Re: [OGD] Florigen flowering hormone?

[Thomas Hillson]

There is no Florigen, the flowering process from studies done in the 
60's and 70's was show to be a very complex process involving 
multiple processes in the plant. No single hormone was ever found to 
control the process, rather it involved multiple systems reacting to 
multiple stimuli to bring on flowering. The last I looked at the 
research there was no definitive answer to the question of what 
stimulates or prevents plants from flowering. Rather there are lots 
of different plants that react to different stimuli multiple ways 
that all produce flowers. Just about every stimuli that influences 
the growth of plants can cause or prevent flowering in some plant, 
long nights, short nights, heat, cold, age, various plant growth 
regulators (phytohormones), etc have all been shown to have 
influences in one plant or another.

If you want to do some reading go out to one of the search engines 
and enter inducing flowering, you will find several thousand pages. 
There are also some good references you can find for basic books on 
plant physiology that might answer your question faster.

I spent 20 years as a plant physiologist and gave up test tubes for 
computers about 18 years ago.

--Tom
/----------------------------------------------------------------------------------------
| Tom Hillson            Computer Services Manager
|(515) 294-1543      College of Agriculture
|                                  Iowa State University
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|"The only thing I have too much of is too little time"
At 5:14 PM +0000 7/14/04, K Barrett wrote:
Has the search for the flowering hormone Florigen been totally 
discredited?  In looking around the web it didn't appear that much 
credence was given to it anymore.

K Barrett
N CALIF, USA
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