transport processes in plants€¦ · the movement of water & minerals transpiration definition...
TRANSCRIPT
Transport Processes in Plants
Two important transports in plants
Introduction
The Movement of Water & Minerals
Transpirationdefinitiondifference between plants & animalsreason for transpiration
The Movement of Water & Minerals
Water uptakesoil waterroot pressureguttationonly accounts for 10 m
The Movement of Water & Minerals
Cohesion-Tension Theory
mechanism
reason for name
http://highered.mcgraw-hill.com/sites/9834092339/student_view0/chapter38/animation_-_water_uptake.html
Factors Influencing Transpiration
Name 4
loses most water
Stomatal MovementTurgidity
effect on guard cells
reasons
water movement and solute
K+ as critical solute
H20, Cl-, H+
Stomatal Movement
Energy sourcesATP production ORchemiosmosis
Stomatal MovementOther factors
Availability of waterAbscic acidCO2 concentrationtemperature
Stomatal Movement
Lightopen - day; closed - night
Explanations
Stomatal Movement
Crassulacean Acid Metabolism
The Uptake of Minerals
minerals (definition)how are they taken uprole of endodermisactive transport & mineral uptake
The Movement of Sugar
Translocationdifficult to studysieve-tube sap containsmovement of sap (timing)
The Pressure-Flow Hypothesis
Movement by translocation is source-to-sink patternSourceSink
Pressure-flow hypothesis accounts for translocation by a source-to-sink pattern
Solutes move in solutions...
Sugars move from leaf...
At source
Sugar
Water
Movements in Sieve Tubes
Movements in Sieve Tubes
At sinks
Water & sugar
Fate of sugar
Fate of water
Movements in Sieve Tubes
Movement in sieve tubesRole of mitochondriaPassivehttp://highered.mcgraw-hill.com/sites/9834092339/student_view0/chapter38/animation_-_phloem_loading.html
Factors Influencing Plant Nutrition
Mineral uptake by roots depends on
availabilitysymbiotic relationships
Components of Soil
Mineral componentsdetermined by
Soil particles size
Availability of Minerals
calciumiron
The Role of SymbiosisMycorrhizae
whatrole of funginitrogen availability - asrole of nitrogen
Nitrogen Fixation
organismsexampleimportance