Rhythms of differentiation and diacylglycerol in Neurospora

P. L. Lakin-Thomas, V. D. Gooch, Mark Ramsdale

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Although the fungus Neurospora crassa is a relatively simple lower eukaryote, its circadian system may be more complex than previously thought. In this paper we review evidence suggesting that there may be several output pathways coupled in complex ways to a single oscillator, or that there may be more than one oscillator driving independent output pathways. We have described two new rhythms in Neurospora that are not tightly coupled to the rhythm of conidiation bands that is the standard assay for the state of the Neurospora circadian clock. The first is a rhythm in the timing of differentiation, i.e. the production of aerial hyphae and spores, Large regions of the mycelium differentiate synchronously, as if responding to a spatially widespread signal. This rhythm may be distinct from the timer that sets the determination switch controlling the spatial pattern of conidiation bands. The second new rhythm is an oscillation in the levels of the neutral lipid diacylglycerol (DAG). This rhythm is found in all regions of a colony and is not always in phase with the rhythm of conidiation bands. The DAG rhythm shares some characteristics with the differentiation rhythm and has the potential to act as the signal that induces rhythmic differentiation.

    Original languageEnglish
    Pages (from-to)1711-1715
    Number of pages4
    JournalPhilosophical Transactions of the Royal Society of London. Series B: Biological sciences
    Volume356
    Issue number1415
    DOIs
    Publication statusPublished - 2001

    Keywords

    • Neurospora
    • circadian
    • clock
    • conidiation
    • diacylglycerol
    • CIRCADIAN-RHYTHMS
    • TEMPERATURE COMPENSATION
    • CHOLINE DEPLETION
    • CRASSA
    • FREQUENCY
    • CULTURES
    • CLOCKS

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