The cap-binding complex modulates ABA-responsive transcript splicing during germination in barley (Hordeum vulgare)

Ewa Sybilska, Anna Collin, Bahareh Sadat Haddadi, Luis A. J. Mur, Manfred Beckmann, Wenbin Guo, Craig G. Simpson, Agata Daszkowska-Golec (Lead / Corresponding author)

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    1 Citation (Scopus)
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    Abstract

    To decipher the molecular bases governing seed germination, this study presents the pivotal role of the cap-binding complex (CBC), comprising CBP20 and CBP80, in modulating the inhibitory effects of abscisic acid (ABA) in barley. Using both single and double barley mutants in genes encoding the CBC, we revealed that the double mutant hvcbp20.ab/hvcbp80.b displays ABA insensitivity, in stark contrast to the hypersensitivity observed in single mutants during germination. Our comprehensive transcriptome and metabolome analysis not only identified significant alterations in gene expression and splicing patterns but also underscored the regulatory nexus among CBC, ABA, and brassinosteroid (BR) signaling pathways.

    Original languageEnglish
    Article number18278
    Number of pages17
    JournalScientific Reports
    Volume14
    DOIs
    Publication statusPublished - 7 Aug 2024

    Keywords

    • ABA
    • Alternative splicing
    • Barley
    • Cap-binding complex
    • Embryo
    • Germination
    • Transcriptome

    ASJC Scopus subject areas

    • General

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