Assessment of plant growth promoting rhizobacteria (PGPR) on potential biodegradation of glyphosate in contaminated soil and aquifers

Wijekoon, Nivanthi; Yapa, Neelamanie

doi:10.1016/j.gsd.2018.02.001

Cited by 21 publications

(14 citation statements)

References 17 publications

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“…Generally, the microorganisms resistant to pesticide have a great potential to break the pesticides into simple products, which may be used by them as nutrient sources, such as carbon and phosphorus (Cassigneul et al, 2016;Myresiotis et al, 2012;Bellinaso et al, 2003). According to the results of (Wijekoon et al, 2018) which have shown that Pseudomonas sp. and Bacillus sp.…”

Section: Resultsmentioning

confidence: 99%

Assessment of the resistance of four nitrogen-fixing Bacteria to glyphosate

Ibijbijen

Maldani

Messaoud

et al. 2018

AJB

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The presence of residual pesticides in the soil affect the microbial Communities, as well the continuous use of pesticides exacerbates this problem. Glyphosate is one of the most used herbicides in the world. Up to date several studies have evaluated the tolerance and resistance of bacteria to glyphosate. Nitrogen-fixing bacteria play an important role in soil fertility; thus, the alteration of these bacterial communities decrease soil fertility. The objective of this study was to evaluate the effect of glyphosate application on four bacterial strains Pantoea agglomerans, Rhizobium nepotum, Rhizobium radiobacter, and Rhizobium tibeticum. Glyphosate was applied as the sole source of carbon at the rate (0 g/l, 0.5 g/l, 1g/l, 3g/l, 6g/l and 12 g/l) with two methods. Microbial growth was measured by the Colony Forming Units (CFUs /ml) method. Comparing with the control, our results showed that the growth of the four strains decreased by increasing the concentration of glyphosate. The four strains have shown resistance to glyphosate in the direct enrichment compared to the continued enrichment method. Comparing strains with each other, Rhizobium radiobacter is the most resistant strain to glyphosate.

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Section: Resultsmentioning

confidence: 99%

Assessment of the resistance of four nitrogen-fixing Bacteria to glyphosate

Ibijbijen

Maldani

Messaoud

et al. 2018

AJB

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“…The inhibitory effect at standard field application rates may, therefore, be prolonged, as noted in corn and soybean crop [ 44 ]. Rhizosphere microorganisms are reported to tolerate glyphosate at concentrations up to 250 mg mL −1 [ 45 ]. Wilkes et al [ 4 ] found that glyphosate applied at a rate equivalent to 10 mg mL −1 inhibited AM fungi growth.…”

Section: Discussionmentioning

confidence: 99%

The Tripartite Rhizobacteria-AM Fungal-Host Plant Relationship in Winter Wheat: Impact of Multi-Species Inoculation, Tillage Regime and Naturally Occurring Rhizobacteria Species

Wilkes

Warner

Edmonds-Brown

et al. 2021

Plants

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Soils and plant root rhizospheres have diverse microorganism profiles. Components of this naturally occurring microbiome, arbuscular mycorrhizal (AM) fungi and plant growth promoting rhizobacteria (PGPR), may be beneficial to plant growth. Supplementary application to host plants of AM fungi and PGPR either as single species or multiple species inoculants has the potential to enhance this symbiotic relationship further. Single species interactions have been described; the nature of multi-species tripartite relationships between AM fungi, PGPR and the host plant require further scrutiny. The impact of select Bacilli spp. rhizobacteria and the AM fungus Rhizophagus intraradices as both single and combined inoculations (PGPR[i] and AMF[i]) within field extracted arable soils of two tillage treatments, conventional soil inversion (CT) and zero tillage (ZT) at winter wheat growth stages GS30 and GS39 have been conducted. The naturally occurring soil borne species (PGPR[s] and AMF[s]) have been determined by qPCR analysis. Significant differences (p < 0.05) were evident between inocula treatments and the method of seedbed preparation. A positive impact on wheat plant growth was noted for B. amyloliquefaciens applied as both a single inoculant (PGPR[i]) and in combination with R. intraradices (PGPR[i] + AMF[i]); however, the two treatments did not differ significantly from each other. The findings are discussed in the context of the inocula applied and the naturally occurring soil borne PGPR[s] present in the field extracted soil under each method of tillage.

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“…The biodegradation of glyphosate through the use of microorganisms has been considered a safe, low-cost, and reliable alternative to removing this xenobiotic from water and soil [140]. In this case, glyphosate degradation occurs because species of bacteria and fungi can use this compound as a source of nitrogen, carbon, and phosphorus, transforming it into new compounds through different degradation pathways [142,143]. Among the microorganisms (bacteria and fungi) used for the biological degradation of glyphosate are Achromobacter spp., Agrobacterium radiobacter, Alcaligenes sp.…”

Section: Glyphosate Biodegradation Alternativesmentioning

confidence: 99%

Glyphosate Pollution Treatment and Microbial Degradation Alternatives, a Review

et al. 2021

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Glyphosate is a broad-spectrum herbicide extensively used worldwide to eliminate weeds in agricultural areas. Since its market introduction in the 70’s, the levels of glyphosate agricultural use have increased, mainly due to the introduction of glyphosate-resistant transgenic crops in the 90’s. Glyphosate presence in the environment causes pollution, and recent findings have proposed that glyphosate exposure causes adverse effects in different organisms, including humans. In 2015, glyphosate was classified as a probable carcinogen chemical, and several other human health effects have been documented since. Environmental pollution and human health threats derived from glyphosate intensive use require the development of alternatives for its elimination and proper treatment. Bioremediation has been proposed as a suitable alternative for the treatment of glyphosate-related pollution, and several microorganisms have great potential for the biodegradation of this herbicide. The present review highlights the environmental and human health impacts related to glyphosate pollution, the proposed alternatives for its elimination through physicochemical and biological approaches, and recent studies related to glyphosate biodegradation by bacteria and fungi are also reviewed. Microbial remediation strategies have great potential for glyphosate elimination, however, additional studies are needed to characterize the mechanisms employed by the microorganisms to counteract the adverse effects generated by the glyphosate exposure.

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Assessment of plant growth promoting rhizobacteria (PGPR) on potential biodegradation of glyphosate in contaminated soil and aquifers

Cited by 21 publications

References 17 publications

Assessment of the resistance of four nitrogen-fixing Bacteria to glyphosate

Assessment of the resistance of four nitrogen-fixing Bacteria to glyphosate

The Tripartite Rhizobacteria-AM Fungal-Host Plant Relationship in Winter Wheat: Impact of Multi-Species Inoculation, Tillage Regime and Naturally Occurring Rhizobacteria Species

Glyphosate Pollution Treatment and Microbial Degradation Alternatives, a Review

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