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Open AccessArticle

Nitric Oxide Enhancing Resistance to PEG-Induced Water Deficiency is Associated with the Primary Photosynthesis Reaction in Triticum aestivum L.

Collaborative Innovation Center of Henan Grain Crops and State Key Laboratory of Wheat and Maize Crop Science/College of Agronomy, Henan Agricultural University, Zhengzhou 450001, China
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Int. J. Mol. Sci. 2018, 19(9), 2819; https://doi.org/10.3390/ijms19092819
Received: 9 August 2018 / Revised: 10 September 2018 / Accepted: 12 September 2018 / Published: 18 September 2018
(This article belongs to the Special Issue Chloroplast)
Photosynthesis is affected by water-deficiency (WD) stress, and nitric oxide (NO) is a free radical that participates in the photosynthesis process. Previous studies have suggested that NO regulates excitation-energy distribution of photosynthesis under WD stress. Here, quantitative phosphoproteomic profiling was conducted using iTRAQ. Differentially phosphorylated protein species (DEPs) were identified in leaves of NO- or polyethylene glycol (PEG)-treated wheat seedlings (D), and in control seedlings. From 1396 unique phosphoproteins, 2257 unique phosphorylated peptides and 2416 phosphorylation sites were identified. Of these, 96 DEPs displayed significant changes (≥1.50-fold, p < 0.01). These DEPs are involved in photosynthesis, signal transduction, etc. Furthermore, phosphorylation of several DEPs was upregulated by both D and NO treatments, but downregulated only in NO treatment. These differences affected the chlorophyll A–B binding protein, chloroplast post-illumination chlorophyll-fluorescence-increase protein, and SNT7, implying that NO indirectly regulated the absorption and transport of light energy in photosynthesis in response to WD stress. The significant difference of chlorophyll (Chl) content, Chl a fluorescence-transient, photosynthesis index, and trapping and transport of light energy further indicated that exogenous NO under D stress enhanced the primary photosynthesis reaction compared to D treatment. A putative pathway is proposed to elucidate NO regulation of the primary reaction of photosynthesis under WD. View Full-Text
Keywords: nitric oxide; 20% PEG-induced water deficiency; phosphoproteomic; Triticum aestivum L.; primary reaction of photosynthesis nitric oxide; 20% PEG-induced water deficiency; phosphoproteomic; Triticum aestivum L.; primary reaction of photosynthesis
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MDPI and ACS Style

Shao, R.; Zheng, H.; Jia, S.; Jiang, Y.; Yang, Q.; Kang, G. Nitric Oxide Enhancing Resistance to PEG-Induced Water Deficiency is Associated with the Primary Photosynthesis Reaction in Triticum aestivum L. Int. J. Mol. Sci. 2018, 19, 2819. https://doi.org/10.3390/ijms19092819

AMA Style

Shao R, Zheng H, Jia S, Jiang Y, Yang Q, Kang G. Nitric Oxide Enhancing Resistance to PEG-Induced Water Deficiency is Associated with the Primary Photosynthesis Reaction in Triticum aestivum L. International Journal of Molecular Sciences. 2018; 19(9):2819. https://doi.org/10.3390/ijms19092819

Chicago/Turabian Style

Shao, Ruixin; Zheng, Huifang; Jia, Shuangjie; Jiang, Yanping; Yang, Qinghua; Kang, Guozhang. 2018. "Nitric Oxide Enhancing Resistance to PEG-Induced Water Deficiency is Associated with the Primary Photosynthesis Reaction in Triticum aestivum L." Int. J. Mol. Sci. 19, no. 9: 2819. https://doi.org/10.3390/ijms19092819

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