Imagine if after setting up your photometer you used a blowt

Imagine if, after setting up your photometer, you used a blowtorch to seal the end of the pipette trapping the air bubble inside. During transpiration, what would you expect to observe in the sealed pipette over time, and how could such a setup be used to estimate the actual tension and therefore water potential of the plant in MPa?

Solution

Water potential () = pressure potential (p) + solute potential (s)