HYB: germination - after-ripening
- Subject: HYB: germination - after-ripening
- From: Linda Mann l*@volfirst.net
- Date: Tue, 05 Nov 2002 11:14:23 -0500
According to the information in the same chapter quoted in the
preceeding post, most seeds have <lower> germination potential while
fresh because embryo development (and a whole bunch of other stuff,
including <reduction> of some kinds of inhibitors) takes place in seeds
as they dry.
This says that it takes from 2 weeks to 4 months of <dry> storage for
seeds of most species to <ripen> to the stage where they can germinate
in experimental conditions, regardless of temperature, moisture etc.
For species studied (iris not mentioned), cold stratification <before>
this ripening takes place only delays germination.
Walter, the more I read, the more I think you are very wise to let ma
nature worry about what treatment to use on your TB seeds. Takes
longer, but ensures more complete germination.
One thing for sure - I won't plant plump fresh seeds again unless they
are from pink crosses.
--
Linda Mann east Tennessee USA zone 7/8
Tennessee Whooping Crane Walkathon:
<http://www.whoopingcranesovertn.org>
American Iris Society web site <http://www.irises.org>
iris-talk/Mallorn archives: <http://www.hort.net/lists/iris-talk/>
iris-photos/Mallorn archives: <http://www.hort.net/lists/iris-photos/>
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