Melatonin Improves the Photosynthetic Carbon Assimilation and Antioxidant Capacity in Wheat Exposed to Nano-ZnO Stress

The release of nanoparticles into the environment is inevitable, which has raised global environmental concern. Melatonin is involved in various stress responses in plants. The present study investigated the effects of melatonin on photosynthetic carbon (C) assimilation and plant growth in nano-ZnO...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2017-10, Vol.22 (10), p.1727
Main Authors: Zuo, Zhiyu, Sun, Luying, Wang, Tianyu, Miao, Peng, Zhu, Xiancan, Liu, Shengqun, Song, Fengbin, Mao, Hanping, Li, Xiangnan
Format: Article
Language:English
Subjects:
antioxidant
Antioxidants
Antioxidants - pharmacology
Biological assimilation
Carbon - chemistry
Carbon - metabolism
Carbon Dioxide - toxicity
Chlorophyll
Chlorophyll - metabolism
chlorophyll fluorescence
Electron Transport
Environmental perception
Leaves
Melatonin
Melatonin - pharmacology
nanoparticle
Nanoparticles
Nanoparticles - toxicity
Photosynthesis
Photosynthesis - drug effects
phytotoxicity
Plant growth
Plant Leaves - drug effects
Ribulose-bisphosphate carboxylase
Triticum - drug effects
Triticum - genetics
Triticum aestivum
Wheat
Zinc oxide
Zinc Oxide - toxicity
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Summary:The release of nanoparticles into the environment is inevitable, which has raised global environmental concern. Melatonin is involved in various stress responses in plants. The present study investigated the effects of melatonin on photosynthetic carbon (C) assimilation and plant growth in nano-ZnO stressed plants. It was found that melatonin improved the photosynthetic C assimilation in nano-ZnO stressed wheat plants, mainly due to the enhanced photosynthetic energy transport efficiency, higher chlorophyll concentration and higher activities of Rubisco and ATPases. In addition, melatonin enhanced the activities of antioxidant enzymes to protect the photosynthetic electron transport system in wheat leaves against the oxidative burst caused by nano-ZnO stress. These results suggest that melatonin could improve the tolerance of wheat plants to nano-ZnO stress.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules22101727