IndividualsWater RelationsAirLowwaterpotentialPlantMedium waterpotentialSoilHighwaterpotentialFIGURE5.5Agradientofwarerpotential
Individuals Water Relations
IndividualsWater Relations100Dryair山=-1ooDry air has thelowestwaterpotential.Plant waterpotentials()Water potential4.0atthe top of theplantis lower(more negative).2.23-1.22Plant waterpotentials ()0.9Water potentialof the soil higher-0.6(ess negative).Soil waterpotential ()Water potential ofpure water.Aquantified gradient ofwater potential (datafrom WiebeFIGURE5.6etal.1970)
Individuals Water Relations