, formic acid and decyl ester as major intermediate metabolites of cypermethrin biodegradation was observed in gas chromatography mass spectrometry (GC-MS) analysis. Results based on 16S rDNA sequencing, and phylogenetic analysis showed maximum similarity of 2D with Bacillus cereus (Accession ID: MH341691). Stress responsive and catabolic/pesticide degrading proteins were over expressed in the presence of cypermethrin in bacteria. Enzymatic kinetics of laccase was deduced in the test isolate under normal and pesticide stress conditions which suggested that the production of enzyme was induced significantly in pesticide stress (163 μg.μL-1) as compare to normal conditions(29 μg.μL-1) while the Km value was decreased in pesticides stress condition (Km = 10.57 mM) and increases in normal condition (Km = 14.33 mM).Amplification of laccase gene showed a major band of 1200bp. The present study highlights on the potential of 2D bacterial strain i.e., high tolerance level of pesticide, effective biodegradation rate, and presence of laccase gene in bacterial strain 2D, could become a potential biological agent for large-scale treatment of mixture of pesticide (cypermethrin, fipronil, imidacloprid and sulfosulfuron) in natural environment (soil and water).
    MeSH term(s) Bacillus cereus/classification ; Bacillus cereus/metabolism ; Bacterial Proteins/metabolism ; Chromatography, High Pressure Liquid ; Gas Chromatography-Mass Spectrometry ; Pesticides/pharmacology ; Proteomics ; Pyrethrins/pharmacology ; Stress, Physiological/drug effects
    Chemical Substances Bacterial Proteins ; Pesticides ; Pyrethrins ; cypermethrin (1TR49121NP)
    Language English
    Publishing date 2021-08-13
    Publishing country United States
    Document type Journal Article
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0253106
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Rhizospheric bacteria: the key to sustainable heavy metal detoxification strategies.

    Joshi, Samiksha / Gangola, Saurabh / Bhandari, Geeta / Bhandari, Narendra Singh / Nainwal, Deepa / Rani, Anju / Malik, Sumira / Slama, Petr

    Frontiers in microbiology

    2023  Volume 14, Page(s) 1229828

    Abstract: The increasing rate of industrialization, anthropogenic, and geological activities have expedited the release of heavy metals (HMs) at higher concentration in environment. HM contamination resulting due to its persistent nature, injudicious use poses a ... ...

    Abstract The increasing rate of industrialization, anthropogenic, and geological activities have expedited the release of heavy metals (HMs) at higher concentration in environment. HM contamination resulting due to its persistent nature, injudicious use poses a potential threat by causing metal toxicities in humans and animals as well as severe damage to aquatic organisms. Bioremediation is an emerging and reliable solution for mitigation of these contaminants using rhizospheric microorganisms in an environmentally safe manner. The strategies are based on exploiting microbial metabolism and various approaches developed by plant growth promoting bacteria (PGPB) to minimize the toxicity concentration of HM at optimum levels for the environmental clean-up. Rhizospheric bacteria are employed for significant growth of plants in soil contaminated with HM. Exploitation of bacteria possessing plant-beneficial traits as well as metal detoxifying property is an economical and promising approach for bioremediation of HM. Microbial cells exhibit different mechanisms of HM resistance such as active transport, extra cellular barrier, extracellular and intracellular sequestration, and reduction of HM. Tolerance of HM in microorganisms may be chromosomal or plasmid originated. Proteins such as
    Language English
    Publishing date 2023-07-24
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1229828
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  8. Article: Exploring microbial diversity responses in agricultural fields: a comparative analysis under pesticide stress and non-stress conditions.

    Gangola, Saurabh / Joshi, Samiksha / Bhandari, Geeta / Pant, Garima / Sharma, Anita / Perveen, Kahkashan / Bukhari, Najat A / Rani, Ranjana

    Frontiers in microbiology

    2023  Volume 14, Page(s) 1271129

    Abstract: Exposure to pesticides changes the microbial community structure in contaminated agricultural fields. To analyze the changes in the native microbial composition qRT-PCR, a metagenomic study was conducted. The qRT-PCR results exhibited that the ... ...

    Abstract Exposure to pesticides changes the microbial community structure in contaminated agricultural fields. To analyze the changes in the native microbial composition qRT-PCR, a metagenomic study was conducted. The qRT-PCR results exhibited that the uncontaminated soil has a higher copy number of 16S rDNA relative to the soil contaminated with pesticide. Metagenome analysis interprets that uncontaminated soil is enriched with proteobacteria in comparison with pesticide-contaminated soil. However, the presence of Actinobacteria, Firmicutes, and Bacteroides was found to be dominant in the pesticide-spiked soil. Additionally, the presence of new phyla such as Chloroflexi, Planctomycetes, and Verrucomicrobia was noted in the pesticide-spiked soil, while Acidobacteria and Crenarchaeota were observed to be extinct. These findings highlight that exposure to pesticides on soil significantly impacts the biological composition of the soil. The abundance of microbial composition under pesticide stress could be of better use for the treatment of biodegradation and bioremediation of pesticides in contaminated environments.
    Language English
    Publishing date 2023-10-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1271129
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  9. Article: Novel mechanism and degradation kinetics of pesticides mixture using Bacillus sp. strain 3C in contaminated sites

    Gangola, Saurabh / Sharma, Anita / Joshi, Samiksha / Bhandari, Geeta / Prakash, Om / Govarthanan, Muthusamy / Kim, Woong / Bhatt, Pankaj

    Pesticide biochemistry and physiology. 2022 Feb., v. 181

    2022  

    Abstract: The present study has investigated the potential of Bacillus sp. strain 3C able to degrade mixture of pesticides from the environment. It showed maximum tolerance up to 450 mg·L⁻¹ for cypermethrin, fipronil, imidacloprid and sulfosulfuron. The strain 3C ... ...

    Abstract The present study has investigated the potential of Bacillus sp. strain 3C able to degrade mixture of pesticides from the environment. It showed maximum tolerance up to 450 mg·L⁻¹ for cypermethrin, fipronil, imidacloprid and sulfosulfuron. The strain 3C was able to degrade up to the 94% of mixture of pesticides (20 mg·L⁻¹) within 15 days of experiment. The Box-Behnken design of Response Surface Methodology (RSM) determined the optimized conditions as; inoculum size 3.0 × 10⁷ CFU·mL⁻¹, shaking speed 120 rpm, and pesticides concentration 80 mg·L⁻¹. In soil-based bioremediation with strain 3C after 15 days degradation pattern was; 99, 94, 92, 92 and 7% for the imidacloprid, sulfosulfuron, fipronil, cypermethrin and control respectively. The novel intermediate metabolites for cypermethrin degradation were investigated as decyl isobutyl ester, phthalic acid, cyclopropane carboxylic acid tri dec-2-ynyl ester, 9- octadecanal, tridecane, propanoic acid, cyclohexene, bicyclo[2.2.1] heptan-2-ol, and acetic acid were identified using Gas chromatography Mass Spectrometry (GC–MS) with strain 3C. Moreover, the results of the laccase based enzymatic kinetics suggested that the rate of production was maximum in pesticides stress (94 μg·μL⁻¹) whereas, in normal condition 51 μg·μL⁻¹. The Kₘ value found to be decreased in pesticides stress condition 12.25 and increment in Kₘ 13.58 mM was observed without stress. Furthermore, aldehyde dehydrogenase (ALDH) and laccase encoding genes were amplified and linked with mixture of pesticides bioremediation. The efficiency of bacterial strain 3C, could be used for bioremediation of mixture of pesticides, and other xenobiotic compounds from the contaminated environments.
    Keywords Bacillus (bacteria) ; acetic acid ; aldehyde dehydrogenase ; bioremediation ; cyclohexenes ; cypermethrin ; experimental design ; fipronil ; gas chromatography-mass spectrometry ; imidacloprid ; inoculum ; laccase ; metabolites ; phthalic acid ; physiology ; propionic acid ; response surface methodology ; xenobiotics
    Language English
    Dates of publication 2022-02
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 184819-7
    ISSN 1095-9939 ; 0048-3583 ; 0048-3575
    ISSN (online) 1095-9939
    ISSN 0048-3583 ; 0048-3575
    DOI 10.1016/j.pestbp.2021.104996
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  10. Article: Biotechnological tools to elucidate the mechanism of pesticide degradation in the environment

    Gangola, Saurabh / Bhatt, Pankaj / Kumar, Alagarasan Jagadeesh / Bhandari, Geeta / Joshi, Samiksha / Punetha, Arjita / Bhatt, Kalpana / Rene, Eldon R.

    Chemosphere. 2022 June, v. 296

    2022  

    Abstract: Pesticides are widely used in agriculture, households, and industries; however, they have caused severe negative effects on the environment and human health. To clean up pesticide contaminated sites, various technological strategies, i.e. physicochemical ...

    Abstract Pesticides are widely used in agriculture, households, and industries; however, they have caused severe negative effects on the environment and human health. To clean up pesticide contaminated sites, various technological strategies, i.e. physicochemical and biological, are currently being used throughout the world. Biological approaches have proven to be a viable method for decontaminating pesticide-contaminated soils and water environments. The biological process eliminates contaminants by utilizing microorganisms' catabolic ability. Pesticide degradation rates are influenced by a variety of factors, including the pesticide's structure, concentration, solubility in water, soil type, land use pattern, and microbial activity in the soil. There is currently a knowledge gap in this field of study because researchers are unable to gather collective information on the factors affecting microbial growth, metabolic pathways, optimal conditions for degradation, and genomic, transcriptomic, and proteomic changes caused by pesticide stress on the microbial communities. The use of advanced tools and omics technology in research can bridge the existing gap in our knowledge regarding the bioremediation of pesticides. This review provides new insights on the research gaps and offers potential solutions for pesticide removal from the environment through the use of various microbe-mediated technologies.
    Keywords bioremediation ; genomics ; human health ; land use ; microbial growth ; pesticide degradation ; pesticides ; proteomics ; solubility ; transcriptomics
    Language English
    Dates of publication 2022-06
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.133916
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