Effects of Wind on Stomatal Conductance and Transpiration Rate of Betula Papyrifera

1396 Words Jul 10th, 2015 6 Pages
Effects of wind on stomatal conductance and transpiration rate of Betula papyrifera

Previous studies on transpiration rates of plants suggest that in the presence of wind, transpiration rates can increase as the boundary layer is removed. A branch of Betula papyrifera was set up as a potometer and exposed to windy conditions and its transpiration rate measured, as well as the stomatal conductance. Although the average rate of transpiration and stomatal conductance were lower for the branch exposed to wind, there was no significant difference between the treatment and control group data sets to suggest a direct relationship.

Introduction Plants are able to take in water and move it throughout its systems through the process of
…show more content…
In order to observe how wind can affect the rate of water loss on Betula papyrifera, a branch of the deciduous birch tree was exposed to windy conditions and the water loss was measured in comparison to a branch kept at standard conditions. It was hypothesized that the branches exposed to wind would have greater transpiration rates than the control plants, as the loss of the boundary layer would result in faster loss of water.
Materials and methods Two healthy branches of Betula papyrifera were cut from the quad area between buildings 8 and 3, and were attached to rubber tubing beneath the water surface in a basin to prevent air bubbles from entering the xylem water stream. One branch was used as the potometer for the control group, and the other was used as the experimental group to be exposed to wind. Adjacent lab students responsible for the experimental group held a household hair dryer to the branch after the initial amount of water in the pipette was measured, and continued to measure the movement of water every five minutes for 60 minutes. The initial pipette measurements for the control group was also measured, as well as at every five minute intervals for the next hour. After the measurement was taken at five minutes, the stomatal conductance was measured

Related Documents