Abstract:
:Cadmium (Cd) contamination is one of the most serious global environmental problems, and phytoremediation, which uses Cd-accumulator plants, is potentially one of the sustainable solutions. Pot experiments with natural and Cd-amended soils were conducted to investigate the accumulation of heavy metals in 10 leading cultivars of tobacco in China. The extraction ability and profiles of Cd accumulation among plant organs were also analyzed. The tobacco roots accumulated cobalt, nickel, and Cd, while the leaf highly bioaccumulated Cd and lowly accumulated zinc, selenium and mercury. The transport from the tobacco stem to the leaf plays a critical role in the accumulation of these elements. The ratios of Cd concentration in the leaves at lower, middle and upper positions were comparatively stable. The high Cd-extracting cultivars were "Hongda", "NC89" and "Zhongyan 100" when grown in normal soils, "CuiBi 1" and "Hongda" in moderately contaminated soils, and "YuYan 87", "LongJiang 851" and "K326" in severely contaminated soils. Tobacco leaves could accumulate about 80% of the total Cd extracted from the soil by the plant. Considering the Cd-extraction limitations exhibited by leading tobacco cultivars, screening of germplasm resources for high or low levels of Cd-accumulation is still an important target for the future.
journal_name
Int J Phytoremediationjournal_title
International journal of phytoremediationauthors
Liu H,Wang H,Zhang Y,Wang H,Yang J,Liu J,Shi Ydoi
10.1080/15226514.2018.1556589subject
Has Abstractpub_date
2019-01-01 00:00:00pages
699-706issue
7eissn
1522-6514issn
1549-7879journal_volume
21pub_type
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