Study Question of Plant Physiology

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1、StudyQuestionofPlantPhysiologyChapterOneWatermetabolism1.Whatistheimportanceofthewaterpotentialconceptinplantphysiology?Whatarethecomponentsofwaterpotential?2.Listthreeuniquepropertiesofwaterthatmakeitsuchagoodmediumforcellularfunctioning,andexplainhoweachpro

2、pertyisusefultotheplant.3.Whatisturgorpressure(膨压)?Canplantcellshavenegativeturgorpressurevalues?Canyoucalculatetheturgorpressureofacellfromwaterpotentialandosmoticpotential(渗透势)values?4.Howdoeswatermoveacrossalargelyhydrophobic(疏水性的)plasmamembrane?5.Definean

3、dgiveanexampleofosmosisinaplantcell.Whatisthedrivingforceforosmosis（渗透作用）?6.Describethepathfollowedbywaterfromthesoil,throughtheplantandintotheatmosphere.Whereinthepatharetheimportantresistancestowatermovement?7.Whatisthedrivingforceforthemovementofwaterfromt

4、hesoiltothetopofatreeandintotheatmosphere?8.Describerootpressureandindicatewhenitmightoccur.9.Howdoesairrelativehumidityaffectthetranspirationrateofaleaf?Iftheairsurroundingatranspiringleafgetswarmer,howwillsuchachangeaffectthetranspirationrateoftheleaf?Chapt

5、erTwoMineralNutrition1.Whatdoesaplantneedtogrowfromseedandcompleteitslifecycle?Whatisthedifferencebetweentherequirementsofaplantandananimal?2.Whatisanessentialelement?Howmanyhavebeenidentified?Whatisthedifferencebetweenanessentialelementandabeneficialone?Prov

6、ideanexampleofeach.3.Whatisanutrientsolution?Whyisitmoreconvenienttouseliquidmedium,asopposedtosoil,togrowplantsinnutritionalstudies?Innutrientsolutions,nitrogencanbesuppliedasNH4+orNO3–.Whichonewoulduseinanutritionalstudy?4.Whatisthedifferencebetweenamacronu

7、trientandamicronutrient?Provideareasonfortheinabilityofplantphysiologiststoidentifymicronutrientsinearlynutritionalstudies.Whyisitdifficulttosupplyironinnutrientsolutions?Whatisthebestwaytoovercomethisdifficulty?5.Whatisamineraldeficiency?Howcanamineraldefici

8、encyberecognized?6.HowcantheoperationoftheplasmamembraneH+-ATPaseaffectthediffusionofK+throughmembranechannels7.Inthetransportofanionfromthesoilsolutiontothexylem,whatistheminimumnumberof