mmphillips at stkate.edu wrote:
> I have a number of student groups wanting to do experiments investigating
> the effects of different colors of light on plant growth. I've not been
> satisfied with what we've used in the past to try to do this -- does anyone
> have suggestions of good sources for colored films/gels/whatever to use to
> filter the light? Or are there light bulbs out there that could be used?
> I'm not finding stuff in the Carolina catalog, Wards, etc. but may be
> looking in the wrong place.
Sigma sells tinted "phytatrays" (p 2355 of the '00-'01 catalog) that
are either clear, blue, red or yellow (see the catalog for wavelength
cutoffs). At about 4" cubed they would work for small plants and at
about $1 each they are affordable. Sigma cites Hangarter et al.
(1991), Repression of plant tissue culture growth by light is caused
by photochemical change in the culture medium. Plant Sci. 79:253-257.
Has anyone tried using them for soil-grown plants?
Jon
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Jonathan D. Monroe Associate Professor
Department of Biology office: 540-568-6649
MSC 7801 lab: 540-568-6045
James Madison University fax: 540-568-3333
Harrisonburg, VA 22807 email: monroejd at jmu.eduhttp://csm.jmu.edu/biology/monroejd/jmonroe.html
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