North American Fruit Explorers mailing list at ibiblio

[mIEKAL aND <qazingulaza@gmail.com>]

Interesting thread.  I have about 50 seedling pawpaws in pots in shade
under a few trees.  All but two of them have healthy green leaves and
are actively growing but two of them have leaves that are getting
increasingly yellow.  I'm pretty sure this isn't from sun, and am
guessing phosphorus deficiency or perhaps an issue with poor drainage
in those particular containers.

~mIEKAL



On Thu, Jun 21, 2012 at 1:02 PM,  <david.maxwell@dal.ca> wrote:
> It is actually not specific to paw-paws.  Plants in shade need to make more 
> chlorophyll in
> order to make more food for growth.  The increased chlorophyll is dark 
> green.  Plants flooded
> with light need - and make - less chlorophyll to satisfy their needs -> 
> paler leaves.  (You are
> reasoning in anthropomorphic terms - humans get darker in the sun.  But 
> humans don't
> photosynthesize).
>
>> Does anyone have any ideas on why the leaves of a tree would become
>> paler in the sun than they are in the shade?
>>
>>
>> Jay
>>
>
>
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