The potential of oil-utilizing bacterial consortia associated with legume root nodules for cleaning oily soils

Dashti, Narjes; Khanafer, Majida; El-Nemr, Israa; Sorkhoh, N.A.; Ali, N.; Radwan, S. S.

doi:10.1016/j.chemosphere.2008.11.028

Cited by 59 publications

(24 citation statements)

References 14 publications

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“…In our results, cowpea with nodulated roots eliminated more PAH from the surrounding water than nodule-free roots. Dashti et al (2009)studied oil attenuation by nodulated roots and revealed that legumes with nodulated roots eliminated more oil from the liquid culture than nodule-free roots, which showed consistency with our result. There are two reasons may account for this phenomenon.…”

Section: Discussionsupporting

confidence: 94%

Study of phenanthrene utilizing bacterial consortia associated with cowpea (Vigna unguiculata) root nodules

Sun

Crowley

Wei

2015

World J Microbiol Biotechnol

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Many legumes have been selected as model plants to degrade organic contaminants with their special associated rhizosphere microbes in soil. However, the function of root nodules during microbe-assisted phytoremediation is not clear. A pot study was conducted to examine phenanthrene (PHE) utilizing bacteria associated with root nodules and the effects of cowpea root nodules on phytoremediation in two different types of soils (freshly contaminated soil and aged contaminated soil). Cowpea nodules in freshly-contaminated soil showed less damage in comparison to the aged-contaminated soil, both morphologically and ultra-structurally by scanning electron microscopy. The study of polycyclic aromatic hydrocarbon (PAH) attenuation conducted by high performance liquid chromatography revealed that more PAH was eliminated from liquid culture around nodulated roots than nodule-free roots. PAH sublimation and denaturation gradient gel electrophoresis were applied to analyze the capability and diversity of PAH degrading bacteria from the following four parts of rhizo-microzone: bulk soil, root surface, nodule surface and nodule inside. The results indicated that the surface and inside of cowpea root nodules were colonized with bacterial consortia that utilized PHE. Our results demonstrated that root nodules not only fixed nitrogen, but also enriched PAH-utilizing microorganisms both inside and outside of the nodules. Legume nodules may have biotechnological values for PAH degradation.

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Section: Discussionsupporting

confidence: 94%

Study of phenanthrene utilizing bacterial consortia associated with cowpea (Vigna unguiculata) root nodules

Sun

Crowley

Wei

2015

World J Microbiol Biotechnol

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“…However, the fact that those organisms grew also on individual pure aliphatic and aromatic hydrocarbons confirms and consolidates their true diazotrophy. In the literature, there are some earlier reports on such bacteria in soil (Perez-Vargas et al 2000;Eckford et al 2002;Prantera et al 2002;Sorkhoh et al 2010b;Dashti et al 2009;Al-Mailem et al 2010). It is selfexplanatory that all these localities, like all others in nature, harbor, in addition, classic, diazotrophic, nonhydrocarbonutilizing bacteria.…”

Section: Discussionmentioning

confidence: 91%

Indigenous hydrocarbon-utilizing bacterioflora in oil-polluted habitats in Kuwait, two decades after the greatest man-made oil spill

et al. 2012

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Kuwaiti habitats with two-decade history of oil pollution were surveyed for their inhabitant oil-utilizing bacterioflora. Seawater samples from six sites along the Kuwaiti coasts of the Arabian Gulf and desert soil samples collected from seven sites all over the country harbored oil-utilizing bacteria whose numbers made up 0.0001-0.01% of the total, direct, microscopic counts. The indigenous bacterioflora in various sites were affiliated to many species. This was true when counting was made on nitrogen-containing and nitrogen-free media. Seawater samples harbored species belonging predominantly to the Gammaproteobacteria and desert soil samples contained predominantly Actinobacteria. Bacterial species that grew on the nitrogen-free medium and that represented a considerable proportion of the total in all individual bacterial consortia were diazotrophic. They gave positive acetylene-reduction test and possessed the nifH genes in their genomes. Individual representative species could utilize a wide range of aliphatic and aromatic hydrocarbons, as sole sources of carbon and energy. Quantitative determination showed that the individual species consumed crude oil, n-octadecane and phenanthrene, in batch cultures. It was concluded that the indigenous microflora could be involved in bioremediation programs without bioaugmentation or nitrogen fertilization. Irrigation would be the most important practice in bioremediation of the polluted soil desert areas.

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“…Moore et al (2006) demonstraram que várias estirpes endofíticas, isoladas de dois cultivares de choupo, usados na remediação in situ de BTEX, apresentaram potencial para incrementar a fitorremediação, por sua capacidade de degradar compostos BTEX ou de crescer na presença do TCE. Dashti et al (2009) comprovaram que as leguminosas Vicia faba L. e Lupinus albus L., que apresentavam nódulos radiculares colonizados com bactérias, apresentaram maior potencial de fitorremediação de solos pobres contaminados com óleo.…”

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Associação de Rhizobium sp. a duas leguminosas na tolerância à atrazina

2011

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Association of Rhizobium sp. with two legumes on atrazine toleranceThe association of bacteria with plants has been studied as a possible emerging technology for phytoremediation of contaminants, including herbicides, which pose as a threatening to environmental quality due to their recalcitrance. The aim of this study was to assess the tolerance of dwarf mucuna (Stizolobium deeringianum Bort) and black mucuna (Stizolobium aterrimum Piper & Tracy) inoculated and uninoculated with Rhizobium to the herbicide atrazine. The treatments were: plants with inoculant + 0.1 g/m 2 , 0.2 g/m 2 atrazine, and without atrazine (T1, T2 and T3, respectively), plants without inoculant + 0.1 g/m 2 , 0.2 g/m 2 atrazine and without atrazine (T4, T5 and T6, respectively). The experiment was arranged in a completely randomized design, with three replications. Plants were grown in a

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The potential of oil-utilizing bacterial consortia associated with legume root nodules for cleaning oily soils

Cited by 59 publications

References 14 publications

Study of phenanthrene utilizing bacterial consortia associated with cowpea (Vigna unguiculata) root nodules

Study of phenanthrene utilizing bacterial consortia associated with cowpea (Vigna unguiculata) root nodules

Indigenous hydrocarbon-utilizing bacterioflora in oil-polluted habitats in Kuwait, two decades after the greatest man-made oil spill

Associação de Rhizobium sp. a duas leguminosas na tolerância à atrazina

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