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Molecular interactions between wheat and the insect herbivore sitobion avenae (cereal aphid); analysis of changes to the wheat proteome

Ferry, N, Stavroulakis, S, Guan, WZ, Davison, GM, Bell, H, Weaver, R, Down, R, Gatehouse, JA and Gatehouse, AMR 2011, 'Molecular interactions between wheat and the insect herbivore sitobion avenae (cereal aphid); analysis of changes to the wheat proteome' , Proteomics, 11 (10) , pp. 1985-2002.

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    Abstract

    Aphids are major insect pests of cereal crops, acting as virus vectors as well as causing direct damage. The responses of wheat to infestation by cereal aphid (Sitobion avenae) were investigated in a proteomic analysis. Approximately, 500 protein spots were reproducibly detected in the extracts from leaves of wheat seedlings after extraction and 2-DE. Sixty-seven spots differed significantly between control and infested plants following 24 h of aphid feeding, with 27 and 11 up-regulated, and 8 and 21 down-regulated, in local or systemic tissues, respectively. After 8 days, 80 protein spots differed significantly between control and aphid treatments with 13 and 18 up-regulated and 27 and 22 down-regulated in local or systemic tissues, respectively. As positive controls, plants were treated with salicylic acid or methyl jasmonate; 81 and 37 differentially expressed protein spots, respectively, were identified for these treatments. Approximately, 50% of differentially expressed protein spots were identified by PMF, revealing that the majority of proteins altered by aphid infestation were involved in metabolic processes and photosynthesis. Other proteins identified were involved in signal transduction, stress and defence, antioxidant activity, regulatory processes, and hormone responses. Responses to aphid attack at the proteome level were broadly similar to basal non-specific defence and stress responses in wheat, with evidence of down-regulation of insect-specific defence mechanisms, in agreement with the observed lack of aphid resistance in commercial wheat lines.

    Item Type: Article
    Uncontrolled Keywords: Aphid, defence, plant proteomics, resistance, stress, wheat
    Themes: Built and Human Environment
    Schools: Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences
    Journal or Publication Title: Proteomics
    Publisher: Wiley-VCH
    Refereed: Yes
    ISSN: 1615-9853
    Depositing User: Dr Natalie Ferry
    Date Deposited: 06 Oct 2011 12:51
    Last Modified: 10 Jul 2014 09:43
    URI: http://usir.salford.ac.uk/id/eprint/17943

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