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Exogenous Melatonin Confers Cadmium Tolerance by Counterbalancing the Hydrogen Peroxide Homeostasis in Wheat Seedlings
Ni, Jun1; Wang, Qiaojian2; Shah, Faheem Afzal2; Liu, Wenbo1; Wang, Dongdong2; Huang, Shengwei1; Fu, Songling2; Wu, Lifang1
2018-04-01
Source PublicationMOLECULES
ISSN1420-3049
Abstract

Melatonin has emerged as a research highlight regarding its important role in regulating plant growth and the adaptation to the environmental stresses. In this study, we investigated how melatonin prevented the cadmium toxicity to wheat seedlings. The results demonstrated that cadmium induced the expression of melatonin biosynthesis-related genes and cause a significant increase of endogenous melatonin level. Melatonin treatment drastically alleviated the cadmium toxicity, resulting in increased plant height, biomass accumulation, and root growth. Cadmium and senescence treatment significantly increased the endogenous level of hydrogen peroxide, which was strictly counterbalanced by melatonin. Furthermore, melatonin treatment caused a significant increase of GSH (reduced glutathione) content and the GSH/GSSG (oxidized glutathione) ratio. The activities of two key antioxidant enzymes, ascorbate peroxidase (APX) and superoxide dismutase (SOD), but not catalase (CAT) and peroxidase (POD), were specifically improved by melatonin. Additionally, melatonin not only promoted the primary root growth, but also drastically enhanced the capacity of the seedling roots to degrade the exogenous hydrogen peroxide. These results suggested that melatonin played a key role in maintaining the hydrogen peroxide homeostasis, via regulation of the antioxidant systems. Conclusively, this study revealed a crucial protective role of melatonin in the regulation of cadmium resistance in wheat.

Keywordmelatonin wheat cadmium stress hydrogen peroxide senescence
DOI10.3390/molecules23040799
WOS KeywordSEROTONIN N-ACETYLTRANSFERASE ; INDUCED LEAF SENESCENCE ; SALT STRESS TOLERANCE ; ABSCISIC-ACID ; PLANT-GROWTH ; ARABIDOPSIS-THALIANA ; REDOX HOMEOSTASIS ; SEED-GERMINATION ; OXIDATIVE STRESS ; CHILLING STRESS
Indexed BySCI
Language英语
Funding ProjectGrant of the President Foundation of Hefei Institutes of Physical Science of Chinese Academy of Sciences[YZJJ201619] ; Anhui Natural Science Foundation[1708085QC70] ; Grant of the President Foundation of Hefei Institutes of Physical Science of Chinese Academy of Sciences[YZJJ201502] ; National Natural Science Foundation of China[31500531] ; Science and Technology Service program of Chinese Academy of Sciences[KFJ-STS-ZDTP-002] ; Science and Technology Service program of Chinese Academy of Sciences[KFJ-STS-ZDTP-002] ; National Natural Science Foundation of China[31500531] ; Grant of the President Foundation of Hefei Institutes of Physical Science of Chinese Academy of Sciences[YZJJ201502] ; Anhui Natural Science Foundation[1708085QC70] ; Grant of the President Foundation of Hefei Institutes of Physical Science of Chinese Academy of Sciences[YZJJ201619]
WOS Research AreaBiochemistry & Molecular Biology ; Chemistry
WOS SubjectBiochemistry & Molecular Biology ; Chemistry, Multidisciplinary
WOS IDWOS:000434717300091
PublisherMDPI
Citation statistics
Cited Times:60[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/38325
Collection技术生物与农业工程研究所
Corresponding AuthorWu, Lifang
Affiliation1.Chinese Acad Sci, Hefei Inst Phys Sci, Key Lab High Magnet Field & Ion Beam Phys Biol, Hefei 230031, Anhui, Peoples R China
2.Anhui Agr Univ, Sch Forestry & Landscape Architecture, Hefei 230031, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Ni, Jun,Wang, Qiaojian,Shah, Faheem Afzal,et al. Exogenous Melatonin Confers Cadmium Tolerance by Counterbalancing the Hydrogen Peroxide Homeostasis in Wheat Seedlings[J]. MOLECULES,2018,23(4):18.
APA Ni, Jun.,Wang, Qiaojian.,Shah, Faheem Afzal.,Liu, Wenbo.,Wang, Dongdong.,...&Wu, Lifang.(2018).Exogenous Melatonin Confers Cadmium Tolerance by Counterbalancing the Hydrogen Peroxide Homeostasis in Wheat Seedlings.MOLECULES,23(4),18.
MLA Ni, Jun,et al."Exogenous Melatonin Confers Cadmium Tolerance by Counterbalancing the Hydrogen Peroxide Homeostasis in Wheat Seedlings".MOLECULES 23.4(2018):18.
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