Transpiration

• What is transpiration?

  Evaporation of water from plant leaves
• What factors affect the rate of transpiration?

  Temperature, humidity, wind, and light intensity
• What are the roles of stomata in plants?

  Gas exchange and water loss
• Where does photosynthesis take place in the leaf?

  In the palisade mesophyll
• What does xylem tissue do?

  Transports water and dissolved minerals
• How does water enter the roots of a plant?

  Through root hair cells
• What initiates the process of transpiration?

  Evaporation of water from leaf cells
• What is the transpiration stream?

  The movement of water from roots to leaves
• Why is transpiration important for plants?

  It brings water for photosynthesis and cools leaves
• How does temperature affect the rate of transpiration?

  Higher temperatures increase the rate of transpiration
• How does humidity affect transpiration?

  Lower humidity increases the rate of transpiration
• What effect does wind have on transpiration?

  Wind increases the rate of transpiration
• How does light intensity affect transpiration?

  Higher light intensity increases the rate of transpiration
• What happens to stomata during high light intensity?

  Stomata open to allow gas exchange
• What do guard cells do in relation to stomata?

  They control the opening and closing of stomata
• What happens to guard cells under high light intensity?

  They swell and change shape to open stomata
• What occurs when a plant closes its stomata under hot conditions?

  Water loss is reduced, but photosynthesis decreases
• What is a key factor that affects transpiration in plants?

  Light intensity
• What is the relationship between transpiration and photosynthesis?

  Transpiration provides water needed for photosynthesis