Changes in soil microbial community and activity caused by application of dimethachlor and linuron

Medo, Juraj; Maková, Jana; Medová, Janka; Lipková, Nikola; Cinkocki, Renata; Omelka, Radoslav; Javoreková, Soňa

doi:10.1038/s41598-021-91755-6

Cited by 28 publications

(7 citation statements)

References 60 publications

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“…Soil organic carbon (SOC), phosphorus, nitrogen, potassium and other essential micronutrients significantly affect the activities of the soil enzymes 44 . In the present study Fluorescein diacetate (FDA) and Dehydrogenase activity correlated with culturable microbial population or respiratory metabolism 45 . The dehydrogenase and FDA activities were higher in Shisham rhizosphere from Tanakpur where the aerobic bacterial population was also highest.…”

Section: Discussionmentioning

confidence: 81%

Functional characterization and molecular fingerprinting of potential phosphate solubilizing bacterial candidates from Shisham rhizosphere

Joshi

Gangola

Jaggi

et al. 2023

Sci Rep

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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 (Ca3(PO4)2 solubilization showing visible dissolution halo zones were identified. All 18 isolates showed zinc solubilization, indole acetic acid (IAA), siderophore, and hydrogen cyanide (HCN) production. The morphological and biochemical characterization with 16S rDNA gene-based phylogenetic analysis identified bacterial strains as belonging to the genus Pseudomonas, Klebsiella, Streptomyces, Pantoea, Kitasatospora, Micrococcus, and Staphylococcus. Among all the isolates, one of the isolates named L4, from Lacchiwala region was the most efficient P solubilizer with a high P solubilization index (4.75 ± 0.06) and quantitative P solubilization activity (891.38 ± 18.55 μg mL−1). The validation of phosphate solubilization activity of PSB isolates was done by amplification of the Pyrroloquinoline quinone (PQQ) genes, pqqA and pqqC. Based on this study, we have selected the bacterial strains which are efficient phosphate solubilizers and could be economical and eco-friendly in plant growth promotion, disease suppression, as an antioxidant, and for subsequent enhancement of yield.

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Section: Discussionmentioning

confidence: 81%

Functional characterization and molecular fingerprinting of potential phosphate solubilizing bacterial candidates from Shisham rhizosphere

Joshi

Gangola

Jaggi

et al. 2023

Sci Rep

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“…Medo et al. (2021) reported changes in soil microbial community activity by repeated application of dimethachlor and linuron. Biodegradation of phenylurea herbicide diuron was accomplished by the beta‐oxidation pathway by the soil bacteria (Li et al., 2021).…”

Section: Resultsmentioning

confidence: 99%

Biotransformation of metribuzin under various electron acceptor conditions

Phillips

Boopathy

2022

Environmental Quality Mgmt

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Metribuzin is a triazine herbicide used in sugarcane fields to control broadleaf weeds.Metribuzin that is washed into waterways as runoff can be linked to hermaphroditism in frogs as well as algal and macrophyte death. Metribuzin degradation by bacteria is essential to reduce the half-life of metribuzin in the environment. The objective of this study was to determine metribuzin degradation by various bacterial consortia developed from a sludge collected from a sewage treatment plant. The sludge was exposed to metribuzin under various electron acceptor conditions including, nitrate reducing, sulfate reducing, and mixed electron acceptor conditions. Results showed metribuzin was removed significantly under mixed electron acceptor condition when glucose served as a co-substrate followed by sulfate reducing and nitrate reducing conditions. The major metabolites identified in metribuzin degradation were desamino-metribuzin, diketo-metribuzin, and desamino-diketo-metribuzin. Repeated exposure to metribuzin may help the bacteria to adapt and evolve metribuzin degrading enzymes.

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“…Similar findings were reported by Kumari et al (2021) with fipronil and atrazine degradation using biochip mixed biomixtures. Medo et al (2021) reported reduced DHA and FDA activity with the application of two insecticides dimethachlor and linuron.…”

Section: Discussionmentioning

confidence: 99%

Mechanism and kinetics of chlorpyrifos co-metabolism by using environment restoring microbes isolated from rhizosphere of horticultural crops under subtropics

et al. 2022

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The indiscriminate use of organophosphate insecticide chlorpyrifos in agricultural crops causes significant soil and water pollution and poses a serious threat to the global community. In this study, a microbial consortium ERM C-1 containing bacterial strains Pseudomonas putida T7, Pseudomonas aeruginosa M2, Klebsiella pneumoniae M6, and a fungal strain Aspergillus terreus TF1 was developed for the effective degradation of chlorpyrifos. Results revealed that microbial strains were not only utilizing chlorpyrifos (500 mg L–1) but also coupled with plant growth-promoting characteristics and laccase production. PGP traits, that is, IAA (35.53, 45.53, 25.19, and 25.53 μg mL–1), HCN (19.85, 17.85, 12.18, and 9.85 μg mL–1), and ammonium (14.73, 16.73, 8.05, and 10.87 μg mL–1) production, and potassium (49.53, 66.72, 46.14, and 52.72 μg mL–1), phosphate (52.37, 63.89, 33.33, and 71.89 μg mL–1), and zinc (29.75, 49.75, 49.12, and 57.75 μg mL–1) solubilization tests were positive for microbial strains T7, M2, M6, and TF1, respectively. The laccase activity by ERM C-1 was estimated as 37.53, 57.16, and 87.57 enzyme U mL–1 after 5, 10, and 15 days of incubation, respectively. Chlorpyrifos degradation was associated with ERM C-1 and laccase activity, and the degree of enzyme activity was higher in the consortium than in individual strains. The biodegradation study with developed consortium ERM C-1 showed a decreased chlorpyrifos concentration from the 7th day of incubation (65.77% degradation) followed by complete disappearance (100% degradation) after the 30th day of incubation in the MS medium. First-order degradation kinetics with a linear model revealed a high k –day value and low t1/2 value in ERM C-1. The results of HPLC and GC-MS analysis proved that consortium ERM C-1 was capable of completely removing chlorpyrifos by co-metabolism mechanism.

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Changes in soil microbial community and activity caused by application of dimethachlor and linuron

Cited by 28 publications

References 60 publications

Functional characterization and molecular fingerprinting of potential phosphate solubilizing bacterial candidates from Shisham rhizosphere

Functional characterization and molecular fingerprinting of potential phosphate solubilizing bacterial candidates from Shisham rhizosphere

Biotransformation of metribuzin under various electron acceptor conditions

Mechanism and kinetics of chlorpyrifos co-metabolism by using environment restoring microbes isolated from rhizosphere of horticultural crops under subtropics

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