Zn, Cd, S and trace metal bioaccumulation in willow (Salix spp.) cultivars grown hydroponically

Content Provider	Semantic Scholar
Author	Mcbride, Murray B. Martínez, Carmen Enid Kim, Burmshik
Copyright Year	2016
Abstract	ABSTRACT Willows (Salix spp.) can be used to phytoremediate soils contaminated by Zn and Cd under certain conditions. In this study, the ability of 14 Salix cultivars to concentrate Cd, Zn and S in leaves was measured in hydroponic culture with 10 and 200 µM Cd and Zn, respectively, in the nutrient medium. The cultivars showed a wide range of biomass yields, tolerance to metals, and foliar concentrations of Zn and Cd, with some cultivars accumulating up to 1000 mg kg−1 Zn, 70 mg kg−1 Cd and 10,000 mg kg−1 S with only mild phytotoxicity symptoms attributable to excess Zn. Cultivars with higher foliar Zn concentrations tended to have higher foliar Cd concentrations as well, and competition between Zn and Cd for uptake was observed. Exposure of Salix cultivars to Cd and Zn did not affect foliar concentrations of secondary metabolites such as polyphenols, but trace metal concentrations in leaves were significantly reduced (Fe and Cu) or increased (Mn) by exposure to excess Zn and Cd. Sulfur-XANES spectroscopy showed foliar S to be predominantly in highly oxidized (sulfate plus sulfonate) and reduced (thiol) forms, with oxidized S more prevalent in willows with the highest total S content.
Starting Page	1178
Ending Page	1186
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1080/15226514.2016.1189401
PubMed reference number	27216699
Journal	Medline
Volume Number	18
Alternate Webpage(s)	https://www.landsaga.com/uploads/1/2/7/6/127674913/zn_cd_s_and_trace_metal_bioaccumulation_in_willow.pdf
Journal	International journal of phytoremediation
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article