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Excess Copper-Induced Alterations of Protein Profiles and Related Physiological Parameters in Citrus Leaves.


ABSTRACT: This present study examined excess copper (Cu) effects on seedling growth, leaf Cu concentration, gas exchange, and protein profiles identified by a two-dimensional electrophoresis (2-DE) based mass spectrometry (MS) approach after Citrus sinensis and Citrus grandis seedlings were treated for six months with 0.5 (control), 200, 300, or 400 ?M CuCl2. Forty-one and 37 differentially abundant protein (DAP) spots were identified in Cu-treated C. grandis and C. sinensis leaves, respectively, including some novel DAPs that were not reported in leaves and/or roots. Most of these DAPs were identified only in C. grandis or C. sinensis leaves. More DAPs increased in abundances than DAPs decreased in abundances were observed in Cu-treated C. grandis leaves, but the opposite was true in Cu-treated C. sinensis leaves. Over 50% of DAPs were associated with photosynthesis, carbohydrate, and energy metabolism. Cu-toxicity-induced reduction in leaf CO2 assimilation might be caused by decreased abundances of proteins related to photosynthetic electron transport chain (PETC) and CO2 assimilation. Cu-effects on PETC were more pronounced in C. sinensis leaves than in C. grandis leaves. DAPs related to antioxidation and detoxification, protein folding and assembly (viz., chaperones and folding catalysts), and signal transduction might be involved in Citrus Cu-toxicity and Cu-tolerance.

SUBMITTER: Huang WL 

PROVIDER: S-EPMC7154894 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Excess Copper-Induced Alterations of Protein Profiles and Related Physiological Parameters in Citrus Leaves.

Huang Wei-Lin WL   Wu Feng-Lin FL   Huang Hui-Yu HY   Huang Wei-Tao WT   Deng Chong-Ling CL   Yang Lin-Tong LT   Huang Zeng-Rong ZR   Chen Li-Song LS  

Plants (Basel, Switzerland) 20200228 3


This present study examined excess copper (Cu) effects on seedling growth, leaf Cu concentration, gas exchange, and protein profiles identified by a two-dimensional electrophoresis (2-DE) based mass spectrometry (MS) approach after <i>Citrus</i> <i>sinensis</i> and <i>Citrus</i> <i>grandis</i> seedlings were treated for six months with 0.5 (control), 200, 300, or 400 μM CuCl<sub>2</sub>. Forty-one and 37 differentially abundant protein (DAP) spots were identified in Cu-treated <i>C.</i> <i>grand  ...[more]

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