Ch 36 - Ch. 36 Transport in Plants Understand how proton...

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Ch. 36 Transport in Plants Understand how proton pumps and solute co-transport are involved in moving ions and solutes across plant cell membrane Understand how solute concentration and back pressure determine water potential Understand the basic mechanism for water flow upwards, and sugar flow downwards in plants Plant Transport 0. Water is transported from roots to leaves, driven by transpiration 1. Sugars are transported from leaves to roots (downward thru the plant) 2. Selective permeability of cm, ion channels, and cotransport mechanisms important 0. Potassium channels allow K + to cross cm 1. Transport proteins in membrane allow other solutes to be actively transported Fig. 36.2 Proton Pump 3. ATP provides energy to pump H + out, creating negative membrane potential 4. Cations Like K + ) flow into cell because of potential 5. Cotransport of anions and neutral solutes back in along with H + Figure 36.4 Figure 36.5 Water potential and water movement: a mechanical model Figure 36.6
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Ch 36 - Ch. 36 Transport in Plants Understand how proton...

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