Re: [APD] Re: Closing up for the night - or Nyctinasty

["S. Hieber" <shieber at yahoo_com>]

Probably the *least* anthropomorphic exlanation will come
closest to explaining the actual mechanisms.  hmmm

Scott H.
--- Clint Brearley <clint_brearley at telstra_com> wrote:
> 
> Charley Bay wrote:
> > As far as the biochemical change in plants driving
> > nictinasty, yes, several bioactive substances have
> > been identified that regulate leaf movement, and some
> 
> What about this hypothesis. Perhaps during the day, stem
> plants stretch out their leaves so that they receive as
> much light as possible for photosynthesis. To do this the
> plants may need to actively transport biochemicals to
> certain areas of the leaf in order to make them move
> (which uses energy, but the trade-off is that much more
> energy is gained in return via photosynthesis). Then when
> either the plants have gained enough energy or when the
> lights go out, which ever occurs first, the plants may
> stop transporting the biochemicals causing the leafs to
> close up, which is possibly just a lower energy position.
> This is only speculation, but it kinda makes some sense
> (doesn't it?)
> 
> Clint Brearley
> Melbourne, Australia
> 
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