I'm not an expert on the Neurospora cell cycle or on circadian rhythms.
Those interested might consult some of the recent work by JC Dunlap and J
Cell cycle is actually a misnomer in many ways for syncitial organisms
like Neurospora, one really means nuclear cycle.
One comment on realtionship between growth rate and circadian rhythm: I
thought a characteristic of circadian rhythms is that they were
growth-rate and temperature-compensated. In my experience with fungi,
many grow fast, and most seem to have some types of rhythms. These can
often be seen as "rings" on those forgotten LB or YPD plates in which a
contaminant fell in the middle and conidiated each day for about a week.
Fred Kippert wrote:
> Pierre-Charles Romond <promond at ulb.ac.be> wrote:
> > I am working on the neurospora crassa
> > circadian rhythm modelling.
> > I have two questions about Neurospora crassa.
> > Does anyone know the period of neurospora cell
> > cycle? Is there any known relationships between the
> > circadian rhythm and the cell cycle?
> > Thanks in advance.
>> The length of the cell cycle of Neuropora crassa is much shorter
> than the circadian period. Under the conditions of most circadian
> experiments it is probably around 3-4 hours, but can be as short as
> 1 hour. There is no published study on the relationship between
> circadian clock and cell cycle in N.c. That circadian rhythms
> occur in an organism which is growing so fast is probably the
> exception and constrasts the situation in other eukaryotes including
> the yeasts S. pombe and S. cerevisiae.
>> Fred Kippert
>> Fred Kippert
> Yeast Chronobiology Lab
> Institute of Cell, Animal and Population Biology
> University of Edinburgh
> West Mains Road
> Edinburgh EH9 3JT
> Scotland, UK
>> Tel 0131 650 5488
> FAX 0131 650 6564
> e-mail fkippert at srv0.bio.ed.ac.uk> URL: http://helios.bto.ed.ac.uk/icapb/seminars/fyc/yeastchrono.html