LO 3.3 - Transpiration Flashcards
- Definition, function and plant parts involved - Environmental factors affecting transpiration; light intensity, relative humidity, air movements, temperature and soil water availability - Internal factors affecting transpiration; stomatal behaviour, stomatal number, size and distribution, presence of cuticle and presence of hairs
Info Graphic
Transpiration in plants is a vital part of the Hydrological cycle.
LO 3.3 - Transpiration
LO 3.3 - Transpiration
Question
What is transpiration?
LO 3.3 - Transpiration
Transpiration is the process whereby water is taken into a plant by the roots, transported up through the plant and released from the leaves as water vapour..
LO 3.3 - Transpiration
Question
What is the function of Transpiration?
LO 3.3 - Transpiration
- It brings water to the leaf cells to maintain turgor.
- It transports water to the leaves for photosynthesis.
- Assists in the transport of mineral salts (solutes) absorbed by the roots.
- It produces a cooling effect through evaporation.
LO 3.3 - Transpiration
Info Graphic
Plants and Water
LO 3.3 - Transpiration
LO 3.3 - Transpiration
Question
What tissue does water travel up through a plant in?
LO 3.3 - Transpiration
The Xylem tissue.
LO 3.3 - Transpiration
Question
Explain root hairs in relation to water uptake in roots.
LO 3.3 - Transpiration
- Water adsorbs from the soil particles onto the root hairs.
- Water diffuses from root hairs into root and makes it way to vacuole of epidermis.
- Water moves from cell to cell across the cortex.
- This pattern is repeated across the cortex until water enters xylem tissue.
LO 3.3 - Transpiration
Question
What are the main 3 Plant organs involved in Transpiration?
LO 3.3 - Transpiration
- Roots.
- Stem.
- Leaves.
LO 3.3 - Transpiration
Question
Transpiration process. What is it?
LO 3.3 - Transpiration
The transpiration process.
* Loss of water vapour from the leaves through the stomata. - PULL.
* Water is drawn up the xylem of the stem to replace that which is lost by transpiration.
* When the stomata are open water evaporates from the spongy mesophyll cells, the vapour diffuses through the air spaces and out into the air through the stomata.
LO 3.3 - Transpiration
Question
Transpiration process. What is it?
LO 3.3 - Transpiration
The transpiration process.
* Loss of water vapour from the leaves through the stomata. - PULL.
* Water is drawn up the xylem of the stem to replace that which is lost by transpiration.
* When the stomata are open water evaporates from the spongy mesophyll cells, the vapour diffuses through the air spaces and out into the air through the stomata.
LO 3.3 - Transpiration
