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