Interaction of light and hormone signals in germinating seeds

Mitsunori Seo, Eiji Nambara, Giltsu Choi, Shinjiro Yamaguchi

    Research output: Contribution to journalReview articlepeer-review

    207 Citations (Scopus)

    Abstract

    Seed germination is regulated by several environmental factors, such as moisture, oxygen, temperature, light, and nutrients. Light is a critical regulator of seed germination in small-seeded plants, including Arabidopsis and lettuce. Phytochromes, a class of photoreceptors, play a major role in perceiving light to induce seed germination. Classical physiological studies have long suggested the involvement of gibberellin (GA) and abscisic acid (ABA) in the phytochrome-mediated germination response. Recent studies have demonstrated that phytochromes modulate endogenous levels of GA and ABA, as well as GA responsiveness. Several key components that link the perception of light and the modulation of hormone levels and responsiveness have been identified. Complex regulatory loops between light, GA and ABA signaling pathways have been uncovered.

    Original languageEnglish
    Pages (from-to)463-472
    Number of pages10
    JournalPlant Molecular Biology
    Volume69
    Issue number4
    DOIs
    Publication statusPublished - 2009 Mar

    Keywords

    • Abscisic acid
    • Gibberellin
    • Phytochrome
    • Seed germination

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Genetics
    • Plant Science

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