Raoultella planticola, a new strain degrading 2,4,5-trichlorophenoxyacetic acid

Zharikova, N. V.; Markusheva, T. V.; Galkin, E. G.; Korobov, V. V.; Zhurenko, E. Yu.; Sitdikova, L. R.; Колганова, Т. В.; Кузнецов, Б. Б.; Turova, T P

doi:10.1134/s0003683806030069

Cited by 10 publications

(3 citation statements)

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“…Raoultella, a new genus defined recently, contains strains showing a potential as biocatalysts for bioremediation of aromatic hydrocarbons (ie. 2, 4, 6-trinitrotoluene (TNT), 2, 4, 5-trichlorophenoxyacetic acid, and benzoic acid) and even opportunistic pathogens found in the environment (Drancourt et al 2001;Zharikova et al 2006;Claus et al 2007). Although dimethoate catabolism has been reported in various microorganisms, there is no example in Raoultella.…”

Section: Discussionmentioning

confidence: 98%

Co-metabolic degradation of dimethoate by Raoultella sp. X1

et al. 2008

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A bacterium Raoultella sp. X1, based on its 16S rRNA gene sequence, was isolated. Characteristics regarding the bacterial morphology, physiology, and genetics were investigated with an electron microscopy and conventional microbiological techniques. Although the isolate grew and degraded dimethoate poorly when the chemical was used as a sole carbon and energy source, it was able to remove up to 75% of dimethoate via co-metabolism. With a response surface methodology, we optimized carbon, nitrogen and phosphorus concentrations of the media for dimethoate degradation. Raoultella sp. X1 has a potential to be a useful organism for dimethoate degradation and a model strain for studying this biological process at the molecular level.

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Section: Discussionmentioning

confidence: 98%

Co-metabolic degradation of dimethoate by Raoultella sp. X1

et al. 2008

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“…Exiguobacterium can use small-molecule carbon sources, such as glucose for anaerobic respiration, and it is capable of degrading smallmolecule organic matter in water bodies [53,54]. Enterobacteriaceae are well adapted to their environments and can reduce nitrate to nitrite [55], which is then further converted into nitrogen by other denitrifying bacteria (Massilia) [53]. Figure 10 shows that the bacterial species and abundance in the lake water after the PF&W IC treatment changed significantly, with the most dominant bacterial types in the LWPF being Cyanobium PCC-6307 (31.2%) and Enterobacteriaceae (28.2%).…”

Section: Microbial Community Analysismentioning

confidence: 99%

Study of a New Photocatalytic Film Process Combined with a Constructed Wetland and an Analysis of Reoxygenation Pathways in a Water Body

Chen,

Ye,

Chen

et al. 2024

Sustainability

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Pollution in water environments hinders both social progress and economic development. Wastewater treatment and the sustainable use of water resources are important factors in solving this problem. In a previous study, the authors proposed a process that used photocatalytic film as a back-end treatment in a composite iron–carbon constructed wetland (WIC&PF) to restore a mildly eutrophic water body. This method has strong reoxygenation effects, and can efficiently remove pollutants; these are qualities that have not been mentioned in previous studies regarding constructed wetlands. In this study, the authors further investigated the effectiveness of this process by using a photocatalytic film as a front-end treatment for a composite iron–carbon constructed wetland (PF&WIC) to restore a mildly eutrophic water body. The results showed NH4+-N, TN, TP, COD, and chlorophyll a removal rates using PF&WIC of 79.1 ± 6.6%, 76.8 ± 6.5%, 77.0 ± 5.4%, 77.3 ± 7.2%, and 91.7 ± 5.6%, respectively. The DO concentration of the water body increased compared with that of the effluent. The bacterial species and their abundance in the lake water also changed significantly, and photosynthetic autotrophic bacteria (Cyanobium PCC-6307) became the most dominant bacteria, and this played an important role in reoxygenating the water body. In comparing these results to those of our previous study, the removal of pollutants with PF&WIC was close to that with WIC&PF, but the reoxygenation effect of PF&WIC on the water body was significantly worse than that of WIC&PF; thus, WIC&PF is the more reasonable choice for treating eutrophic water bodies.

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“…It is interesting to note that new microorganism strains can be isolated from microbial populations of soils that were exposed for a long time to factors related to petrochemical industry. For example, Zharikova et al (2006) isolated and characterized a representative of the species Raoultella planticola. This strain can consume 2,4,5-trichlorophenoxy acetic acid as its sole carbon and energy source.…”

mentioning

confidence: 99%