How do trees know it's fall?

Marek Leda LEDA at fagus.ib.uj.edu.pl
Fri Oct 30 17:42:10 EST 1998


boldt at math.ucsb.edu wrote:
> 
> Hi,
> 
> how do trees know that it is time to drop the leaves? Is it an internal clock,
> the temperature, or the changing light?
> 
> Thanks,
>   Axel
> 
> --
>   Axel Boldt ** boldt at math.ucsb.edu ** math-www.uni-paderborn.de/~axel
> 
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starting signal for tree is long enaugh night

M. Leda



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