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

David C. Logan david.logan at plant-sciences.oxford.ac.uk
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).

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david.logan at plants.ox.ac.uk

David C. Logan
Department of Plant Science
University of Oxford
South Parks Road
Oxford
OX1 3RB

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