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The Response of Duckweed (Lemna minor L.) Roots to Cd and Its Chemical Forms

Authors :
Yan Xue
Jin-qin Wang
Jin Huang
Feng-ying Li
Ming Wang
Source :
Journal of Chemistry, Vol 2018 (2018)
Publication Year :
2018
Publisher :
Wiley, 2018.

Abstract

The response of duckweed (Lemna minor L.) roots to Cd and its chemical forms was investigated. The relative root growth rate and concentrations of Cd and its different chemical forms in the root, that is, ethanol-extractable (FE-Cd), HCl-extractable (FHCl-Cd), and residual fractions (Fr-Cd), were quantified. Weibull model was used to unravel the regression between the relative root elongation (RRL) with chemical forms of Cd. Parameters assessed catalase (CAT), peroxidases (POD), and superoxide dismutase (SOD), as well as malondialdehyde (MDA) and total antioxidant capacity (A-TOC). Our results show that both the relative root growth rate and relative frond number were affected by Cd concentrations. The chemical forms of Cd were influenced by Cd content in the medium. Relative root elongation (RRL) showed a significant correlation with chemical forms of Cd. Additionally, POD and SOD increased at lower Cd concentrations followed by a decrease at higher Cd concentrations (at more than 5 μM Cd). Moreover, MDA and A-TOC increased and CAT decreased with increasing Cd exposure. Furthermore, CAT showed a significant correlation with FHCl-Cd. Taken together, it can be concluded that the chemical forms of Cd are statistically significant predictors of Cd toxicity to duckweed and to the other similar aquatic plants.

Subjects

Subjects :
Chemistry
QD1-999

Details

Language :
English
ISSN :
20909063 and 20909071
Volume :
2018
Database :
Directory of Open Access Journals
Journal :
Journal of Chemistry
Publication Type :
Academic Journal
Accession number :
edsdoj.b4f10f8bd9db4fee8335cb75c62a220d
Document Type :
article
Full Text :
https://doi.org/10.1155/2018/7274020