CAN SUGAR TRAVEL Across the cell wal of roots into a pla

David C. Logan david.logan at
Wed Jan 22 06:10:58 EST 1997

faganjohns wrote:

>Yes.  In fact some plants are even parasitic.  They puncture the roots 
>or stems of other plants and take up sugars, water, and nutrients 
>streight through the roots.  Some of these plants even lack 
>chlorophyll, and cannot even make their own energy at all.

Root parasitic angiosperms take up water, minerals and sugars via a 
direct link with the host xylem - apparantly there is an unloading from 
host phloem to host xylem at the host/parasite interface. So in this 
case it is not through the root as a whole organ since the conection is 
within the vasculature tissue bypassing the outer tissues (epidermis, 
cortex, pericycle).

david.logan at

David C. Logan
Department of Plant Science
University of Oxford
South Parks Road


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