Enhancement of toxic Cr (VI), Fe, and other heavy metals phytoremediation by the synergistic combination of native <i>Bacillus cereus</i> strain and <i>Vetiveria zizanioides</i> L

Nayak, Arunima; Panda, Sudhansu Sekhar; Basu, Aradhana; Dhal, Nabin Kumar

doi:10.1080/15226514.2017.1413332

Cited by 115 publications

(27 citation statements)

References 47 publications

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“…Nayak et al [115] showed that the hyper-accumulating capability of Vetiveria zizanoides could be enhanced by inoculating the native V. zizanioides with Bacillus cereus T1B3 strain. Similarly, Colocasia esculenta showed effective removal of Cr(VI) in water from wetlands due to the high accumulation of Cr(VI) in the roots part compared to the other parts [116].…”

Section: Phytoremediation By Hyperaccumulating Plantsmentioning

confidence: 99%

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

et al. 2021

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Extensive industrial activities resulted in an increase in chromium (Cr) contamination in the environment. The toxicity of Cr severely affects plant growth and development. Cr is also recognized as a human carcinogen that enters the human body via inhalation or by consuming Cr-contaminated food products. Taking consideration of Cr enrichment in the environment and its toxic effects, US Environmental Protection Agency and Agency for Toxic Substances and Disease Registry listed Cr as a priority pollutant. In nature, Cr exists in various valence states, including Cr(III) and Cr(VI). Cr(VI) is the most toxic and persistent form in soil. Plants uptake Cr through various transporters such as phosphate and sulfate transporters. Cr exerts its effect by generating reactive oxygen species (ROS) and hampering various metabolic and physiological pathways. Studies on genetic and transcriptional regulation of plants have shown the various detoxification genes get up-regulated and confer tolerance in plants under Cr stress. In recent years, the ability of the plant to withstand Cr toxicity by accumulating Cr inside the plant has been recognized as one of the promising bioremediation methods for the Cr contaminated region. This review summarized the Cr occurrence and toxicity in plants, role of detoxification genes in Cr stress response, and various plants utilized for phytoremediation in Cr-contaminated regions.

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Section: Phytoremediation By Hyperaccumulating Plantsmentioning

confidence: 99%

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

et al. 2021

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“…Induced production of phosphate and Siderophores which helps in the phytoremediation of Cd [329] 12.…”

Section: Host Plants Pgrb Species Specific Functions Referencesmentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

185

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Cadmium (Cd) is one of the most toxic metals in the environment, and has noxious effects on plant growth and production. Cd-accumulating plants showed reduced growth and productivity. Therefore, remediation of this non-essential and toxic pollutant is a prerequisite. Plant-based phytoremediation methodology is considered as one a secure, environmentally friendly, and cost-effective approach for toxic metal remediation. Phytoremediating plants transport and accumulate Cd inside their roots, shoots, leaves, and vacuoles. Phytoremediation of Cd-contaminated sites through hyperaccumulator plants proves a ground-breaking and profitable choice to combat the contaminants. Moreover, the efficiency of Cd phytoremediation and Cd bioavailability can be improved by using plant growth-promoting bacteria (PGPB). Emerging modern molecular technologies have augmented our insight into the metabolic processes involved in Cd tolerance in regular cultivated crops and hyperaccumulator plants. Plants’ development via genetic engineering tools, like enhanced metal uptake, metal transport, Cd accumulation, and the overall Cd tolerance, unlocks new directions for phytoremediation. In this review, we outline the physiological, biochemical, and molecular mechanisms involved in Cd phytoremediation. Further, a focus on the potential of omics and genetic engineering strategies has been documented for the efficient remediation of a Cd-contaminated environment.

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“…However, when the contact time is longer than 24 h, the influence of the Cr(VI) concentration becomes insignificant. The reasons may be as follows: (1) In the early stage, high concentration of Cr(VI) has a large negative effect on Bacillus cereus, such as oxidative stress, DNA and protein damage 37 ; (2) After a period of time, Bacillus cereus is resistant to Cr(VI) stress and restores activity. This also indicates that Bacillus cereus has good adaptability to high concentrations of Cr(VI).…”

Section: Resultsmentioning

confidence: 99%

Characterization of Microbial Communities, Identification of Cr(VI) Reducing Bacteria in Constructed Wetland and Cr(VI) Removal Ability of Bacillus cereus

Lin

You

Liu

2019

Sci Rep

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In this study, the contribution of substrates microorganisms in three different constructed wetlands (CWs) to Cr(VI) purification was discussed. In addition, the microbial communities in the substrate of different CWs were characterized, and rhizosphere Cr(VI) reducing bacteria was also identified. The results showed that microorganisms could improved Cr(VI) removal to 76.5%, and result in that more Cr(VI) was reduced to Cr(III). The dominant strains in the substrates of different CWs were Sphingomonas sp., Cystobacter sp., Acidobacteria bacterium , Sporotrichum and Pellicularia species . The Cr(VI) reducing bacteria from Leersia hexandra Swartz rhizosphere was identified as Bacillus cereus . Furthermore, under suitable conditions, the removal rate of Cr(VI) by Bacillus cereus was close to 100%.

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Enhancement of toxic Cr (VI), Fe, and other heavy metals phytoremediation by the synergistic combination of native Bacillus cereus strain and Vetiveria zizanioides L

Cited by 115 publications

References 47 publications

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Characterization of Microbial Communities, Identification of Cr(VI) Reducing Bacteria in Constructed Wetland and Cr(VI) Removal Ability of Bacillus cereus

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