HYB: germination - complexities - phooey
- Subject: HYB: germination - complexities - phooey
- From: Linda Mann l*@volfirst.net
- Date: Tue, 05 Nov 2002 11:04:34 -0500
............. from Koller, Environmental control of seed germination,
Chapter 1, Seed Biology, ed. T.T. Kozlowski ...............
p.91
V. Prematuring conditions
One of the most disconcerting facts...is the high degree of
physiological variability among seeds.....it is clear that there are
other factors, in addition to the inherent genetic variability [within
species - he isn't even talking about complicated genetic messes like
our wierd modern TBs], that contribute to ..[this variability]. Some of
the variation results from unintentional differences in storage
conditions, some from changes which occur during storage, even under
strictly controlled conditions and some fromt he degree of maturity at
which the seeds were harvested, even though the date of harvest may be
the same. Even when all these sources of variation are accounted for,
there remains a residual variability which by elimination has been
attributed to the year-to-year variations in climate during seed
formation and ripening, and to the more permanent differences in climate
between different habitats where the seeds had been produced.
........................
aarrgghhh!! So in other words, what works well for one of us <may> not
work well (or even at all!) for anybody else in a different climate,
even when working with the same cultivars!
Fascinating reading, but this is a review of all kinds of germination
inhibitors, enhancers, etc on many species and impossible to know which
might apply to irises.
--
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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