Mercury induced oxidative stress, DNA damage, and activation of antioxidative system and Hsp70 induction in duckweed (Lemna minor)

Ecotoxicology and Environmental Safety
Tingting ZhangQinsong Xu

Abstract

Mercury uptake and its effects on physiology, biochemistry and genomic stability were investigated in Lemna minor after 2 and 6d of exposure to 0-30μM Hg. The accumulation of Hg increased in a concentration- and duration-dependent manner, and was positively correlated with the leaf damage. Oxidative stress after Hg exposure was evidenced in L. minor by a significant decrease in photosynthetic pigments, an increase in malondialdehyde and lipoxygenase activities (total enzyme activity and isoenzymes activity). Fronds of L. minor exposed to Hg showed an induction of peroxidase, catalase, and ascorbate peroxidase activities (total enzyme activity and some isoenzymes activities). Exposure of L. minor to Hg reduced the activity (total enzyme activity and some isoenzymes activities) of glutathione reductase, and superoxide dismutase. Exposure to Hg produced a transient increase in the content of glutathione and ascorbic acid. The content of dehydroascorbate and oxidized glutathione in L. minor were high during the entire exposure period. Exposure of L. minor to Hg also caused the accumulation of proline and soluble sugars. The amplification of new bands and the absence of normal DNA amplicons in treated plants in the random amplified ...Continue Reading

Citations

Oct 27, 2018·Environmental Science and Pollution Research International·Sonali DubeyVibha Rani
Nov 7, 2018·Environmental Science and Pollution Research International·Paul ZieglerKlaus-Jürgen Appenroth
Oct 29, 2020·Environmental Science and Pollution Research International·Francielle Roberta Dias de LimaJoão José Marques
Jun 26, 2021·Environmental Science and Pollution Research International·Lulu ChaiZhonghua Wu
Jul 5, 2021·Environmental Science and Pollution Research International·Emine YalçınKültiğin Çavuşoğlu
Jun 9, 2021·Journal of Microbiology and Biotechnology·Chalermwoot SomparkNiramol Sakkayawong

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