Re: Nightlife explained
With all the talk about pumpkins growing more at night, surely it is
possible to increase growth rate by physically
(greenhouses/shadehouses/humidifiers etc) and chemically (hormonal
supplements/alterations) changing growing conditions so that while
sufficient levels of photosynthesis are maintained, a greater than
normal rate of growth is achieved. Maybe this is the future of pumpkin
growing - but I would personally prefer the ol' hard work and manure
trick.
john who is very happily watch his first male flowers open after some
exceptional, if slightly hot, weather, and who will go out first thing
in the morning with tape measure in hand.
Richard J. Noffke wrote:
[snip]
> At night the plant is not actively photosynthesizing so the stomates are
> mostly closed, thus reducing evapotranspiration. Also the relative
> humidity is lower so the potential difference is lower. You can think of a
> growing cell like a balloon. The turgor pressure is the air you blow in it
> to blow it up and the hormone is present to make the rubber flexible enough
> to expand.....and so they grow mostly at night.
>
> Or maybe they just like the night life....
>
> Rick
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--
John McKinney
http://www.wantree.com.au/~oliverm/pumpkin.htm
o*@wantree.com.au
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