The use of transgenic canola (Brassica napus) and plant growth-promoting bacteria to enhance plant biomass at a nickel-contaminated field site

Farwell, Andrea J.; Vesely, Susanne; Nero, Vincent P.; Rodríguez, Humberto; Shah, Saleh; Dixon, D. George; Glick, Bernard R.

doi:10.1007/s11104-006-9119-y

Cited by 70 publications

(17 citation statements)

References 35 publications

(40 reference statements)

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“…The use of transgenic canola in conjunction with plant growth-promoting bacteria made phytoremediation much more efficient (Nie et al 2002). Similar results were reported by Stearns et al (2005) and Farwell et al (2006) in the phytoremediation of nickel contaminated soils. Meagher and Heaton (2005) evaluated the capability of Arabidopsis transgenic plants expressing bacterial metal resistance genes (merA, merB and arsC) to take up and transform levels of mercury and arsenic several times higher than the lethal level for most plant species.…”

Section: Plant Tolerance To Toxic Compounds and Transgenic Plants Witsupporting

confidence: 77%

Potential for the Use of Rhizobacteria in the Sustainable Management of Contaminated Soils

Andreoni

Zaccheo

2010

Plant Adaptation and Phytoremediation

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The removal of contaminants from the environments has become a crucial problem that requires a variety of approaches to reach suitable solutions. This review will focus on the use of rhizobacteria for restoration of sites cocontaminated with organic pollutants and heavy metals. While the first contaminants can be biodegraded to innocuous end products, metals are not biodegradable and must either be removed or stabilized within the site. Plant growth promoting rhizobacteria (PGPRs) represent a wide variety of soil bacteria which, when grown in association with a host plant result in stimulation of growth of their host also in a stressed environment. Plants, especially dicotyledons that are treated with ACC deaminase-containing PGPRs are more resistant to the deleterious effects of ethylene synthesized as a consequence of stressful conditions. In this review the use of PGPRs to assist plants in remediation processes is examined by discussing recent advances in bioaugmentation efforts. The effectiveness of the external manipulation of rhizosoil to overcome physical and chemical constraints to root establishment and to enhance pollutant removal is also examined. Finally, it is provided a summary of the recent advances in the potential for the use of transgenic plants and/ or microorganisms to remediate environmental contaminants. The complexity and diversity of plant/soil/microorganism systems require an integrated approach involving basic and applied researches in order to establish phytoremediation as a viable and attractive technology for efficient restoration of co-contaminated soils

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Section: Plant Tolerance To Toxic Compounds and Transgenic Plants Witsupporting

confidence: 77%

Potential for the Use of Rhizobacteria in the Sustainable Management of Contaminated Soils

Andreoni

Zaccheo

2010

Plant Adaptation and Phytoremediation

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“…In the field, both ACC deaminase-producing plant growthpromoting bacteria and transgenic plants that express a bacterial ACC deaminase gene under the control of a root-specific promoter grow better than nontransformed and untreated plants. Although many metal contaminants are present at high levels in the field, in this environment they are generally not especially bioavailable so that only a small fraction of the metals are taken up by the plants (Farwell et al 2006).…”

Section: Metal and Organic Contaminationmentioning

confidence: 99%

Promotion of plant growth by ACC deaminase-producing soil bacteria

et al. 2007

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Plant growth-promoting bacteria that contain the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase facilitate plant growth and development by decreasing plant ethylene levels, especially following a variety of environmental stresses. In this review, the physiological basis for this growth-promotion effect is examined in some detail. In addition, models are presented that endeavour to explain (i) the seemingly paradoxical effects of ethylene on a plant's response to stress, (ii) how the expression of this enzyme is transcriptionally regulated in many bacterial strains and (iii) how ACC deaminase-containing plant growth-promoting bacteria alter plant gene expression and positively modulate plant growth.

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“…In another study, under flood conditions, tomato plants inoculated with UW4’s acdS -containing bacterial strains showed a significant tolerance to flooding stress [13]. In addition, UW4 has been shown to enhance plant growth in the presence of flooding [14], heavy metals [15], cold [16], high concentrations of salt [16], and phytopathogens [17]–[18].…”

Section: Introductionmentioning

confidence: 97%

The Complete Genome Sequence of the Plant Growth-Promoting Bacterium Pseudomonas sp. UW4

et al. 2013

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The plant growth-promoting bacterium (PGPB) Pseudomonas sp. UW4, previously isolated from the rhizosphere of common reeds growing on the campus of the University of Waterloo, promotes plant growth in the presence of different environmental stresses, such as flooding, high concentrations of salt, cold, heavy metals, drought and phytopathogens. In this work, the genome sequence of UW4 was obtained by pyrosequencing and the gaps between the contigs were closed by directed PCR. The P. sp. UW4 genome contains a single circular chromosome that is 6,183,388 bp with a 60.05% G+C content. The bacterial genome contains 5,423 predicted protein-coding sequences that occupy 87.2% of the genome. Nineteen genomic islands (GIs) were predicted and thirty one complete putative insertion sequences were identified. Genes potentially involved in plant growth promotion such as indole-3-acetic acid (IAA) biosynthesis, trehalose production, siderophore production, acetoin synthesis, and phosphate solubilization were determined. Moreover, genes that contribute to the environmental fitness of UW4 were also observed including genes responsible for heavy metal resistance such as nickel, copper, cadmium, zinc, molybdate, cobalt, arsenate, and chromate. Whole-genome comparison with other completely sequenced Pseudomonas strains and phylogeny of four concatenated “housekeeping” genes (16S rRNA, gyrB, rpoB and rpoD) of 128 Pseudomonas strains revealed that UW4 belongs to the fluorescens group, jessenii subgroup.

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The use of transgenic canola (Brassica napus) and plant growth-promoting bacteria to enhance plant biomass at a nickel-contaminated field site

Cited by 70 publications

References 35 publications

Potential for the Use of Rhizobacteria in the Sustainable Management of Contaminated Soils

Potential for the Use of Rhizobacteria in the Sustainable Management of Contaminated Soils

Promotion of plant growth by ACC deaminase-producing soil bacteria

The Complete Genome Sequence of the Plant Growth-Promoting Bacterium Pseudomonas sp. UW4

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