How do you think water potential changes under high water stress?

"Water stress adversely impacts many aspects of the physiology of plants"

maby this is cause, Plant growth and productivity are adversely affected by water stress. Therefore, the development of plants with increased survivability and growth during water stress is a major objective in the breeding crops.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.