Plant transport ppt

Recall ,[object Object],[object Object],[object Object],[object Object],[object Object]

Transport Mechanisms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Plant Transport Tissues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problem of Terrestrial Plants ,[object Object],[object Object],[object Object],Figure 36.1

Transport in Plants ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],Minerals H 2 O CO 2 O 2 CO 2 O 2 H 2 O Sugar Light Sugars are transported as phloem sap to roots and other parts of the plant. Figure 36.2 Sugars are produced by photosynthesis in the leaves. 5 6 Through stomata, leaves take in CO 2 and expel O 2 . The CO 2 provides carbon for photosynthesis. Some O 2 produced by photosynthesis is used in cellular respiration. 4 Transpiration, the loss of water from leaves (mostly through stomata), creates a force within leaves that pulls xylem sap upward. 3 Water and minerals are transported upward from roots to shoots as xylem sap. 2 Roots absorb water and dissolved minerals from the soil. 1 Roots exchange gases with the air spaces of soil, taking in O 2 and discharging CO 2 . In cellular respiration, O 2 supports the breakdown of sugars. 7

Effects of Differences in Water Potential ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Figure 36.6a 0.4 M sucrose solution: Initial flaccid cell: Plasmolyzed cell at osmotic equilibrium with its surroundings  P = 0  S = 0.7  P = 0  S = 0.9  P = 0  S = 0.9  =  0.9 MPa  = 0.7 MPa  =  0.9 MPa

[object Object],[object Object],Distilled water: Initial flaccid cell: Turgid cell at osmotic equilibrium with its surroundings  P = 0  S = 0.7  P = 0  S = 0  P = 0.7  S = 0.7 Figure 36.6b  = 0.7 MPa  = 0 MPa  = 0 MPa

How water moves ,[object Object],[object Object],[object Object]

Bulk Flow in Long-Distance Transport ,[object Object],[object Object]

The xylem sap and phloem sap ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Plant transport ppt

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