Heavy metal mediated phytotoxic impact on winter wheat: oxidative stress and microbial management of toxicity by<i>Bacillus subtilis</i>BM2

Rizvi, Asfa; Ahmed, Bilal; Zaidi, Almas; Khan, M. S.

doi:10.1039/c9ra00333a

Cited by 58 publications

(17 citation statements)

References 84 publications

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“…The decreased uptake of Cd in microbial inoculated plants under immobilizing agents might be due to the enhanced Cd immobilization in soil [13][14][15]47,73]. These results are substantiated by the findings of other researchers as well [74][75][76]. Enterobacter sp.…”

Section: Discussionsupporting

confidence: 77%

Enhancing Cadmium Tolerance and Pea Plant Health through Enterobacter sp. MN17 Inoculation Together with Biochar and Gravel Sand

Naveed

Mustafa

Majeed

et al. 2020

Plants

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Contamination of soils with heavy metals, particularly cadmium (Cd), is an increasingly alarming environmental issue around the world. Application of organic and inorganic immobilizing amendments such as biochar and gravel sand in combination with metal-tolerant microbes has the potential to minimize the bioavailability of Cd to plants. The present study was designed to identify the possible additive effects of the application of Enterobacter sp. MN17 as well as biochar and gravel sand on the reduction of Cd stress in plants and improvement of growth and nutritional quality of pea (Pisum sativum) plants through the reduction of Cd uptake. Pea seeds were surface sterilized then non-inoculated seeds and seeds inoculated with Enterobacter sp. MN17 were planted in artificially Cd-polluted soil, amended with the immobilizing agents biochar and gravel sand. Application of biochar and gravel sand alone and in combination not only improved the growth and nutritional quality of pea plants by in situ immobilization but also reduced the uptake of Cd by plant roots and its transport to shoots. However, microbial inoculation further enhanced the overall plant health as well as alleviated the toxic effects of Cd on the pea plants. These soil treatments also improved rates of photosynthesis and transpiration. The combined use of biochar and gravel sand with bacterial inoculation resulted in an increase in plant height (47%), shoot dry weight (42%), root dry weight (57%), and 100 seeds weight (49%) as compared to control plants in Cd contaminated soil. Likewise, biochemical constituents of pea seeds (protein, fat, fiber, and ash) were significantly increased up to 41%, 74%, 32%, and 72%, respectively, with the combined use of these immobilizing agents and bacterium. Overall, this study demonstrated that the combined application of biochar and gravel sand, particularly in combination with Enterobacter sp. MN17, could be an efficient strategy for the remediation of Cd contaminated soil. It could support better growth and nutritional quality of pea plants.

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Section: Discussionsupporting

confidence: 77%

Enhancing Cadmium Tolerance and Pea Plant Health through Enterobacter sp. MN17 Inoculation Together with Biochar and Gravel Sand

Naveed

Mustafa

Majeed

et al. 2020

Plants

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“…Figures 1 and 2 demonstrated that different communities, which also showed differences in the population number, thrived in the activated sludge as evidenced by the appearance of different colonies when cultured in Cu-containing media. The observation thus suggests that different genetic and physiological background may contribute to the growth of different microbial communities, as also suggested by Rizvi et al (2019) that differences in the number of microorganisms population may be attributed to differences in nutrients composition in the growth media, genetic background, and growth conditions.…”

Section: Isolation and Characterization Of Copper Resistant Bacteriamentioning

confidence: 62%

Indigenous copper resistant bacteria isolated from activated sludge of water treatment plant in Surabaya, Indonesia

2020

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Abstract. Irawati W, Pinontoan R, Yuwono T. 2020. Indigenous copper resistant bacteria isolated from activated sludge of water treatment plant in Surabaya, Indonesia. Biodiversitas 21: 5077-5084. Biological wastewater treatment using activated sludge is a promising wastewater treatment solution for removing heavy metals. To improve the effectiveness of biological wastewater treatment, activated sludge must consist of bacteria that can remove heavy metals through the process of bioaccumulation and biosorption. This study was aimed to isolate indigenous copper resistant bacteria and determining their resistance to copper, as well as analyzing their ability to accumulate and remove copper. Copper resistant bacteria were isolated from activated sludge of water treatment plant in industrial plant in Rungkut, Surabaya. Resistance to copper was analyzed by determining the value of minimum inhibitory concentration (MIC). The ability of bacterial isolates to remove copper was analyzed by atomic absorption spectrophotometer. A total of six highly copper resistant bacteria were isolated and designated as B6.1, C8.1, C9.3, C9.4, C9.5, C10.4 isolates. All isolates were categorized as high resistant bacteria with the MICs of 9-11 mM CuSO4. The two highest copper resistant bacteria were isolates C10.4 and C9.4. The ability of the two isolates to accumulate copper was 8.02 mg and 4.83 mg per gram dry weight of cells and to remove of copper up to 20.45% and 17.66%, respectively.

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“…Phytostabilization (the conversion of chemicals to less mobile and active forms) can employ plants with high resistance to HM, localizing HM mainly in the root system (Chaney & Mahoney, 2014). Phytoremediation, an emerging technique makes use of plants and their associated microbes to clean up heavy Rizvi et al (2019) Notes.…”

Section: Bioremediationmentioning

confidence: 99%

Nickel stress-tolerance in plant-bacterial associations

Pishchik

Mirskaya

Chizhevskaya

et al. 2021

PeerJ

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Nickel (Ni) is an essential element for plant growth and is a constituent of several metalloenzymes, such as urease, Ni-Fe hydrogenase, Ni-superoxide dismutase. However, in high concentrations, Ni is toxic and hazardous to plants, humans and animals. High levels of Ni inhibit plant germination, reduce chlorophyll content, and cause osmotic imbalance and oxidative stress. Sustainable plant-bacterial native associations are formed under Ni-stress, such as Ni hyperaccumulator plants and rhizobacteria showed tolerance to high levels of Ni. Both partners (plants and bacteria) are capable to reduce the Ni toxicity and developed different mechanisms and strategies which they manifest in plant-bacterial associations. In addition to physical barriers, such as plants cell walls, thick cuticles and trichomes, which reduce the elevated levels of Ni entrance, plants are mitigating the Ni toxicity using their own antioxidant defense mechanisms including enzymes and other antioxidants. Bacteria in its turn effectively protect plants from Ni stress and can be used in phytoremediation. PGPR (plant growth promotion rhizobacteria) possess various mechanisms of biological protection of plants at both whole population and single cell levels. In this review, we highlighted the current understanding of the bacterial induced protective mechanisms in plant-bacterial associations under Ni stress.

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Heavy metal mediated phytotoxic impact on winter wheat: oxidative stress and microbial management of toxicity byBacillus subtilisBM2

Abstract: The bacterial management of heavy metal toxicity to durum wheat under a metal stressed environment was demonstrated.

Cited by 58 publications

References 84 publications

Enhancing Cadmium Tolerance and Pea Plant Health through Enterobacter sp. MN17 Inoculation Together with Biochar and Gravel Sand

Enhancing Cadmium Tolerance and Pea Plant Health through Enterobacter sp. MN17 Inoculation Together with Biochar and Gravel Sand

Indigenous copper resistant bacteria isolated from activated sludge of water treatment plant in Surabaya, Indonesia

Nickel stress-tolerance in plant-bacterial associations

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