farishg at CC4.ADAMS.EDU farishg at CC4.ADAMS.EDU
Wed Oct 2 10:17:33 EST 1996

>From farishg Wed Oct  2 09:42:53 0600 1996 remote from cc4.adams.edu
Date: Wed, 2 Oct 1996 09:42:53 -0600 (MDT)
From: Guy Farish <farishg at cc4.adams.edu>
To: plant-ed at net.bio.net
Subject: Sap rise in spring
Message-ID: <Pine.SV4.3.91.961002093640.17818B-100000 at cc4.adams.edu>
MIME-Version: 1.0
Received: from cc4.adams.edu by cc4.adams.edu; Wed,  2 Oct 1996 09:42 MDT
Content-Type: TEXT/PLAIN; charset=US-ASCII
Content-Length: 781

I'm not a plant physiologist, so please excuse this question if it is 
naive.  When you are noting the sap rise in spring and wondering if root 
pressure is to blame, are you sure this is xylem sap and not phloem sap?  
I know one person mentioned tasting the sap to see if it is sweet, but is 
the sugar concentration high enough to taste?  Old friends of mine 
regularly tap sugar maples in the early spring, but I'm not sure that the 
sap is sweet until they boil it down into syrup (40 gallons of sap makes 
about 1 gallon of syrup).  I do know that this phloem sap is very dilute 
and will freeze on cold days in the collecting buckets.

Just a thought from a non-expert.

Guy Farish
Biology Department
Adams State College
Alamosa, CO 81102
(719) 587-7969 FAX (719) 587-7242

More information about the Plant-ed mailing list