Mercury resistance and plant growth promoting traits of endophytic bacteria isolated from mercury-contaminated soil

Ustiatik, Reni; Nuraini, Yulia; Suharjono, Suharjono; Jeyakumar, Paramsothy; Anderson, Christopher; Handayanto, Eko

doi:10.1080/10889868.2021.1973950

Cited by 20 publications

(10 citation statements)

References 75 publications

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“…The tested bacteria were inoculated into Petri dishes containing NA medium using a pour plate method. The paper discs containing Pb were placed onto NA plates and then incubated at 28 °C for 48 h according to the method used by Ustiatik et al (2022) with modification. The tested bacteria's ability in Pb detoxification was measured according to the inhibition zone on the medium (Equation 1).…”

Section: Lead Minimum Inhibitory Concentration Bioassaymentioning

confidence: 99%

Lead (Pb)-Resistant Bacteria Improve <i>Brassica chinensis</i> Biomass and Reduce Pb Concentration in Pb-Contaminated Soil

Pertiwi,

Ustiatik,

Nuraini

2024

J.Tropical Biodiversity Biotechnology

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Applications of inorganic fertilisers and pesticides frequently increase lead (Pb) content in the soil and food crops. This study aims to isolate Pb-resistant bacteria and test the isolated bacteria in reducing Pb concentration and increasing biomass production of Brassica chinensis on Pb-contaminated soil. Soil and plant samples were collected from agricultural land in Batu City, East Java, Indonesia. The isolated bacteria were tested for Pb resistance and then characterised according to 16S rRNA Sequence. A pot trial with a completely randomised block design consisting of 9 treatments and 3 replications was set to determine the effect of Pb-resistant bacteria inoculation on Pb residue, plant growth, and soil nutrients. The result showed that the isolated Pb-resistant bacteria were Bacillus wiedmannii and Bacillus altitudinis. The bacteria were resistant to Pb up to 10,000 mg/L PbNO3. Inoculation of the bacteria increased B. chinensis growth and biomass production, namely increasing the number of leaves (12%) and dry weight (35%). Also, the bacteria reduced Pb residue in the soil by up to 88%. Moreover, soil essential nutrients such as total nitrogen, available phosphorus, and exchangeable potassium increased (12%, 73%, and 200%, respectively) after the application of Pb-resistant bacteria. The bacteria have the potential for bioremediation of Pb-contaminated soils on a large scale due to the bacteria prevent Pb uptake by food crops such as B. chinensis by reducing Pb content in the soil, which is good for food safety and environmental sustainability.

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Section: Lead Minimum Inhibitory Concentration Bioassaymentioning

confidence: 99%

Lead (Pb)-Resistant Bacteria Improve <i>Brassica chinensis</i> Biomass and Reduce Pb Concentration in Pb-Contaminated Soil

Pertiwi,

Ustiatik,

Nuraini

2024

J.Tropical Biodiversity Biotechnology

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“…The use of microbial bioremediation for the cleanup of mercury contaminated water was first demonstrated by Williams and Silver (1984), who assessed bacterial resistance and detoxification of heavy metals (Ustiatik et al, 2022). Since then, the application of this process has been made easier by the transgenic approach (Saravanan et al, 2022).…”

Section: Microbial Bioremediationmentioning

confidence: 99%

“…Microbial bioremediation is an effective alternative to traditional remediation processes because it is sustainable, eco-friendly, costeffective, reduces the chances of producing secondary pollutants and requires less energy than chemical methods (Hou et al, 2023). Moreover, it can be useful to the polluted area itself and has great potential for pollutant removal (Ustiatik et al, 2022). Table 1 lists microbes used in bioremediation of Hg.…”

Section: Microbial Bioremediationmentioning

confidence: 99%

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

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Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems and ecosystems and industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation is a nature‐based solution involving microbial‐ and plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria and how latest insights in our understanding of the cellular and biochemical mechanisms of the mer operon genes responsible for Hg resistance and transformation have facilitated developments in microbial Hg‐bioremediation. We also review the phytoremediation mechanisms, including those of bacterial‐ and fungi‐assisted phytoremediation processes, which have shown promising results in reducing Hg2+ to Hg0. This review provides a detailed knowledge of novel Hg bioremediation mechanisms and methods. Consequently, microbial‐ and phyto‐based bioremediation technologies have a critical role in the reclamation of Hg‐contaminated environments and the protection of human health and ecosystems.

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“…Under drought stress, plants enhance their ethylene production, which inhibits plant growth by affecting seed germination and root enlargement. Higher ACC levels are induced to combat severe drought stress ( Dikarev et al, 2016 ; Ustiatik et al, 2021 ).…”

Section: Molecular Mechanism Of Action Of Microbes In Plants Under Dr...mentioning

confidence: 99%

Research Progress in the Field of Microbial Mitigation of Drought Stress in Plants

et al. 2022

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Plants defend themselves against ecological stresses including drought. Therefore, they adopt various strategies to cope with stress, such as seepage and drought tolerance mechanisms, which allow plant development under drought conditions. There is evidence that microbes play a role in plant drought tolerance. In this study, we presented a review of the literature describing the initiation of drought tolerance mediated by plant inoculation with fungi, bacteria, viruses, and several bacterial elements, as well as the plant transduction pathways identified via archetypal functional or morphological annotations and contemporary “omics” technologies. Overall, microbial associations play a potential role in mediating plant protection responses to drought, which is an important factor for agricultural manufacturing systems that are affected by fluctuating climate.

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Mercury resistance and plant growth promoting traits of endophytic bacteria isolated from mercury-contaminated soil

Cited by 20 publications

References 75 publications

Lead (Pb)-Resistant Bacteria Improve <i>Brassica chinensis</i> Biomass and Reduce Pb Concentration in Pb-Contaminated Soil

Lead (Pb)-Resistant Bacteria Improve <i>Brassica chinensis</i> Biomass and Reduce Pb Concentration in Pb-Contaminated Soil

Bioremediation of mercury contaminated soil and water: A review

Research Progress in the Field of Microbial Mitigation of Drought Stress in Plants

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