How does sap get up from the roots to the buds of a tree in the Spring?
Is it via phloem or xylem? What is the source of the "pressure"?
I have searched in plant physio books and found nothing.
Could this "flow" be apoplastic? Maple syrup enthusiasts want
to know! - NH
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---Nancy Harrison, SRJC Life Sciences, Santa Rosa CA 95401
http://www.sonic.net/~vulpia/index.html (with link to CNPS in Sonoma
County)
