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Preliminary Study on Cd Accumulation Characteristics in Prain

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Journal Plant Divers
Specialty Biology
Date 2020 Nov 2
PMID 33134618
Citations 4
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Abstract

Phytoremediation techniques to clean heavy metal pollution soil depend on identifying plant species that can act as phytoremediators. One important approach to screening potential phytoremediators is to evaluate characteristics of heavy metal accumulation. In this study, we performed firsthand analysis of Cd tolerance and accumulation characteristics of three cultivars by pot experiment. Plant growth results showed that all three cultivars can tolerate 50 mg kg soil Cd concentration. After growth under 50 mg kg soil Cd concentration for 4 months, the Cd bioconcentration factors in the shoots of 'Trifasciata', 'Laurentii', and 'Silver Hahnii' were 1.26, 1.30, and 1.19, while those in the roots were 12.53, 11.43, and 5.45, respectively. This result reveals the considerably low translocation factors of 0.10, 0.12, and 0.22 for 'Trifasciata', 'Laurentii', and 'Silver Hahnii', respectively. These results suggest that all three cultivars had high Cd absorption capacities but low Cd translocation capacities. In combination with total Cd accumulation distribution and plant growth characteristics, can be designed as a phytostabilizer in Cd-contaminated soils in its cultivation regions. Meanwhile, the mechanism of high Cd tolerance and accumulation characteristics in the roots of should be explored. This study provides new resources for dealing with Cd-contaminated soils and exploring Cd tolerance and accumulation mechanisms in plants.

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