rtosol.•Thelowerratio,thelowermetabolismandtheslowergrowth,buthigherresistancebecauseprotoplasmisofnearertogel.自由水束缚水1.3Roleofwaterinplantlife(ponentofprotoplasmProtoplasminplantcontains70-90%water.(2)Substrate(底物)forplantmetabolismPhotosynthesis,anicsubstance.(3)Solventsforplantabsorptionandtransportation(4)Keepingplantinshape(extension)(5)Balanceplanttemperature1.3水的作用Section2Waterabsorptionbyplantcell2.1Osmoticabsorptionofwaterbyplantcell2.2Imbibingabsorptionofwaterbyplantcell2.3Metabolicabsorptionofwaterbyplantcell2.4Waterchannelproteinsoraquaporins2.细胞吸水2.1Osmoticabsorptionofwaterbyplantcell2.1.1Freeenergy,chemicalpotentialandwaterPotential2.1.2Osmosisandosmoticpotential2.1.3Plantcellisanosmoticsystem2.1.4Waterpotentialelementsoftheplantcell2.1.5Watermovementbetweencellsinplant2.1渗透吸水
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