Assuming the predawn xylem water potentials below come from the same plant growing in the east bay hills, which water potential measurement was likely to be taken from early spring, mid spring and mid summer? Explain your assignment of the water potentials to the different times of year and explain why water potential values might be similar during two times of the year.

-0.33 MPa, 

-0.3 MPa, 

-1.4 MPa