seed vitality after storage
Jonathan B. Marder
MARDER at agri.huji.ac.il
Thu Nov 2 01:29:28 EST 1995
In article <DHCHzM.Jxs at postoffice.ptd.net>,
mal at postoffice.ptd.net (Mary Anne Lynch) wrote:
>I have some questions about seed vitality and I am hoping this
>is the proper place to post them.
>Since seeds continue the respiration process before they are planted,
>they continuously lose their 'nutrient store' (albeit slowly) until
>one day they just will not have any more energy to germinate....
You may be interested to read up on "reconditioning" treatments. Seeds
are partially rehydrated (using a strong osmoticum, usually polyethylene
glycol), incubated for some days and then redried. When allowed to fully
rehydrate, the treated seeds germinate faster and more uniformly. I
believe that this is used as a commercial treatment.
I used this technique for my undergraduate project a
loooooooonnnnnnggggg time ago. In my case, I looked at rRNA fragmention
in "aged" tomato seeds and showed its repair during the reconditioning
treatment. I haven't followed the literature about seed treatment, but
here are some old references:-
Heydecker, W., Higgins, J. and Gulliver, R.L. (1973) Accelerated
germination by osmotic seed treatment. Nature 246, 42-44
Heydecker, W., Higgins, J. and Turner, Y.J. (1975) Invigorastion of
seeds? Seed Science and Technology, 3, 881-888.
Jonathan B. Marder '
Department of Agricultural Botany | Internet: MARDER at agri.huji.ac.il
The Hebrew University of Jerusalem | /\/
Faculty of Agriculture |/ \ Phone: (08 or +9728) 481918
P.O.Box 12, Rehovot 76100, ISRAEL / Fax: (08 or +9728) 467763
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