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  • Title: Role of calcium ions in phytochrome responses: an update.
    Author: Roux SJ, Wayne RO, Datta N.
    Journal: Physiol Plant; 1986; 66():344-8. PubMed ID: 11538657.
    Abstract:
    Recent findings related to the role of calcium ions in phytochrome responses are reviewed and summarized. Hypotheses tested are the activation of calmodulin by light-regulated Ca2+ transport in cells and the photoinduction of calmodulin-activated enzyme activities. Discussion focuses on evidence that Ca2+ helps to regulate phytochrome responses, calcium requirements for photoinduced spore germination in the fern Onoclea, Ca2+ fluxes and phytochrome function in the alga Mougeotia, calmodulin antagonist blocking of red-light stimulated chloroplast rotation, the role of phosphorylation in calmodulin-regulated responses, and phytochrome regulation of nuclear protein phosphorylation.
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