Melatonin Mitigates Salt Stress in Wheat Seedlings by Modulating Polyamine Metabolism

Frontiers in Plant Science
Qingbo KeShiwen Wang

Abstract

Melatonin, a small molecular weight indoleamine molecule, is involved in various biological processes and responses to environmental cues in plants. However, its function in abiotic stress response and the underlying mechanisms is less clear. In this study, we investigated the effect of melatonin on wheat seedlings growth under salt stress condition. Exogenous melatonin pretreatment partially mitigated the salt-induced inhibition of whole-plant growth as judged from shoot dry weight, IAA content, leaf photosynthesis rate, maximum photochemistry efficiency of photosystem II, and chlorophyll. The mitigation was also observed in reduced accumulation of H2O2 in melatonin-pretreated wheat seedlings exposed to salt stress. Exogenous melatonin increased endogenous melatonin content by evaluating the levels of TaSNAT transcript, which encodes a key regulatory enzyme in the melatonin biosynthetic pathway. Furthermore, melatonin increased polyamine contents by accelerating the metabolic flow from the precursor amino acids arginine and methionine to polyamines; melatonin also decreased the degradation of salt-induced polyamines. Taken together, these results provide the evidence that melatonin mitigates salt stress mainly through its regu...Continue Reading

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Citations

Feb 10, 2019·International Journal of Molecular Sciences·Haoshuang ZhanWeining Song
Jul 18, 2020·Journal of Integrative Plant Biology·Chengliang SunXianyong Lin
May 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Mervat Shamoon Sadak, Bakry Ahmed Bakry
Oct 3, 2020·Ecotoxicology and Environmental Safety·Feiyu YanGanghua Li
Nov 21, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Mohamed Moustafa-FaragShaoying Ai
Oct 23, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Tanveer Ahmad KhanMohd Saleem
Apr 4, 2021·International Journal of Molecular Sciences·Dung Minh Ha-TranChieh-Chen Huang
May 1, 2021·Plant Physiology and Biochemistry : PPB·Feiyu YanGanghua Li
Jun 4, 2021·Plant Physiology and Biochemistry : PPB·Feiyu YanGanghua Li
Dec 16, 2021·Plant & Cell Physiology·Morteza Soleimani AghdamFrancisco J Corpas

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Methods Mentioned

BETA
ELISA
PCR
salt stress
environmental stresses

Software Mentioned

Gen 5 Data Analysis
Statistical Package for the Social Sciences ( SPSS
SPSS

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