Why are some new leaves Red?

Discussion in 'Plants: Science and Cultivation' started by mcroteau1969, Jan 3, 2010.

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  1. mcroteau1969

    mcroteau1969 Active Member 10 Years

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    OK, so I know there are plant hormones responsible for colour/pigment and various related functions in cells and organelles but ...

    An example might be Photinia, or even certain Roses ... I'm sure we all know how they become red but why?

    Is there an evolutionary reason for new leaves emerging from buds in a red colour?

    Do they taste different, does it detract insects does it relate to light absorbtion or reflection ... why?
     
  2. togata57

    togata57 Contributor 10 Years

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    Some folks believe the following theories:
    that red color may serve a protective function, shielding the new leaves from UV rays;
    may assist photosynthesis;
    warns animals against eating the new leaves.
     
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