Tree leaf color change in fall

CFerrer007 cferrer007 at aol.com
Sun Feb 2 00:53:11 EST 1997


First, the chlorophyll desintegrates, therefore the other pigments (i.e.,
xanthophyll, anthocyanin, and carotene) become more and more apparent. The
leaves fall (probably) because of abscissic acid deposition which play a
role in senescence; the sealing effect of this product probably blocks the
phloem and xylem at the leaf axis, impeding the flow of water and minerals
towards the leaves.



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