In this experiment, we examined cavitation in Quercus berberidifolia plants. We hypothesized that as the amount of water stress increases, then the pressure to cause embolism will decrease. We thought this because as a plant loses more water, the more air bubbles will form within the plant and therefore the pressure to cause this will decrease. We tested this hypothesis by comparing dry Quercus berberidifolia to more hydrated Quercus berberidifolia in Tapia Park, near Malibu, California. We measured and compared these plants by the use of the Scholander Pressure chamber and a parometer. In the end, we discovered that our hypothesis was correct. Our data showed us that less hydrated plants that had more water stress had a lower atmospheric pressure than the more hydrated plants.
Bryant, Mia; Dario, Hannah; and Kline, Cameron, "Difference in Water Status between Oak Trees (Quercus berberidifolia) with Brown and Green Leaves During Severe Drought" (2013). Pepperdine University, All Undergraduate Student Research. Paper 127.