Melatonin mitigates cadmium phytotoxicity through modulation of phytochelatins biosynthesis, vacuolar sequestration, and antioxidant potential in Solanum lycopersicum L

Frontiers in Plant Science
Md Kamrul HasanJie Zhou

Abstract

Melatonin is a ubiquitous signal molecule, playing crucial roles in plant growth and stress tolerance. Recently, toxic metal cadmium (Cd) has been reported to regulate melatonin content in rice; however, the function of melatonin under Cd stress, particularly in higher plants, still remains elusive. Here, we show that optimal dose of melatonin could effectively ameliorate Cd-induced phytotoxicity in tomato. The contents of Cd and melatonin were gradually increased over time under Cd stress. However, such increase in endogenous melatonin was incapable to reverse detrimental effects of Cd. Meanwhile, supplementation with melatonin conferred Cd tolerance as evident by plant biomass and photosynthesis. In addition to notable increase in antioxidant enzymes activity, melatonin-induced Cd stress mitigation was closely associated with enhanced H(+)-ATPase activity and the contents of glutathione and phytochelatins. Although exogenous melatonin had no effect on root Cd content, it significantly reduced leaf Cd content, indicating its role in Cd transport. Analysis of Cd in different subcellular compartments revealed that melatonin increased cell wall and vacuolar fractions of Cd. Our results suggest that melatonin-induced enhancements ...Continue Reading

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Citations

Mar 1, 2016·Frontiers in Plant Science·Rüdiger Hardeland
Jun 7, 2016·Journal of Pineal Research·Meng-Qi LiJie Zhou
Jan 18, 2017·Journal of Pineal Research·Shu-Yu CaiJie Zhou
Nov 17, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Weicheng LiuHongjian Wan
Jan 19, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xin LiWen-Yan Han
Feb 15, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Zhen-Yu QiJie Zhou
Feb 15, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Biswojit DebnathDongliang Qiu
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Dec 28, 2017·Journal of Experimental Botany·Yanping WangZhulong Chan
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Sep 27, 2018·Journal of Pineal Research·Mukesh Kumar KanwarJie Zhou
Sep 21, 2017·Frontiers in Plant Science·Md Kamrul HasanZhen-Yu Qi
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Apr 27, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xin PangHongjian Wan
Aug 1, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yang YuZhiwei Zhao

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Methods Mentioned

BETA
chromosomal aberrations
Fluorescence
MDA
Assay
PCR

Software Mentioned

Data Processing System ( DPS )

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