Results 1 to 4 of 4

Thread: Trees and Colour and Leaves

  1. #1 Trees and Colour and Leaves 
    Forum Bachelors Degree The P-manator's Avatar
    Join Date
    Nov 2005
    Well I don't know if this belongs here or in the earth sciences forum. Anyways my question is: why and how do the leaves on trees change colour? I am on my way to do some googling but I always like getting info from here.


    Fight for our environment and our habitat at
    Reply With Quote  


  3. #2  
    Forum Freshman
    Join Date
    Jun 2006
    I believe it has to do with sugars either being moved or being changed. I think moved, but I'm not positive (because once the leaf falls off the tree, if the sugar was still inside the leaf it would be wasted). The leaves could not survive the winter, so it would be a waste of energy to keep on the tree. They are therefore taken as an acceptable loss and things are salvaged to an extent.

    I think.


    Reply With Quote  

  4. #3  
    Forum Professor captaincaveman's Avatar
    Join Date
    Jul 2006
    When the light of days gets shorter in the autumn the leaves produce less and less chlorophyll(which is what gives leaves their colour)and this production eventually stops causing the leaves to change to their autumn colour(which is always there but masked by the brightness of the green).

    Then the cells at the base of the leaves grow and close up the leaves(leaving small amounts of sugars in there), they then finally drop

    I ANSWER TO NO-ONE - The wonders of athiesm

    that which does not kill us only postpones the inevitable
    Reply With Quote  

  5. #4  
    New Member
    Join Date
    Jan 2007
    I have read that trees drop leaves not only to survive winter but also to rid the tree of waste products
    Reply With Quote  

Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts