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Int. J. Mol. Sci. 2017, 18(10), 2083;

H2O2 Is Involved in the Metallothionein-Mediated Rice Tolerance to Copper and Cadmium Toxicity

College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Authors to whom correspondence should be addressed.
Received: 5 September 2017 / Revised: 27 September 2017 / Accepted: 27 September 2017 / Published: 1 October 2017
(This article belongs to the Section Molecular Plant Sciences)
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Cadmium (Cd) and excess copper (Cu) are toxic to plants, causing a wide range of deleterious effects including the formation of reactive oxygen species. Metallothioneins (MTs) may protect plant cells from heavy metal toxicity by chelating heavy metals via cysteine thiol groups. They may also function as antioxidants. The study investigated the relationship of H2O2 production and ricMT expression in rice radicles and rice suspension cells under Cu or Cd stress. The results showed that H2O2 production in the rice radicles increased before Cu-induced ricMT expression, and after Cd-induced ricMT expression. Rice suspension cells of sense- and antisense-ricMT transgenic lines were obtained by an Agrobacterium-mediated transformation. Overexpression of ricMT significantly decreased the death rate of rice cells, which was accompanied by blocked H2O2 accumulation in rice suspension cells subject to Cu and Cd stress. Our findings confirm that H2O2 is involved in the MT-mediated tolerance of Cu and Cd toxicity in rice. View Full-Text
Keywords: H2O2; ricMT; rice suspension cells; Cu stress; Cd stress H2O2; ricMT; rice suspension cells; Cu stress; Cd stress

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhang, H.; Lv, S.; Xu, H.; Hou, D.; Li, Y.; Wang, F. H2O2 Is Involved in the Metallothionein-Mediated Rice Tolerance to Copper and Cadmium Toxicity. Int. J. Mol. Sci. 2017, 18, 2083.

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