Sucrose in phloem transport

John Hewitson john_hewitson at
Tue Nov 6 12:43:21 EST 2001

Dear Plant-edders,

Is there a good reason why plants transport sugars as SUCROSE in phloem?

What properties of sucrose make it most suitable as a substance for 
transport of sugar/energy?

Why would glucose or maltose not be suitable?

I have this belief that natural selection usually comes up with the most 
efficient solution to the problem.

John Hewitson

Dr. John Hewitson
Science and Plants for Schools (SAPS)
Homerton College
Cambridge CB2 2PH  UK
email: hom-saps at
Tel: +44 (0)1223 507168
Fax: +44 (0)1223 215004
web site:


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