Re: Petiole Shortening
I forwarded your comments on to Jim
and was glad to find you think, as I do, that the effect might be reversible.
That would be an elegant experiment that would prove that this is a physical
characteristic of the plant.
As far as the normal shortening (or
lengthening) of petioles and internodes and such in response to light,
my feeling is that this applies to new growth. Does anyone know otherwise?
This is a different case than that, and it has me puzzled.
being far from wise, just some short remarks.
My favourite would be the light quality,
e.g. the spectrum of the different flourescent tubes.
Try to get the technical details.
I would suspect that the new light has more
blue in it's spectrum and blue light is known to shorten plants (internodes,
In addition flourescent tubes "age",
they loose in respect to light intensity (and maybe the spectrum is altered
as well). You allready suspected that light intensity plays a role and
higher light intensities shorten plants as well. The new tube will probably
have an higher light intensity compared to the old one, let alone that
they might have the same power consumption.
A last important factor that leads to
short plants is UV light. However, I do not suspect that the new flourescent
tube emmits UV, but the details of the spectrum should show this, too.
And yes, I guess you can revert the pant
habitus by going back to the old light conditions.
Hope this helps,
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