pbs Digest, Vol 57, Issue 16

Max Withers maxwithers@gmail.com
Mon, 15 Oct 2007 10:28:38 PDT
Diane's explanation for Arnold's Arums is inspired. The trigger here 
must simply be the passage of time (i.e., boredom). Without pretending 
to understand biochemistry, it is plausible to image a growth inhibitor 
that could be overcome by, say, day-length or precipitation events, but 
will eventually wear off even without external stimuli.

> No light, no temperature differences?  Obviously boredom was the  
> trigger.
> Diane Whitehead

> From: Arnold Trachtenberg <arnold@nj.rr.com>
> Subject: [pbs] What promotes blooming or growth ?
> I have to add an additional thought to the thread of flower initiation.  
> I have five or  six pots of various Arum species on the floor of my 
> basement.   I would say that the temperature varies little during the 
> year and there is no light.  I turn off the HID lights that  I use  
> during the winter for some South African species.  Well, I had a look 
> this evening and many of the Arum are pushing up a spike of growth.  So 
> what was the trigger in this case.
> Arnold
> New Jersey

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