The effect of plant growth-promoting rhizobacteria on the growth, physiology, and Cd uptake of<i>Arundo donax</i>L.

Sarathambal, C.; Khankhane, P.J.; Gharde, Yogita; Kumar, Bhumesh; Varun, Mayank; Arun, S.

doi:10.1080/15226514.2016.1225289

Cited by 48 publications

(17 citation statements)

References 77 publications

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“…The essential elements of this study are Mg and and Zn (micronutrients) which possess higher BCF value for both roots and shoots and in TrF. This is due to the ability of plants to uptake essential elements compared to non-essential elements also plants may develop tolerance strategies that reduce their uptake and accumulation (Saha et al, 2015;Sarathambal et al, 2017;Sung, Lee and Munster, 2015). Plants which are possessing < 1 for TF and BCF values are considered to be unsuitable for phytoextraction process (Romanova, Shuvaeva and Belchenko, 2016;Romero-Hernández et al, 2017).…”

Section: Resultsmentioning

confidence: 98%

Phytoremediation potential of Bacopa monnieri in the removal of heavy metals

Dineshkumar¹,

Sivalingam²,

Thirumarimurugan³

2019

JEB

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The present study aimed to investigate the bioaccumulation of heavy metals from the effluent of battery industry by an aquatic plant, Bacopa monnieri. Experiment was carried for 25 days and heavy metal concentrations were analyzed in plant parts (roots and shoots), soil and effluent using atomic absorption spectroscopy (AAS) for 5 days each. Parameters such as Translocation Factor (TF), Bioconcentration Factor (BCF) and Transposition Factor (TrF) were calculated to analyze heavy metal interaction between plant, soil and effluents. Zn and Mg were found to be high in TF, BCF and TrF, but Cr had a TF value higher than Zn as it translocates high amount of ions to plant parts. TrF values of contaminants increased constantly in the following order: Mg > Zn > Cd > Pb > Cr. TF and BCF values were not > 1 for toxic metals (Pb, Cr and Cd). B. Monnieri can be used as a phytoextractor in removing contaminants from aquatic bodies.

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Section: Resultsmentioning

confidence: 98%

Phytoremediation potential of Bacopa monnieri in the removal of heavy metals

Dineshkumar¹,

Sivalingam²,

Thirumarimurugan³

2019

JEB

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“…AM fungi are microorganisms with very important and valuable functions in the ecosystem. Their potential for Arundo donax is studied and focused on enhancement of phytoremediation capabilities using arbuscular mycorrhiza [58], increase in photosynthesis and plant biomass accumulation [59], improvement of plant performance and productivity [60], or the acclimatization and establishment of Arundo donax plantlets [61,62]. However, the impact of sewage sludge on the AM fungal communities in the Arundo donax rhizosphere was not investigated yet.…”

Section: Discussionmentioning

confidence: 99%

Responses of Rhizosphere Fungal Communities to the Sewage Sludge Application into the Soil

et al. 2019

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Due to the increasing sewage sludge production in the world and problems with its disposal, an application of sludge to the soil appears to be a suitable solution considering its fertilizer properties and ability to improve the soil physical conditions. On the other hand, the sludge may also contain undesirable and toxic substances. Since soil microorganisms are sensitive to environmental changes, they can be used as indicators of soil quality. In this study, we used sewage sludge (SS) from two municipal wastewater treatment plants (SS-A and SS-B) in the dose of 5 t/ha and 15 t/ha in order to determine possible changes in the fungal community diversity, especially arbuscular mycorrhizal fungi (AMF), in the rhizosphere of Arundo donax L. Rhizosphere samples were collected in summer and autumn for two consecutive years and the fungal diversity was examined using terminal restriction fragment length polymorphism and 18S rDNA sequencing. Fungal alpha diversity was more affected by SS-A than SS-B probably due to the higher heavy metal content. However, based on principal component analysis and ANOSIM, significant changes in overall fungal diversity were not observed. Simultaneously, 18S rDNA sequencing showed that more various fungal taxa were detected in the sample with sewage sludge than in the control. Glomus sp. as a representative of AMF was the most represented. Moreover, Funneliformis in both samples and Rhizophagus in control with Septoglomus in the sludge sample were other representatives of AMF. Our results indicate that the short-term sewage sludge application into the soil does not cause a shift in the fungal community composition.

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“…In addition, nutrient deficiency was also reported in metal contaminated soils which often causes stress for plants (Qishlaqi and Moore, 2007; Ladwani et al, 2012). Till now, several PGP rhizobacteria have been identified such as Azotobacter, Bacillus, Pseudomonas, Azospirillum , and Serratia for their potential to enhance plant growth by solubilizing minerals, producing iron chelating compounds (siderophores), phytohormones and biocontrol compounds and enhancing phytoremediation of metal contaminants (Hansda et al, 2014; Ndeddy Aka and Babalola, 2016; Sarathambal et al, 2017). Chromium [Cr(VI)] exerts toxic effect on microorganisms by different mechanisms.…”

Section: Discussionmentioning

confidence: 99%

“…The PGP activities of microorganisms are one of the reasons behind the survival of microorganism in metal contaminated soils. The siderophore producing microorganisms have the potential to bind with metals present in surrounding and therefore enhance the bioavailability of metals in plant rhizosphere (Sarathambal et al, 2017). In general, the phytoremediation process of contaminated soils will enhance with the increase in plant growth and metal bioavailability (Ahemad, 2015).…”

Section: Discussionmentioning

confidence: 99%

Tolerance and Reduction of Chromium(VI) by Bacillus sp. MNU16 Isolated from Contaminated Coal Mining Soil

et al. 2017

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The bacterium MNU16 was isolated from contaminated soils of coal mine and subsequently screened for different plant growth promoting (PGP) activities. The isolate was further identified by 16S rRNA sequencing as Bacillus subtilis MNU16 with IAA concentration (56.95 ± 0.43 6μg/ml), siderophore unit (9.73 ± 2.05%), phosphate solubilization (285.13 ± 1.05 μg/ml) and ACC deaminase activity (116.79 ± 0.019 μmoles α-ketobutyrate/mg/24 h). Further, to evaluate the metal resistance profile of bacterium, the isolate was screened for multi-metal resistance (viz. 900 mg/L for Cr, 600 mg/L for As, 700 mg/L for Ni and 300 mg/L for Hg). Additionally, the resistance pattern of B. subtilis MNU16 against Cr(VI) (from 50 to 300 mg/L) treatments were evaluated. An enriched population was observed at 0–200 mg/L Cr(VI) concentration while slight reductions were observed at 250 and 300 mg/L Cr(VI). Further, the chromium reduction ability at 50 mg/L of Cr(VI) highlighted that the bacterium B. subtilis MNU16 reduced 75% of Cr(VI) to 13.23 mg/L within 72 h. The localization of electron dense precipitates was observed in the TEM images of B. subtilis MNU16 which is might be due to the reduction of Cr(VI) to Cr(III). The data of fluorescence microscopy and flow cytometry with respect to Cr(VI) treatments (50–300 mg/L) showed a similar pattern and clearly revealed the less toxic effect of hexavalent chromium upto 200 mg/L Cr(VI) concentration. However, toxicity effects were more pronounced at 300 mg/L Cr(VI). Therefore, the present study suggests that the plant growth promoting potential and resistance efficacy of B. subtilis MNU16 will go a long way in developing an effective bioremediation approach for Cr(VI) contaminated soils.

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The effect of plant growth-promoting rhizobacteria on the growth, physiology, and Cd uptake ofArundo donaxL.

Cited by 48 publications

References 77 publications

Phytoremediation potential of Bacopa monnieri in the removal of heavy metals

Phytoremediation potential of Bacopa monnieri in the removal of heavy metals

Responses of Rhizosphere Fungal Communities to the Sewage Sludge Application into the Soil

Tolerance and Reduction of Chromium(VI) by Bacillus sp. MNU16 Isolated from Contaminated Coal Mining Soil

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