title: iTRAQ-based quantitative proteomic analysis reveals proteomic changes in leaves of cultivated tobacco (Nicotiana tabacum) in response to drought stress.
abstract: Drought is one of the most severe forms of abiotic stresses that threaten the survival of plants, including crops. In turn, plants dramatically change their physiology to increase drought tolerance, including reconfiguration of proteomes. Here, we studied drought-induced proteomic changes in leaves of cultivated tobacco (Nicotiana tabacum), a solanaceous plant, using the isobaric tags for relative and absolute quantitation (iTRAQ)-based protein labeling technology. Of identified 5570 proteins totally, drought treatment increased and decreased abundance of 260 and 206 proteins, respectively, compared with control condition. Most of these differentially regulated proteins are involved in photosynthesis, metabolism, and stress and defense. Although abscisic acid (ABA) levels greatly increased in drought-treated tobacco leaves, abundance of detected ABA biosynthetic enzymes showed no obvious changes. In contrast, heat shock proteins (HSPs), thioredoxins, ascorbate-, glutathione-, and hydrogen peroxide (H2O2)-related proteins were up- or down-regulated in drought-treated tobacco leaves, suggesting that chaperones and redox signaling are important for tobacco tolerance to drought, and it is likely that redox-induced posttranslational modifications play an important role in modulating protein activity. This study not only provides a comprehensive dataset on overall protein changes in drought-treated tobacco leaves, but also shed light on the mechanism by which solanaceous plants adapt to drought stress.
authors.affiliation: Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Electronic address: xiehe126@126.com.
authors.forename: He
authors.initials: H
authors.lastname: Xie
authors.affiliation: Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Electronic address: gresea_young@hotmail.com.
authors.forename: Da-Hai
authors.initials: DH
authors.lastname: Yang
authors.affiliation: Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Electronic address: 334758770@qq.com.
authors.forename: Heng
authors.initials: H
authors.lastname: Yao
authors.affiliation: Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Electronic address: 30431@163.com.
authors.forename: Ge
authors.initials: G
authors.lastname: Bai
authors.affiliation: Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Electronic address: duckzyhsm@163.com.
authors.forename: Yi-Han
authors.initials: YH
authors.lastname: Zhang
authors.affiliation: Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Electronic address: xiaobg@263.net.
authors.forename: Bing-Guang
authors.initials: BG
authors.lastname: Xiao
mesh_terms: D000064:Acclimatization / Q000502:physiology; D055864:Droughts; D018506:Gene Expression Regulation, Plant / Q000502:physiology; D006360:Heat-Shock Proteins / Q000378:metabolism; D018869:Heat-Shock Response / Q000502:physiology*; D007553:Isotope Labeling / Q000379:methods; D010449:Peptide Mapping / Q000379:methods; D018515:Plant Leaves / Q000502:physiology*; D010940:Plant Proteins / Q000378:metabolism*; D020543:Proteome / Q000378:metabolism*; D040901:Proteomics / Q000379:methods; D053719:Tandem Mass Spectrometry / Q000379:methods; D014026:Nicotiana / Q000502:physiology*
chemical_list: D006360:Heat-Shock Proteins; D010940:Plant Proteins; D020543:Proteome
keywords: Drought; Heat shock protein; Proteome; Redox; Tobacco; iTRAQ