Survival of introduced phosphate-solubilizing bacteria (PSB) and their impact on microbial community structure during the phytoextraction of Cd-contaminated soil

Jeong, Seulki; Moon, Hee Sun; Shin, Dong Ju; Nam, Kyoungphile

doi:10.1016/j.jhazmat.2013.09.062

Cited by 62 publications

(24 citation statements)

References 47 publications

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“…Apart from the inoculated PGPR, the microbial population of the soil also plays a significant role in phytoremediation of heavy metals in contaminated soils by affecting heavy metal mobility, bioavailability to the plant, and enhancement of the phytoremediation processes (Jing et al 2007). Here, we adopted a pyrosequencing approach to elucidate the change of microbial community during phytoremediation in the Cdcontaminated soil, which is more sensitive than the previously reported PCR-DGGE method (Jeong et al 2013). This study demonstrated that the introduced PGPR had clear impacts on the microbial community structure and diversity (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, genus level analysis was also conducted to examine functional evolution of the community (Jeong et al 2013). The Gp3 Acidobacteria population was found to increase in the LCR1 and NSX2 treatments (1.57 and 1.84 %, respectively) compared to the uninnoculated soil (1.22 %).…”

Section: Isolation and Identification Of Cd-tolerant Pgprmentioning

confidence: 99%

“…The survival of introduced PGPR and subsequent changes to the rhizopshereassociated microbial community structure during phytoremediation of heavy metal-contaminated soils are considered to be key factors for successful phytoremediation (Jeong et al 2013;Piromyou et al 2011). Recently, molecular biology techniques (e.g., T-RFLP and PCR-denaturing gradient gel electrophoresis (DGGE)) have been applied to investigate the interactions between the heavy metal-resistant PGPR and the plant in heavy metal-contaminated soils (Chen et al 2013).…”

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confidence: 99%

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Plant growth-promoting rhizobacteria enhance the growth and Cd uptake of Sedum plumbizincicola in a Cd-contaminated soil

Liu

Wang

et al. 2015

J Soils Sediments

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Purpose This study aimed to isolate plant growth-promoting rhizobacteria (PGPR) that exhibit heavy metal resistance to examine their influence on Cd uptake and soil microbial community structure during phytoremediation. Materials and methods Heavy metal-tolerant PGPR were isolated from the roots of possible hyperaccumulators using plates with 1-aminocyclopropane-1-carboxylate (ACC) as sole nitrogen source. Minimal inhibitory concentrations (MICs) of each isolate were determined by the plate dilution method. The impacts of isolated PGPR on the growth and Cd accumulation of Sedium plumbizincicola were conducted in a pot experiment. In addition, the effect of PGPR inoculation on the microbial community during phytoextraction by S. plumbizincicola was studied by 454 pyrosequencing. Results and discussion A total of nine Cd-resistant strains were isolated from the roots of Cd accumulators, and their plant growth-promoting activities were characterized. Isolates were able to produce indole-3-acetic acid (IAA) (28-133 mg L − 1 ) and solubilize phosphate (65-). In a pot experiment, the inoculation of isolates NSX2 and LCR1 significantly enhanced the growth of and u p t a k e o f C d b y t h e C d h y p e r a c c u m u l a t o r S. plumbizincicola. 454 pyrosequencing revealed that the inoculation of the PGPR lead to a decrease in microbial community diversity in the rhizopshere during phytoextraction. Specifically, indigenous heavy metal-tolerant PGPR such as Actinospica, Bradyrhizobium, Rhizobium, Mesorhizobium, and Mycobacterium were selectively enriched in the treatments in which PGPR were added. It is suggested that a unique constitution of microbial communities in inoculated t r e a t m e n t s p l a y s a k e y r o l e i n e n h a n c i n g C d phytoremediation. Conclusion Inoculation of strains Rhodococcus erythropolis NSX2 and Cedecea davisae LCR1 could promote S. plumbizincicola growth and enhance the remediation efficiency. The introduced PGPR could also affect the indigenous microbial community structure and the diversity in Cdcontaminated soil during phytoremediation.

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Section: Discussionmentioning

confidence: 99%

Section: Isolation and Identification Of Cd-tolerant Pgprmentioning

confidence: 99%

mentioning

confidence: 99%

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Plant growth-promoting rhizobacteria enhance the growth and Cd uptake of Sedum plumbizincicola in a Cd-contaminated soil

Liu

Wang

et al. 2015

J Soils Sediments

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“…Compared to un-inoculated controls, the inoculation of Brassica juncea with a P-solubilizing Bacillus spp. induced a 349% increase in plant dry weight after 8 weeks and a 148% increase in Cd concentration (Jeong et al 2013). However, reported increases in IAA content in the soil and the presence of a native soil microbial community make it difficult to attribute the experimental outcomes to P-solubilization alone.…”

Section: Improving Plant Nutrition and Mobilizing Metals To Enhance Pmentioning

confidence: 99%

Microbial associated plant growth and heavy metal accumulation to improve phytoextraction of contaminated soils

Wood

Tang

Franks

2016

Soil Biology and Biochemistry

107

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Utilizing plants to remediate heavy metal contaminated soils, a process known as phytoextraction, offers many advantages but has yet to reach levels of efficiency that would make the strategy economically viable. Inoculation of the plant rhizosphere with microorganisms is an established route to improving phytoextraction efficiency. In general, microorganisms can improve phytoextraction by increasing the availability of heavy metals to the plant and by increasing plant biomass. This review uses a meta-analysis of the results from 103 microbialaugmented phytoextraction studies to examine if one of these microbial mechanisms has a greater potential to positively impact phytoextraction. Trends surrounding the use of heavy metal-accumulating versus non-heavy-metal-accumulating plants in phytoextraction are discussed. Microbially induced improvements in the accumulation of heavy metals in plant biomass, a focus of several studies, are always coincident with enhanced net phytoextraction. However, microbial treatments that improved plant biomass are more prevalent in the literature and account for a larger number of studies that reported improved phytoextraction, particularly in non-heavy-metal-accumulating plants. The experimental findings emerging from the literature that implicate specific microbial processes in improving phytoextraction are briefly reviewed and used to underline trends observed from the meta-analysis that indicate future directions regarding the use of microorganisms to improve phytoextraction efficiency.

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“…Members of this phylum are known as plant polymer-degrading bacteria and were reported before from anaerobic cellulose-fed digesters and herbivore guts [356]. Even though no evidence has been shown for their (direct) involvement in reductive dechlorination of organohalide pollutants, they were detected before in contaminated sites like a hexahydro-1,3,5-trinitro-1.3.5-triazine (RDX) contaminted vadose zone [357,358] and soils contaminated with cadmium [359] and crude oil [360]. High relative abundance of sulfate-reducing Deltaproteobacteria, mainly from the Desulfobacteraceae family, with relative abundances ranging between 5 and 25.9% was detected in all TeCB-fed microcosms during 161 days of cultivation ( Figure 5.5a).…”

Section: Discussionmentioning

confidence: 99%

Ecophysiology and environmental distribution of organohalide-respiring bacteria

Lu¹

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Survival of introduced phosphate-solubilizing bacteria (PSB) and their impact on microbial community structure during the phytoextraction of Cd-contaminated soil

Cited by 62 publications

References 47 publications

Plant growth-promoting rhizobacteria enhance the growth and Cd uptake of Sedum plumbizincicola in a Cd-contaminated soil

Plant growth-promoting rhizobacteria enhance the growth and Cd uptake of Sedum plumbizincicola in a Cd-contaminated soil

Microbial associated plant growth and heavy metal accumulation to improve phytoextraction of contaminated soils

Ecophysiology and environmental distribution of organohalide-respiring bacteria

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