Not only trees but a wide variety of plants can have purple leaves. Other
plants can have a waxy coating on the leaves giving them a bluish color.
Still others have trichomes (hairs) on the leaves. All are ways of
controlling the amount of light reaching the photosynthetic tissues.
The pigments that make the leaves purple are not photosynthetic but are the
same as the floral pigments. All green plants make their energy by
photosynthesis. Even those with the chlorophyll masked by other colors.
Take a cross-section of the leaf and place it under a microscope to see
where the pigmented cells actually are located. You may be surprised by
what you see.
Be more than just curious, check it out for yourself!
Lee <Lee.Fletcher at ncl.ac.uk> wrote in article
<7mvf3i$99$1 at ucsnew1.ncl.ac.uk>...
> Just a quick question from a GCSE level biology person.....
>> If chloroplasts are what plants use to make their energy, and they are
> green, why do some trees have purple leaves and how do they make their
>> I'm just a little curious!
>> a reply to e-mail would be good.
>Lee.Fletcher at ncl.ac.uk> thank you