Biology-Transpiration

Uses of transpiration

1.creating suction force in the stem to enable the roots to absorb water and mineral nutrients

2.for cooling

Transpiration

process of loss of water in the form of water vapour from the leaves and other aerial parts of the plant.

Cobalt Chloride is ——- when dry

blue

Cobalt Chloride is pink when_______

wet

Types of Transpiration

-CUTICULAR TRANSPIRATION

-LENTICULAR TRANSPIRATION

-STOMATAL TRANSPIRATION

increase in CO₂ over normal cause ________ to close and transpiration to _______

stomata, decrease.

What is cuticle?

waxy layer secreted by the epidermis on the two surfaces of the leave.

Adaptations of plant to reduce transpiration

1. Sunken stoma-Nerium

2. fewer stomata

3. narrow leaves-Nerium

4. reduced exposed surfaces

5. loss of leaves

6. thick cuticle-Banyan

Exudation

some plants may lose water or other fluids along with dissolved substances directly in liquid form and not as water vapour.

Exudate

the fluid given out in the process of exudation

Guttation occurs due to which pressure

Hydrostatic

What are the special pore bearing structures present in the margin to allow exudation.

Hydathodes

Bleeding only happens if the plant is ____

injured

Exudate of guttation contains

mainly water with some dissolved mineral salts

Exudate of bleeding contains

mainly plant sap and sugars

Example plant of guttation

Nasturtium, strawberry

Is transpiration excretory?

No. Because only water is lost.