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Phenotype to genotype in Neurospora crassa: Association of the scumbo phenotype with mutations in the gene encoding ceramide C9-methyltransferase. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100117. [PMID: 35909622 PMCID: PMC9325734 DOI: 10.1016/j.crmicr.2022.100117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Zhang C, Li J, An H, Wu X, Wu Y, Long Y, Li R, Xing D. Enhanced elimination of dimethachlon from soils using a novel strain Brevundimonas naejangsanensis J3. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 255:109848. [PMID: 31756580 DOI: 10.1016/j.jenvman.2019.109848] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/08/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
Dimethachlon is a hazardous xenobiotic which poses a potential risk on the ecosystem and human health after foliar spray for mitigating fungal diseases of crops. A novel dimethachlon-degrading strain was isolated and identified as Brevundimonas naejangsanensis J3. Free cells and enzymes of this strain could rapidly eliminate 75 mg/L dimethachlon in liquid medium, especially the latter (>90% of degradation efficiency). Strain J3 completely metabolized dimethachlon by an ideally transformed pathway. Immobilization cells and enzymes exhibited better stability and adaptability for the repeated use, as compared with free cells and enzymes. In laboratory, 68.03 and 65.13%, or 82.67 and 95.41% of dimethachlon were eliminated from non-sterile soils by free or immobilized cells and enzymes within 7 d, respectively. Under the field condition, 95.78 and 98.01% of 20.250 kg a.i./ha dimethachlon wettable powder from soils were degraded by immobilized cells and enzymes in 9 d respectively, which were significant higher than the degradation efficiencies of free cells and enzymes (78.81 and 67.25%). This study highlights immobilized cells and enzymes from strain J3 can be applicable for bioremediating dimethachlon-contaminated soils.
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Affiliation(s)
- Cheng Zhang
- College of Agricultural Equipment and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China; Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China
| | - Jiaohong Li
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Huaming An
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Xiaomao Wu
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China.
| | - Yanyou Wu
- Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China.
| | - Youhua Long
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Rongyu Li
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Deke Xing
- College of Agricultural Equipment and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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Zhang C, Pan X, Wu X, Dong F, Liu X, Xu J, Wu X, Li M, Zheng Y. Removal of dimethachlon from soils using immobilized cells and enzymes of a novel potential degrader Providencia stuartii JD. JOURNAL OF HAZARDOUS MATERIALS 2019; 378:120606. [PMID: 31326122 DOI: 10.1016/j.jhazmat.2019.04.089] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 06/10/2023]
Abstract
The first potential degrader capable of detoxifying dimethachlon (NDPS) was isolated and identified as Providencia stuartii JD, whose free cells and freely crude enzymes degraded more than 80% and 90% of 50 mg L-1 NDPS in liquid culture within 7 d and 2 h, respectively. Strain JD metabolized NDPS through the typical pathway, in which NDPS was firstly transformed into succinic acid and 3, 5-dichloroanilin, and the latter was then converted to phenol, which was subsequently degraded to muconic acid further subjected to the mineralization. The immobilization obviously improved the stability and adaptability of cells and enzymes. In laboratory non-sterile soils treated by free or immobilized cells and enzymes, 50 mg kg-1 NDPS decreased to 15.66 and 13.32 mg kg-1, or 8.32 and 2.18 mg kg-1 within 7 d, respectively. In field, immobilized cells and enzymes exhibited significantly higher efficiencies in removing 20.250 kg a.i. ha-1 NDPS wettable powder from soils after 9 d (96.02% and 98.56%) than free cells and enzymes (79.35% and 66.45%). This study highlights that strain JD promises the great potential to remove hazardous NDPS residues and its immobilized cells and enzymes possess the more promising advantages in the bioremediation of NDPS-contaminated soils in situ.
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Affiliation(s)
- Cheng Zhang
- Department of Plant Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, PR China
| | - Xinglu Pan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xiaomao Wu
- Department of Plant Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, PR China.
| | - Fengshou Dong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xingang Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Jun Xu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xiaohu Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Ming Li
- Department of Plant Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, PR China
| | - Yongquan Zheng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
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Jespers ABK, De Waard MA. Effect of fenpiclonil on phosphorylation of glucose inFusarium sulphureum. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/ps.2780440210] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cui W, Beever RE, Parkes SL, Weeds PL, Templeton MD. An osmosensing histidine kinase mediates dicarboximide fungicide resistance in Botryotinia fuckeliana (Botrytis cinerea). Fungal Genet Biol 2002; 36:187-98. [PMID: 12135574 DOI: 10.1016/s1087-1845(02)00009-9] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A two-component histidine protein kinase gene, homologous to os-1 from Neurospora crassa, was cloned and sequenced from a single ascospore isolate of Botryotinia fuckeliana. A series of nine spontaneous mutants resistant to dicarboximide fungicides was selected from this strain and characterized with respect to fungicide resistance and osmotic sensitivity. Genetic crosses of the mutants with an authentic Daf1 strain showed that the phenotypes mapped to this locus. Single point mutations (seven transitions, one transversion, and one short deletion) were detected in the alleles of the nine mutants sequenced. The mutational changes were shown to cosegregate with the dicarboximide resistance and osmotic sensitivity phenotypes in progeny obtained from crossing selected resistant strains with a sensitive strain. All mutations detected are predicted to result in amino acid changes in the coiled-coil region of the putative Daf1 histidine kinase, and it is proposed that dicarboximide fungicides target this domain.
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Affiliation(s)
- Wei Cui
- Plant Health and Development Group, The Horticulture and Food Research Institute of New Zealand Ltd., Private Bag 92 169, Auckland, New Zealand
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Oshima M, Fujimura M, Banno S, Hashimoto C, Motoyama T, Ichiishi A, Yamaguchi I. A Point Mutation in the Two-Component Histidine Kinase BcOS-1 Gene Confers Dicarboximide Resistance in Field Isolates of Botrytis cinerea. PHYTOPATHOLOGY 2002; 92:75-80. [PMID: 18944142 DOI: 10.1094/phyto.2002.92.1.75] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
ABSTRACT Partial DNA fragments of Botrytis cinerea field isolates encoding the putative osmosensor histidine kinase gene (BcOS1) were cloned by polymerase chain reaction amplification and the predicted amino acid sequences were compared between dicarboximide-sensitive and resistant field isolates. The predicted BcOS1p is highly homologous to osmosensor histidine kinase OS1p from Neurospora crassa including the N-terminal six tandem repeats of approximately 90 amino acids. Four dicarboximide-resistant isolates of B. cinerea (Bc-19, Bc-45, Bc-682, and Bc-RKR) contained a single base pair mutation in their BcOS1 gene that resulted in an amino acid substitution in the predicted protein. In these resistant isolates, codon 86 of the second repeat, which encodes an isoleucine residue in sensitive strains, was converted to a codon for serine. The mutation of Botrytis field resistant isolates was located on the second unit of tandem amino acid repeats of BcOS1p, whereas the point mutations of the fifth repeat of OS1p confer resistance to both dicarboximides and phenylpyrroles and also osmotic sensitivity in Neurospora crassa. These results suggest that an amino acid substitution within the second repeat of BcOS1p is responsible for phenotypes of field resistant isolates (resistant to dicarboximides but sensitive to phenylpyrroles, and normal osmotic sensitivity) in B. cinerea.
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Shakoori AR, Muneer B. Copper-resistant bacteria from industrial effluents and their role in remediation of heavy metals in wastewater. Folia Microbiol (Praha) 2002; 47:43-50. [PMID: 11980269 DOI: 10.1007/bf02818564] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Six copper-resistant bacterial strains were isolated from wastewater of tanneries of Kasur and Rohi Nala. Two strains tolerated copper at 380 mg/L, four up to 400 mg/L. Three strains were identified as members of the genus Salmonella; one strain was identified as Streptococcus pyrogenes, one as Vagococcus fluvialis and the last was identified as Escherichia coli. The pH and temperature optimum for two of them were 7.0 and 30 degrees C, respectively; four strains had corresponding optima at 7.5 and 37 degrees C, respectively. All bacterial isola-tes showed resistance against Ag+ (280-350 mg/L), Co2+ (200-420), CrVI (280-400), Cd2+ (250-350), Hg2+ (110-200), Mn2+ (300-380), Pb2+ (300-400), Sn2+ (480-520) and Zn2+ (300-450). Large-sized plasmids (> 20 kb), were detected in all of the strains. After the isolates were cured of plasmids with ethidium bromide, the efficiency of curing was estimated in the range of 60-90%. Reference strain of E. coli was transformed with the plasmids of the bacterial isolates which grew in Luria-Bertani medium containing 100 mg/L Cu2+. The capability to adsorb and afterwards accumulate Cu2+ inside their cells was assayed by atomic absorption spectrophotometer; all bacterial cells had the ability to adsorb 50-80% of the Cu2+ and accumulate 30-45% Cu2+ inside them after 1 d of incubation.
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Affiliation(s)
- A R Shakoori
- Cell and Molecular Biology Laboratory, Department of Zoology, University of the Punjab, New Campus, Lahore 54590, Pakistan.
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Ramesh MA, Laidlaw RD, Dürrenberger F, Orth AB, Kronstad JW. The cAMP signal transduction pathway mediates resistance to dicarboximide and aromatic hydrocarbon fungicides in Ustilago maydis. Fungal Genet Biol 2001; 32:183-93. [PMID: 11343404 DOI: 10.1006/fgbi.2001.1258] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cAMP signal transduction pathway mediates the switch between yeast-like and filamentous growth and influences both sexual development and pathogenicity in the smut fungus Ustilago maydis. Signaling via cAMP may also play a role in fungicide resistance in U. maydis. In particular, the adr1 gene, which encodes the catalytic subunit of the U. maydis cAMP-dependent protein kinase (PKA), is implicated in resistance to the dicarboximide and aromatic hydrocarbon fungicides. In this study, we examined the sensitivity of PKA to vinclozolin and could not demonstrate direct inhibition of protein kinase activity. However, we did find that mutants with disruptions in the ubc1 gene, which encodes the regulatory subunit of PKA, were resistant to both vinclozolin and chloroneb. We also found that these fungicides altered the morphology of both wild-type and ubc1 mutant cells. In addition, strains that are defective in ubc1 display osmotic sensitivity, a property often associated with vinclozolin and chloroneb resistance in other fungi.
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Affiliation(s)
- M A Ramesh
- Biotechnology Laboratory, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada
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Selection and characterization of crystalviolet-and malachite-green-resistant mutants in Volvariella volvacea. World J Microbiol Biotechnol 1991; 7:541-50. [DOI: 10.1007/bf00368358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/1990] [Revised: 03/18/1991] [Accepted: 03/25/1991] [Indexed: 10/26/2022]
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Faretra F, Pollastro S. Genetic basis of resistance to benzimidazole and dicarboximide fungicides in Botryotinia fuckeliana (Botrytis cinerea). ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0953-7562(09)80091-9] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ellis S, Grindle M, Lewis D. Effect of osmotic stress on yield and polyol content of dicarboximide-sensitive and -resistant strains of Neurospora crassa. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0953-7562(09)80846-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Grindle M, Dolderson G. Effects of a modifier gene on the phenotype of a dicarboximide-resistant mutant of Neurospora crassa. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/s0007-1536(86)80223-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sporulation and osmotic sensitivity of dicarboximide-resistant mutants of Neurospora crassa. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/s0007-1536(85)80097-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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