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Int. J. Mol. Sci. 2016, 17(7), 1180; doi:10.3390/ijms17071180

Aluminum Toxicity-Induced Alterations of Leaf Proteome in Two Citrus Species Differing in Aluminum Tolerance

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1,2,4,*
1
Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2
Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
3
Institute of Materia Medica, Fujian Academy of Medical Sciences, Fuzhou 350001, China
4
The Higher Educational Key Laboratory of Fujian Province for Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China
*
Author to whom correspondence should be addressed.
Academic Editor: Setsuko Komatsu
Received: 13 May 2016 / Revised: 13 July 2016 / Accepted: 13 July 2016 / Published: 21 July 2016
(This article belongs to the Special Issue Plant Proteomic Research)
View Full-Text   |   Download PDF [573 KB, uploaded 21 July 2016]   |  

Abstract

Seedlings of aluminum-tolerant ‘Xuegan’ (Citrus sinensis) and Al-intolerant ‘sour pummelo’ (Citrus grandis) were fertigated for 18 weeks with nutrient solution containing 0 and 1.2 mM AlCl3·6H2O. Al toxicity-induced inhibition of photosynthesis and the decrease of total soluble protein only occurred in C. grandis leaves, demonstrating that C. sinensis had higher Al tolerance than C. grandis. Using isobaric tags for relative and absolute quantification (iTRAQ), we obtained more Al toxicity-responsive proteins from C. sinensis than from C. grandis leaves, which might be responsible for the higher Al tolerance of C. sinensis. The following aspects might contribute to the Al tolerance of C. sinensis: (a) better maintenance of photosynthesis and energy balance via inducing photosynthesis and energy-related proteins; (b) less increased requirement for the detoxification of reactive oxygen species and other toxic compounds, such as aldehydes, and great improvement of the total ability of detoxification; and (c) upregulation of low-phosphorus-responsive proteins. Al toxicity-responsive proteins related to RNA regulation, protein metabolism, cellular transport and signal transduction might also play key roles in the higher Al tolerance of C. sinensis. We present the global picture of Al toxicity-induced alterations of protein profiles in citrus leaves, and identify some new Al toxicity-responsive proteins related to various biological processes. Our results provide some novel clues about plant Al tolerance. View Full-Text
Keywords: aluminum toxicity; Citrus grandis; Citrus sinensis; iTRAQ; leaves; proteome aluminum toxicity; Citrus grandis; Citrus sinensis; iTRAQ; leaves; proteome
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Li, H.; Yang, L.-T.; Qi, Y.-P.; Guo, P.; Lu, Y.-B.; Chen, L.-S. Aluminum Toxicity-Induced Alterations of Leaf Proteome in Two Citrus Species Differing in Aluminum Tolerance. Int. J. Mol. Sci. 2016, 17, 1180.

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