Lecture 16, Ch. 36

Lecture 16, Ch. 36 - Lecture #16 Date _ $ Chapter 36~...

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Lecture #16 Date ______ Chapter 36~ Transport in Plants
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Transport Overview 1- uptake and loss of water and solutes by individual cells (root cells) 2- short-distance transport from cell to cell (sugar loading from leaves to phloem) 3- long-distance transport of sap within xylem and phloem in whole plant
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Whole Plant Transport 1- Roots absorb water and dissolved minerals from soil 2- Water and minerals are transported upward from roots to shoots as xylem sap 3- Transpiration, the loss of water from leaves, creates a force that pulls xylem sap upwards 4- Leaves exchange CO2 and O2 through stomata 5- Sugar is produced by photosynthesis in leaves 6- Sugar is transported as phloem sap to roots and other parts of plant 7- Roots exchange gases with air spaces of soil (supports cellular respiration in roots)
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Cellular Transport Water transport √ Osmosis; hyper-; hypo-; iso- Cell wall creates physical pressure: √water potential solutes decrease;
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Lecture 16, Ch. 36 - Lecture #16 Date _ $ Chapter 36~...

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