Chapter 36 Transport in Plants p. 748

An overview of transport mechanisms in plants

·        3 levels of transport

 

 

 

 

 

·        Figure 36.1 p. 749

 

 

Transport at the cellular level depends in the selective permeability of membranes p. 749

·        This brief section is a review of Chapter 8..worth reading

 

 

 

Proton Pumps play a central role in transport across plant membranes p. 749

·        Proton pump (description and purpose)

·        Membrane potential

 

·        Cotransport

 

·        Chemiosmosis

 

·        Figure 36.2 p. 750 solute transport in plant cells

Differences in water potential drive water transport in plant cells p. 750

·        Osmosis

 

 

·        Impact cell wall has on osmosis

 

 

·        2 factors that impact osmosis in plant cells

 

 

 

 

·        Water potential

 

 

 

 

 

 

 

 

 

 

 

·        Megapascals

 

·        How does solute concentration and pressure affect water potential?

·        Figure 36.3 p. 751

·        Tension

·        Figure 36.4 p. 752

·        Flaccid

·        Plasmolyze

·        Turgor pressure

Aquaporins affect the rate of water transport across membranes p. 752

·        What are aquaporins? Role?

 

 

 

Bulk Flow functions in long-distance transport p. 754

·        Bulk flow

 

 

 

Absorption of water and minerals by roots p. 754

Roots hairs, mycorrhizae, and a large surface area of cortical cells enhance water and mineral absorption p. 754

·        Figure 36.7 p. 755

·        Root tips

·        Root hairs

·        Mycorrhizae

 

Transport of Xylem Sap p. 756

·        Direction of xylem sap flow

·        Transpiration

·        When is transpiration low? High?

 

 

·        Root pressure

·        guttation

·        What role does cohesion and adhesion play?

·        Figure 36.11 p. 758

 

The control of transpiration p. 759

·        Figure 36.12 p. 759

·        How do guard cells work?

 

 

 

 

·        Figure 36.13 p. 760

Translocation of Phloem sap p. 762

·        translocation

·        What is phloem sap? How is different from xylem sap?

·        Sugar source

·        Sugar sink