Phytoremediation of mine tailings by Brassica juncea inoculated with plant growth-promoting bacteria

Mendoza-Hernández, José Carlos; Vázquez-Delgado, Osmar Rodrigo; Castillo-Morales, Maribel; Varela-Caselis, Jenaro Leocadio; Santamaría-Juárez, Juana Deisy; Olivares‐Xometl, Octavio; Arriola-Morales, Janette; Pérez-Osorio, Gabriela

doi:10.1016/j.micres.2019.126308

Cited by 29 publications

(12 citation statements)

References 24 publications

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“…PGPR used in phytoextraction experiments are usually isolated from the rizosphere of plants growing in polluted soils [97][98][99][100][101] and are thus adapted to high concentrations of metals, while PGPE used for enhancing phytoextraction are usually isolated from hyperaccumulator plants or other plants growing in polluted soils [102,103]. Recent examples of PGPR/PGPE applications in phytoremediation with Brassica species are presented in Table 1.…”

Section: The Use Of Pgprmentioning

confidence: 99%

“…and grown in soil contaminated with Cd, Zn, Pb, and Cu, showed an increased uptake of only Cd and Zn. Mendoza-Hernández et al [97] used different PGPR isolated from the rizosphere of plants grown in heavily contaminated mine tailing for inoculation of B. juncea plants and grown in multielement contaminated mine tailings. Inoculation with Serratia K120 resulted in the highest concentrations of Al, Fe, Pb, Cd, Cu, Cr, Mn, and As in roots, and additionally favored the transfer of all elements to the plant aerial part in comparison to other used strains, while inoculation with Enterobacter MC156 promoted phytostabilization of selected elements in plant roots.…”

Section: The Use Of Pgprmentioning

confidence: 99%

“…This is especially important when oil crops are grown, as the oil produced from the seeds can be used for biofuel production [152,156,160]. However, in most of the pot experiments the growth period of Brassica plants was 60 days or shorter, which is not enough for plants to reach maturity [30,76,[97][98][99]101,103,104,112,113,115,120,[123][124][125]. Another factor influencing biomass yield is plant density.…”

Section: The Challenges Of Moving From Pot To Field Experimentsmentioning

confidence: 99%

“…PGPR suitable for enhancing phytoextraction have to be tolerant to high metal concentrations, are usually very specific, and often must be isolated from the rizosphere of plants already growing in a polluted site [97,98,101,162]. Producing higher quantities of inocula suitable for field application is a challenge.…”

Section: The Challenges Of Moving From Pot To Field Experimentsmentioning

confidence: 99%

“…So far, the most promising results have been obtained with PGPR application, which increased metals uptake by up to 60% with no reduction of biomass [97][98][99][102][103][104][105]. Further research should therefore be directed towards conducting field tests that can provide valuable information about complex plant-microbe-metal interactions under natural conditions, which presents the next step towards the practical application and commercialization of PGPR products.…”

Section: The Challenges Of Moving From Pot To Field Experimentsmentioning

confidence: 99%

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Brassica Species in Phytoextractions: Real Potentials and Challenges

Zeremski

Ranđelović

Jakovljević

et al. 2021

Plants

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The genus Brassica is recognized for including species with phytoaccumulation potential and a large amount of research has been carried out in this area under a variety of conditions, from laboratory experiments to field trials, with spiked or naturally contaminated soils, using one- or multi-element contaminated soil, generating various and sometimes contradictory results with limited practical applications. To date, the actual field potential of Brassica species and the feasibility of a complete phytoextraction process have not been fully evaluated. Therefore, the aim of this study was to summarize the results of the experiments that have been performed with a view to analyzing real potentials and limitations. The reduced biomass and low metal mobility in the soil have been addressed by the development of chemically or biologically assisted phytoremediation technologies, the use of soil amendments, and the application of crop management strategies. Certain issues, such as the fate of harvested biomass or the performance of species in multi-metal-contaminated soils, remain to be solved by future research. Potential improvements to current experimental settings include testing species grown to full maturity, using a greater amount of soil in experiments, conducting more trials under real field conditions, developing improved crop management systems, and optimizing solutions for harvested biomass disposal.

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