Morning Glories

Ross Koning koning at ECSUC.CTSTATEU.EDU
Wed Jan 27 11:14:43 EST 1999


At 10:36 AM -0500 1/27/99, Elizabeth C. Larkin wrote:
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>Hi all,
>	I'm working on a project in which I'm trying to show that THT causes
>sterilization of the flowers of angiosperms. I'm working with B. rapa A.
>thaliana and a generic morning glory. Both the rapa and the Arabidopsis show
>signs of sterilization, but small (1-2 cm) buds of the glories look normal.
>I have considered the idea that it is meiosis which is effected and due to
>the age of the bud this may not have occurred yet, but I am unsure of the
>timing of events in this flower. Can anyone give me an idea of what's
>happening?
>
>Thanks,
>Lizze

Hi!

A graduate student of mine (Helen Guiragossian Kiss)
determined that meiosis in anthers of Ipomoea nil
(morning glory) cv. 'Scarlett O'Hara' is comlete
well in advance of flower opening.  If your buds are
1-2 cm in length, then the anther side is probably
close to finishing if not finished.  I do not know
the timing of meiosis in the ovule.  In some angiosperms
it is known that ovule meiosis lags behind anther
meiosis.

Many flowers develop fully with defective meiosis.
Triploid flowers, for example, are usually sterile
and yet have nice flowers (visually!).

I'm not sure what your acronym THT means...it isn't
one I'm used to, so maybe you could tell the group
more about it.

ross

________________________________________________________________
Ross Koning                 | koning at ecsu.ctstateu.edu
Biology Department          | http://koning.ecsu.ctstateu.edu/
Eastern CT State University | phone: 860-465-5327
Willimantic, CT 06226 USA   | fax: 860-465-4479
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