Transpiration

Question 1

What is transpiration?

Answer 1

• evap. of water

- from the surf. of plant

Question 2

Explain the transpiration stream

Answer 2

• water molec. attract. to each other
• so, when WV leaves
• molecules pulled up XYLEM

Question 3

What are the factors that affect the rate of transpiration?

Answer 3

• LI
• Temp.
• WS
• Humid.

Question 4

Explain the effect of an increase in light intensity on the rate of transpiration?

Answer 4

• As LI increase
• Rate of Photosynth. increases
• so more open stom. for GE
• increasing the rate of transpiration

Question 5

Explain the effect of an increase in temperature on the rate of transpiration?

Answer 5

• Increases rate of evap.
• rate of photosynth. increases
  - more stom. open for GE
• increasing the rate of transpiration

Question 6

Explain the effect of increased wind on the rate of transpiration?

Answer 6

• As wind increases
• More air moved away from leaf
• Conc. of surroundings decreases
• STEEPER conc. gradient
• increasing rate of transpiration

Question 7

Explain the effect of increased humidity on the rate of transpiration?

Answer 7

• if surrounding’s humidity is high
• reduced conc. gradient
• reducing rate of transpiration