for transporting water and minerals in xylem vessels 101 Transpiration in

For transporting water and minerals in xylem vessels

This preview shows page 33 - 49 out of 203 pages.

for transporting water and minerals in xylem vessels 10.1 Transpiration in plants 1 Transpiration creates transpiration pull
Image of page 33
10 Transpiration, transport and support in plants 34 Significance of transpiration C 10.1 Transpiration in plants helps absorption of water by roots 2 Transpiration creates transpiration pull
Image of page 34
10 Transpiration, transport and support in plants 35 cooling effect Significance of transpiration C 10.1 Transpiration in plants 3 Evaporation of water removes heat from the leaves
Image of page 35
10 Transpiration, transport and support in plants Common misconception Common misconception Water moves out of the leaf by osmosis down the water potential gradient. 36 Water vapour moves out of the leaf by diffusion down the concentration gradient . Water losses to the atmosphere by evaporation. Water losses to the atmosphere by transpiration .
Image of page 36
10 Transpiration, transport and support in plants 37 How are stomata distributed on leaves? D 10.1 Transpiration in plants different plants have different numbers and distribution of stomata on leaves adaptations to different environments
Image of page 37
10 Transpiration, transport and support in plants 38 Distribution of stomata on leaves Terrestrial dicotyledonous plants 10.1 Transpiration in plants Tomato Stomatal density (number per cm 2 ) Upper epidermis Lower epidermis 1200 13 100 lower density
Image of page 38
10 Transpiration, transport and support in plants 39 10.1 Transpiration in plants Distribution of stomata on leaves Submerged plants Hydrilla Stomatal density (number per cm 2 ) Upper epidermis Lower epidermis 0 0 no stomata
Image of page 39
10 Transpiration, transport and support in plants 40 10.1 Transpiration in plants Distribution of stomata on leaves Submerged plants Hydrilla no cuticle gases, water and minerals diffuse directly through all surfaces
Image of page 40
10 Transpiration, transport and support in plants 41 10.1 Transpiration in plants Stomatal density (number per cm 2 ) Upper epidermis Lower epidermis Water lily 9500 0 no stomata Distribution of stomata on leaves Floating plants
Image of page 41
10 Transpiration, transport and support in plants 42 10.1 Transpiration in plants Water lily no cuticle lower epidermis Distribution of stomata on leaves Floating plants
Image of page 42
10 Transpiration, transport and support in plants 43 10.1 Transpiration in plants Water lily gas exchange through stomata water and minerals diffuse directly lower epidermis upper epidermis Distribution of stomata on leaves Floating plants
Image of page 43
10 Transpiration, transport and support in plants 44 Structural adaptations of leaves to prevent excessive loss of water through transpiration E 10.1 Transpiration in plants terrestrial plant
Image of page 44
10 Transpiration, transport and support in plants 45 10.1 Transpiration in plants cuticle impermeable to water reduce water loss 1 Covered with cuticle
Image of page 45
10 Transpiration, transport and support in plants 46 10.1 Transpiration in plants sun 2 Fewer stomata on upper epidermis dicotyledonous plant leaf held horizontally
Image of page 46
10 Transpiration, transport and support in plants 47 10.1 Transpiration in plants few or no stomata sun temperature reduce water loss 2 Fewer stomata on upper epidermis
Image of page 47
10
Image of page 48
Image of page 49

You've reached the end of your free preview.

Want to read all 203 pages?

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture