Phytoextraction competence of J. curcas L. on ore waste dump of the bauxite mine under the influence of multi potential Bacillus cereus

Narayanan, Mathiyazhagan; Kandasamy, Gajendiran; He, Zhixia; Kandasamy, Sabariswaran; Alfarhan, Ahmed; Pugazhendhi, Arivalagan

doi:10.1016/j.eti.2020.101221

Cited by 20 publications

(13 citation statements)

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“…Mushtaq et al [ 22 ] reported that inoculation of B. cereus enhanced the uptake of Cr, Cd, and Cu in Catharanthus roseus (L.) G. Don. The research work of Narayanan et al [ 23 ] showed that B. cereus mobilizes heavy metals like Cd, Zn, Mn, and Pb and enhanced their uptake and accumulation in Jatropha curcas L. Ke et al [ 24 ] also reported that application of Bacillus spp. increased the phytoextraction efficiency of Lolium perenne L. in Cu contaminated soil.…”

Section: Introductionmentioning

confidence: 99%

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

et al. 2021

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Plant growth-promoting rhizobacteria (PGPR) mediate heavy metal tolerance and improve phytoextraction potential in plants. The present research was conducted to find the potential of bacterial strains in improving the growth and phytoextraction abilities of Brassica nigra (L.) K. Koch. in chromium contaminated soil. In this study, a total of 15 bacterial strains were isolated from heavy metal polluted soil and were screened for their heavy metal tolerance and plant growth promotion potential. The most efficient strain was identified by 16S rRNA gene sequencing and was identified as Bacillus cereus. The isolate also showed the potential to solubilize phosphate and synthesize siderophore, phytohormones (indole acetic acid, cytokinin, and abscisic acid), and osmolyte (proline and sugar) in chromium (Cr+3) supplemented medium. The results of the present study showed that chromium stress has negative effects on seed germination and plant growth in B. nigra while inoculation of B. cereus improved plant growth and reduced chromium toxicity. The increase in seed germination percentage, shoot length, and root length was 28.07%, 35.86%, 19.11% while the fresh and dry biomass of the plant increased by 48.00% and 62.16%, respectively, as compared to the uninoculated/control plants. The photosynthetic pigments were also improved by bacterial inoculation as compared to untreated stress-exposed plants, i.e., increase in chlorophyll a, chlorophyll b, chlorophyll a + b, and carotenoid was d 25.94%, 10.65%, 20.35%, and 44.30%, respectively. Bacterial inoculation also resulted in osmotic adjustment (proline 8.76% and sugar 28.71%) and maintained the membrane stability (51.39%) which was also indicated by reduced malondialdehyde content (59.53% decrease). The antioxidant enzyme activities were also improved to 35.90% (superoxide dismutase), 59.61% (peroxide), and 33.33% (catalase) in inoculated stress-exposed plants as compared to the control plants. B. cereus inoculation also improved the uptake, bioaccumulation, and translocation of Cr in the plant. Data showed that B. cereus also increased Cr content in the root (2.71-fold) and shoot (4.01-fold), its bioaccumulation (2.71-fold in root and 4.03-fold in the shoot) and translocation (40%) was also high in B. nigra. The data revealed that B. cereus is a multifarious PGPR that efficiently tolerates heavy metal ions (Cr+3) and it can be used to enhance the growth and phytoextraction potential of B. nigra in heavy metal contaminated soil.

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Section: Introductionmentioning

confidence: 99%

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

et al. 2021

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“…The graph was plotted, and the quantity of IAA synthesis at various dosages of tryptophan was measured and correlated with cell growth. The P-solubilizing potential of B. cereus NDRMN001 was analyzed as per the methodology of Narayanan et al with required changes (Narayanan et al, 2020b). In brief, about 0.1 ml of B. cereus NDRMN001 was added into 100 ml of freshly prepared Pikovskaya's medium supplemented with 0.5 g of tricalcium phosphate in individual flasks and cultured for 2 weeks at 30°with 120 rpm in a shaker incubator and a separate control was maintained.…”

Section: Brief Profile Of Test Bacteriummentioning

confidence: 99%

“…Based on the results attained from the optimization study, the PGP traits (production of IAA, HCN, and siderophore, N 2fixing potential, and P solubilization) of B. cereus NDRMN001 were studied at 30°, pH 6.5, 6% of glucose, 9% of tryptophan, and 1.5% of tricalcium phosphate (Narayanan et al, 2020b).…”

Section: Optimization Of Growth Parametersmentioning

confidence: 99%

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Assessment of PGP traits of Bacillus cereus NDRMN001 and its influence on Cajanus cajan (L.) Millsp. phytoremediation potential on metal-polluted soil under controlled conditions

Narayanan

2022

Front. Plant Sci.

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The current study looked at the plant growth-promoting (PGP) traits of the pre-isolated and metal-tolerant Bacillus cereus NDRMN001 as well as their stimulatory effect on the physiology, biomolecule content, and phytoremediation potential of Cajanus cajan (L.) Millsp. on metal-polluted soil. The bauxite mine, which is surrounded by farmland (1 km away), has been severely polluted by metals such as Cd (31.24 ± 1.68), Zn (769.57 ± 3.46), Pb (326.85 ± 3.43), Mn (2519.6 ± 5.71), and Cr (302.34 ± 1.62 mg kg−1) that exceeded Indian standards. The metal-tolerant B. cereus NDRMN001 had excellent PGP activities such as synthesis of hydrogen cyanide (HCN), siderophore, indole acetic acid (IAA), N2 fixation, and P solubilization. Furthermore, the optimal growth conditions (temperature of 30°C, pH 6.5, 6% glucose, 9% tryptophan, and 1.5% tricalcium phosphate) for effective synthesis and expression of PGP traits in B. cereus NDRMN001 were determined. Such metal-tolerant B. cereus NDRMN001 traits can significantly reduce metals in polluted soil, and their PGP traits significantly improve plant growth in polluted soil. Hence, this strain (B. cereus NDRMN001) significantly improved the growth and phytoremediation potential of C. cajan (L.) Millsp on metal-polluted soil without [study I: 2 kg of sieved and autoclaved metal-polluted soil seeded with bacterium-free C. cajan (L.) Millsp. seeds] and with [study II: 2 kg of sieved and autoclaved metal-polluted soil seeded with B. cereus NDRMN001-coated C. cajan (L.) Millsp. seeds] B. cereus NDRMN001 amalgamation. Fertile soil was used as control. The physiological parameters, biomolecule contents, and the phytoremediation (Cr: 7.74, Cd: 12.15, Zn: 16.72, Pb: 11.47, and Mn: 14.52 mg g−1) potential of C. cajan (L.) Millsp. were significantly effective in study II due to the metal-solubilizing and PGP traits of B. cereus NDRMN001. These results conclude that the test bacteria B. cereus NDRMN001 considerably improved the phytoremediation competence of C. cajan (L.) Millsp. on metal-polluted soil in a greenhouse study.

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“…A high sensitive digital conductivity (LABMAN LMCM-20, Mumbai, India) meter was utilized in this study to evaluate the conductivity nature of the test water sample [32]. The known conductivity standard solution was used to calibrate the conductivity probe.…”

Section: Conductivity Analysismentioning

confidence: 99%

Impacts of Heavy Metal Enriched Tailings of Magnesite Mine on Surrounding Water Reservoirs

Kandasamy¹,

Singh²,

Narayanan³

2021

J. Environ. Treat. Tech.

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The prime aim of this study was to assess the physicochemical properties of water reservoirs from magnesite mine surrounding four sites (each direction) on three seasons such as summer, winter, and rainy season. The results attained from the physicochemical analysis states that all the surrounding water reservoir samples have been severely polluted by both essential and non-essential elements. Predominantly the water sample taken from the site I of three seasons has been severely affected by the metal pollutants. The site I water sample unacceptable (mg L-1) physicochemical properties such as turbidity (16.20±1.3; 15.23±1.8; 18.29±1.5), conductivity (2742.30±2.7; 2652.24±2.1; 2785.25±2.1), TDS (2085.13±4.3; 2024.15±2.1; 2113.10±1.2), TSS (712.21±2.1; 692.31±1.12; 711.12±1.5), hardness (765.38±2.4; 738.65±2.1; 781.23±2.9), BOD (208.12±1.7; 201.31±1.2; 212.31±1.5), COD (312.74±0.98; 301.54±1.21; 307.721±1.51), DO (1.12±.39; 1.01±.28; 1.02±0.23), Ca (265.28±1.21; 252.14±1.34; 275.34±1.17), Mg (124.56±1.54; 117.32±1.28; 135.28±1.62), Cl (1248.64±2.69; 1203.17±2.18; 1351.21±1.34), Zn (75.61±1.85; 71.52±1.02; 78.32±1.21), Cd (24.54±0.84; 21.28±0.61; 26.25±0.71), Pb (11.52±0.95; 8.2±0.52; 12.35±0.52), and Cr (3.1±0.054; 2.9±0.063; 3.5±0.21) contents of summer, winter, and the rainy season correspondingly. Among these three seasons, the water sample collected during rainy season possesses more quantity metals than other seasons. These results confirmed that the metal contamination has been spreading from the abandoned magnesite mine tailing. These unacceptable physicochemical properties could cause severe ecological damage to the water ecosystem.

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Phytoextraction competence of J. curcas L. on ore waste dump of the bauxite mine under the influence of multi potential Bacillus cereus

Cited by 20 publications

References 26 publications

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

Assessment of PGP traits of Bacillus cereus NDRMN001 and its influence on Cajanus cajan (L.) Millsp. phytoremediation potential on metal-polluted soil under controlled conditions

Impacts of Heavy Metal Enriched Tailings of Magnesite Mine on Surrounding Water Reservoirs

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