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Int. J. Mol. Sci. 2017, 18(10), 2055; doi:10.3390/ijms18102055

The Phosphoproteomic Response of Rice Seedlings to Cadmium Stress

1
State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China
2
College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China
3
College of Agronomy, Hunan Agricultural University, Changsha 410128, China
*
Authors to whom correspondence should be addressed.
Received: 5 September 2017 / Revised: 19 September 2017 / Accepted: 22 September 2017 / Published: 27 September 2017
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

The environmental damage caused by cadmium (Cd) pollution is of increasing concern in China. While the overall plant response to Cd has been investigated in some depth, the contribution (if any) of protein phosphorylation to the detoxification of Cd and the expression of tolerance is uncertain. Here, the molecular basis of the plant response has been explored in hydroponically raised rice seedlings exposed to 10 μΜ and 100 μΜ Cd2+ stress. An analysis of the seedlings’ quantitative phosphoproteome identified 2454 phosphosites, associated with 1244 proteins. A total of 482 of these proteins became differentially phosphorylated as a result of exposure to Cd stress; the number of proteins affected in this way was six times greater in the 100 μΜ Cd2+ treatment than in the 10 μΜ treatment. A functional analysis of the differentially phosphorylated proteins implied that a significant number was involved in signaling, in stress tolerance and in the neutralization of reactive oxygen species, while there was also a marked representation of transcription factors. View Full-Text
Keywords: cadmium; rice (Oryza sativa L.); iTRAQ; phosphoproteome; post-translational modification cadmium; rice (Oryza sativa L.); iTRAQ; phosphoproteome; post-translational modification
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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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MDPI and ACS Style

Zhong, M.; Li, S.; Huang, F.; Qiu, J.; Zhang, J.; Sheng, Z.; Tang, S.; Wei, X.; Hu, P. The Phosphoproteomic Response of Rice Seedlings to Cadmium Stress. Int. J. Mol. Sci. 2017, 18, 2055.

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