Coronatine-insensitive 1 (COI1) mediates transcriptional responses of Arabidopsis thaliana to external potassium supply

Patrick Armengaud, Rainer Breitling, Anna Amtmann

    Research output: Contribution to journalArticlepeer-review


    The ability to adjust growth and development to the availability of mineral nutrients in the soil is an essential life skill of plants but the underlying signaling pathways are poorly understood. In Arabidopsis thaliana, shortage of potassium (K) induces a number of genes related to the phytohormone jasmonic acid (JA). Using comparative microarray analysis of wild-type and coi1-16 mutant plants, we classified transcriptional responses to K with respect to their dependence on COI1, a central component of oxylipin signaling. Expression profiles obtained in a short-term experiment clearly distinguished between COI1-dependent and COI1-independent K-responsive genes, and identified both known and novel targets of JA-COI1-signaling. During long-term K-deficiency, coi-16 mutants displayed de novo responses covering similar functions as COI1-targets except for defense. A putative role of JA for enhancing the defense potential of K-deficient plants was further supported by the observation that plants grown on low K were less damaged by thrips than plants grown with sufficient K.
    Original languageEnglish
    Pages (from-to)390-405
    Number of pages15
    JournalMolecular Plant
    Issue number2
    Publication statusPublished - Mar 2010


    • Arabidopsis
    • Hormonal regulation
    • Nutrition
    • Plant-insect interactions
    • Secondary metabolism/natural products
    • Transcriptome analysis


    Dive into the research topics of 'Coronatine-insensitive 1 (COI1) mediates transcriptional responses of Arabidopsis thaliana to external potassium supply'. Together they form a unique fingerprint.

    Cite this