Re: germination photoeffects
- To: propagation@mallorn.com
- Subject: Re: germination photoeffects
- From: g*@yage.net
- Date: Thu, 11 Nov 1999 08:05:05 -0500
I believe the light effect in Lactuca is strain dependent. A popular
experiment in high school science classes is to compare and contrast the
effects of light on Grand Rapids lettuce seeds and Simpson Black seeded
lettuce seeds. One has a light requirment for germination (in a specific
wave length band which I forget) the other has no light requirment at all.
Last time I checked, Gurney's carried both of these rather old, non-hybrid
lettuce strains. I'm sure that they are available elsewhere as well.
Love and light,
Glider --zone 5
At 10:19 AM 11/11/1999 +0100, you wrote:
>Thought this might be interesting:
>
>Under natural conditions fresh Lactuca (lettuce) seeds need light to
>germinate,
>however there are techniques you can use to overcome these photoeffects and
>germinate lettuce seeds in the dark - most commercial lettuce seed will
>have been dry stored (this helps - fresh lettuce seed will not germinate in
>the dark - dry storage removes the inhibition to germinate) a cold
>pretreatment of 3 months in the fridge is also encouraging. GA-3
>(gibberellic acid) treatment will often take away the need for light.
>
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