IndividualsWater RelationsWater Movement in AquaticEnvironments
Individuals Water Relations ➢ Water Movement in Aquatic Environments
IndividualsWater RelationsRelative concentration of water.Solutes in water.Diffusion (Osmosis):: water move down itsconcentration gradient. Osmoticpressure·Isosmotic , Hypoosmotic, Hyperosmotic
Individuals Water Relations • Relative concentration of water • Solutes in water • Diffusion ( Osmosis): water move down its concentration gradient. Osmotic pressure • Isosmotic , Hypoosmotic, Hyperosmotic
IndivdualsWater RelationsCompared to the environment,aInan tsosmoticaguatiehyperosmoticaquaticorganismorganisminternalhasalowerinternalconcentrationconcentrationsofwaterSalts diffuse out of aofwaterand a higherinternaland salt equal theirhyperosmotic organism ataSalts and waterdiffuseconcentration of saltsconcentrationsinthehigher rate. while wateratapproximatelyequalenvironment.diffuses in at a higher rateratesintoandoutofanSaltsWaterisosmoticorganismSaltsWaterIsosmoticHyperosmoticCompuredto theenvironment.ahypoosmoticaquatic organismhasahigherinternal concentration ofwaterSalts diffuseintoaand a-lowerintemalconcentrationofhypoosmoticorganismatasalts.higherrate,whilewaterdiffuses outat ahigher rateSaltsWaterHypoosmoticFIGURE5.4Isosmotie,hyperosmoticand hypoosmoticaquatieorganisns
Individuals Water Relations
IndividualsWater Relations Water Movement BetweenSoils and Plants
Individuals Water Relations ➢ Water Movement Between Soils and Plants
IndividualsWater Relationsdeficit Vapor pressure: Water potentialY+f+f=matricplantsolutespressure
Individuals Water Relations • Vapor pressure deficit • Water potential • Ψplant= Ψsolutes + Ψ matric + Ψpressure