Re: Wild CA Grape Seeds
- To: ,
- Subject: Re: Wild CA Grape Seeds
- From: M* T*
- Date: Wed, 22 Dec 1999 00:05:58 -0500
Have not, intentionally, tried to germinate wild grape, one of the
rampant weeds of my woods - the birds do a more than adequate job for
me:)
However, according to 'Seeds of Woody Plants in north America' by
James A. and Cheryl G. Young, the seeds exhibit dormancy due to
absicissic acid concentrations in the embryo. They are referring to
Vitis labrusca L. - the Fox grape, native to the Eastern and
Midwestern parts of the US, but what they say for this species may
hold true for the native California grape.
They further say that seed can be stored for a couple of years at low
temperatures and requires prechilling - for this species from 120 to
220 days. Then they say this - I will quote the paragraph entirely:
" Germination: Many investigations have shown that gibberellin
enrichment enhances the germination of grape seeds. Pal et al.
(1976) suggested that gibberellin enrichment improved germination and
subsequent seedling growth of some grape cultivars. Patil and Patil
(1984) reported on detailed studies of the seed morphology of
numerous grape species. Ellis et al. (1983) developed the following
procedure for germination of grape seeds: (a) soak for 24 hours in
0.5M H2O2 (b) soak an additional 24 hours in 1000 ppm GA3 , and (c)
prechill for 21 days at 3 to 5C. The optimum temperature regime for
testing germination was 20/30C, and 25C was the best constant
temperature."
Hope this helps.
Marge Talt, zone 7 Maryland
mtalt@clark.net
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----------
> From: Duncan McAlpine <mcalpin1@yahoo.com>
> Date: Tuesday, December 21, 1999 8:47 AM
>
> Stephen,
> I am forwarding your query to the Propagation mailing
> list. Hopefully, you will receive some support on this
> issue.
>
> Duncan
>
> --- Hucklebird@aol.com wrote:
> > Hello Duncan McApline
> >
> > You have an interesting web site about germinating
> > seeds. Good job.
> >
> I have an interest in wild grapes. Here in California,
> we have a wild grape Vitis Californica. Some of the
> particular wild vines I know of grow near a creek.
> They seem to do well there and grown high into the
> trees. There is one vine, that could be 50 to 100
> years old, looking at the trunks, and it grows 50 to
> 60 feet into an oak tree. This particular vine is
> located a mile from the creek, however.
> >
> The other thing you should know is that I am not sure
> these vines are 100% wild grapes, Vitis Californica or
> otherwise. There is a lot of Vitis Vinifera in the
> area, and these could be the result genes mixing and
> going wild. The grapes that form on these vines do not
> form full clusters (like in the store) as there are a
> lot of stems, or spaces where grapes did not form.
> Nevertheless, one can find enough grapes to collect
> seeds like I did last November. I am concerned that
> the sparse clusters reflects a sterility issue, but if
> these vines are 100% Vitis, and not part of the 2n=40
> group, I should be okay.
> >
> Now I finally get to my questions. I tried germinating
> a small number of these seeds (keeping the bulk of
> them until I get the technique right), and had no
> luck. Perhaps my methods are not any good, or the
> seeds are indeed sterile. I tried it once in the house
> under a light(from reading your web site I probably
> needed cold treatment first), then I tried soaking a
> few seeds in water, then I put everything outdoors
> under a clear plastic cover to protect them from the
> cool nights. Well there is nothing yet, and it has
> been weeks. I have now gone to the next step, and put
> some seeds into the refrigerater, and I will keep
> them there for 30 days until I attempt sprouting a
> few again (I probably should have done this first, oh
> well).
> >
> My questions are simple. Do you know of any good ways
> to germinate these wild grape seeds? Can you point to
> any reference materials, or people that might be able
> to help? Maybe my new approach is what you would
> advise?
> >
> Thank you for your consideration.
> >
> > Sincerely, Stephen Smith
> >
> >
> >
>
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