translocation and transpiration

• Translocation is the movement of dissolved substances from one part to another within plants.
• xylem is made yp with dead cells with a strengthning material called lingin. They also have a hollow tube inside
• xylem helps move minerals and water up to the roots of the plant .
• transpiration first starts when water ewnters the roots via osmosis. then water goes up to the stem to then the leaves . Water then evaporates from the leaves to the surroundings
• affects of transpiration :Light intensity-the brighter it is the greater trasnpiration is . When it is dark the stomata closes as there is no light for photosynethsis so they don't need co2 to enter. Very little water can escape
• affects of trasnpiration : temperature - high temperature means higher rate of transpiration as water evaporates more quickly. When warm particles have more energy to evaporate and diffuse out the stomata
• affects of trasnpiration : surface area - larger surface area = more stomata = more water lost by transpiration
• affects of trasnpiration : humidity - low humidity means that the air has less water vapour which makes it easier for water molecules to leave the leaf through diffusion. High humidity means that the air already contains lots of water vapour making it harder for water to leave the leaf by diffusion. So this decreases the rate of transpiration