Multiple Cyclic Nucleotide-Gated Channels Coordinate Calcium Oscillations and Polar Growth of Root Hairs

    April 2019 in “ The Plant Journal ”
    Christa Brost, Tanja Studtrucker, Ronny Reimann, Philipp Denninger, Jennifer Czekalla, Melanie Krebs, Ben Fabry, Karin Schumacher, Guido Großmann, Petra Dietrich
    Studysummary This study found that CNGC 6, CNGC 9, and CNGC 14 are crucial for maintaining calcium oscillations necessary for normal root hair growth in plants, with mutations leading to defects like swelling and bursting. Our plain-language summary of this paper — not a Tressless recommendation.
    The study demonstrated that cyclic nucleotide-gated channels (CNGCs) CNGC6, CNGC9, and CNGC14 were essential for maintaining calcium oscillations and proper root hair development in Arabidopsis thaliana. Mutants lacking these channels exhibited disrupted calcium dynamics, leading to root hair defects such as bulging, branching, and bursting. The triple mutant cngc6/9/14 showed severe developmental issues, failing to form normal root hairs. CNGC9 was particularly crucial for stabilizing tip-focused calcium oscillations. The research highlighted the specific expression and plasma membrane localization of these CNGCs, underscoring their role in coordinating calcium signaling and ensuring root hair integrity and growth.
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