Re: CULT: vernalization & Oz imports

Good point!  But also a possibility that the mechanism is the same.

While you're 'here', can you offer any insights (including wild guesses)
as to possible physiological mechanisms involved in the confusion of
imported southern hemisphere irises?  If it was just a matter of
triggering vernalization out of sequence, seems like they 'ought' to be
straightened out by the following spring, but from what others have
posted, it seems to sometimes take longer than a full 12 month cycle.

Linda Mann east Tennessee USA zone 7/8


> >Soo, the FRI gene is damaged in all these rebloomers, but may be damaged
>               >in different ways in different ones, plus it sounds like these mutations
>               >could theoretically appear in any seedling.
>
>               Whoa, hold on there!  We don't really know if lack of response to
>               vernalization is the reason rebloomers rebloom.  The article John pointed
>               us to was indeed interesting, but it is a far cry from Arabidopsis (a sort
>               of plant "lab rat") to reblooming irises.  As Don Spoon pointed out in a
>               recent article, there are a number of candidate explanations for rebloom in
>               bearded irises, and one, two, or all of them could be correct in individual
>               cases.  Mutant FRI might be the cause of rebloom in some, but not until the
>               DNA of rebloomers is checked with the appropriate probes will we know for
>               sure.
>
>
>               Bill Shear
>


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