Melatonin Confers Plant Cadmium Tolerance: An Update

Cadmium (Cd) is one of the most injurious heavy metals, affecting plant growth and development. Melatonin (<i>N</i>-acetyl-5-methoxytryptamine) was discovered in plants in 1995, and it is since known to act as a multifunctional molecule to alleviate abiotic and biotic stresses, especiall...

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Autores principales:	Quan Gu, Chuyan Wang, Qingqing Xiao, Ziping Chen, Yi Han
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	antioxidant defense systems Cd stress hydrogen sulfide melatonin oxidative stress transportation and sequestration Biology (General) QH301-705.5 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c06b8ebdc8294305b81a68881cce4dfe
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id	oai:doaj.org-article:c06b8ebdc8294305b81a68881cce4dfe
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spelling	oai:doaj.org-article:c06b8ebdc8294305b81a68881cce4dfe2021-11-11T17:09:48ZMelatonin Confers Plant Cadmium Tolerance: An Update10.3390/ijms2221117041422-00671661-6596https://doaj.org/article/c06b8ebdc8294305b81a68881cce4dfe2021-10-01T00:00:00Zhttps://www.mdpi.com/1422-0067/22/21/11704https://doaj.org/toc/1661-6596https://doaj.org/toc/1422-0067Cadmium (Cd) is one of the most injurious heavy metals, affecting plant growth and development. Melatonin (<i>N</i>-acetyl-5-methoxytryptamine) was discovered in plants in 1995, and it is since known to act as a multifunctional molecule to alleviate abiotic and biotic stresses, especially Cd stress. Endogenously triggered or exogenously applied melatonin re-establishes the redox homeostasis by the improvement of the antioxidant defense system. It can also affect the Cd transportation and sequestration by regulating the transcripts of genes related to the major metal transport system, as well as the increase in glutathione (GSH) and phytochelatins (PCs). Melatonin activates several downstream signals, such as nitric oxide (NO), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), and salicylic acid (SA), which are required for plant Cd tolerance. Similar to the physiological functions of NO, hydrogen sulfide (H<sub>2</sub>S) is also involved in the abiotic stress-related processes in plants. Moreover, exogenous melatonin induces H<sub>2</sub>S generation in plants under salinity or heat stress. However, the involvement of H<sub>2</sub>S action in melatonin-induced Cd tolerance is still largely unknown. In this review, we summarize the progresses in various physiological and molecular mechanisms regulated by melatonin in plants under Cd stress. The complex interactions between melatonin and H<sub>2</sub>S in acquisition of Cd stress tolerance are also discussed.Quan GuChuyan WangQingqing XiaoZiping ChenYi HanMDPI AGarticleantioxidant defense systemsCd stresshydrogen sulfidemelatoninoxidative stresstransportation and sequestrationBiology (General)QH301-705.5ChemistryQD1-999ENInternational Journal of Molecular Sciences, Vol 22, Iss 11704, p 11704 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	antioxidant defense systems Cd stress hydrogen sulfide melatonin oxidative stress transportation and sequestration Biology (General) QH301-705.5 Chemistry QD1-999
spellingShingle	antioxidant defense systems Cd stress hydrogen sulfide melatonin oxidative stress transportation and sequestration Biology (General) QH301-705.5 Chemistry QD1-999 Quan Gu Chuyan Wang Qingqing Xiao Ziping Chen Yi Han Melatonin Confers Plant Cadmium Tolerance: An Update
description	Cadmium (Cd) is one of the most injurious heavy metals, affecting plant growth and development. Melatonin (<i>N</i>-acetyl-5-methoxytryptamine) was discovered in plants in 1995, and it is since known to act as a multifunctional molecule to alleviate abiotic and biotic stresses, especially Cd stress. Endogenously triggered or exogenously applied melatonin re-establishes the redox homeostasis by the improvement of the antioxidant defense system. It can also affect the Cd transportation and sequestration by regulating the transcripts of genes related to the major metal transport system, as well as the increase in glutathione (GSH) and phytochelatins (PCs). Melatonin activates several downstream signals, such as nitric oxide (NO), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), and salicylic acid (SA), which are required for plant Cd tolerance. Similar to the physiological functions of NO, hydrogen sulfide (H<sub>2</sub>S) is also involved in the abiotic stress-related processes in plants. Moreover, exogenous melatonin induces H<sub>2</sub>S generation in plants under salinity or heat stress. However, the involvement of H<sub>2</sub>S action in melatonin-induced Cd tolerance is still largely unknown. In this review, we summarize the progresses in various physiological and molecular mechanisms regulated by melatonin in plants under Cd stress. The complex interactions between melatonin and H<sub>2</sub>S in acquisition of Cd stress tolerance are also discussed.
format	article
author	Quan Gu Chuyan Wang Qingqing Xiao Ziping Chen Yi Han
author_facet	Quan Gu Chuyan Wang Qingqing Xiao Ziping Chen Yi Han
author_sort	Quan Gu
title	Melatonin Confers Plant Cadmium Tolerance: An Update
title_short	Melatonin Confers Plant Cadmium Tolerance: An Update
title_full	Melatonin Confers Plant Cadmium Tolerance: An Update
title_fullStr	Melatonin Confers Plant Cadmium Tolerance: An Update
title_full_unstemmed	Melatonin Confers Plant Cadmium Tolerance: An Update
title_sort	melatonin confers plant cadmium tolerance: an update
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c06b8ebdc8294305b81a68881cce4dfe
work_keys_str_mv	AT quangu melatoninconfersplantcadmiumtoleranceanupdate AT chuyanwang melatoninconfersplantcadmiumtoleranceanupdate AT qingqingxiao melatoninconfersplantcadmiumtoleranceanupdate AT zipingchen melatoninconfersplantcadmiumtoleranceanupdate AT yihan melatoninconfersplantcadmiumtoleranceanupdate
_version_	1718432200749219840

Melatonin Confers Plant Cadmium Tolerance: An Update

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