11-19-07 - BIO 311D TRANSPORT IN PLANTS 8:57:00 AM OVERVIEW...

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BIO 311D 19/11/2007 09:57:00 TRANSPORT IN PLANTS OVERVIEW: Proton pumps play a central roe in the transport across plant membrane Vacuolated plant cells have three major compartments Bulk flow functions in long-distance transport In flowering plants and other vascular plants, the flow of water and solutes  connects all cells of the plant Water absorbed from soil moves on up through xylem and into leaves By the energy-requiring process of translocation, sucrose and other organics are  distributed in the plant Proton pump—chemiosmosis cost: ATP energy functions by: H+ gradient results:  cation driven and co-transport of anions and neutral solute Cellular level and plant level cellular level o tonoplast o cell membrane plant level o apoplast o symplast Vascular cylinder tracheids and vessels in the xylem
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