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Transport in Plants - Coggle Diagram
Transport in Plants
Uptake of Water & Minerals
Osmosis (water into root hair cells)
Diffusion of ions
Active transport (ions against gradient)
Requires energy from respiration
Root hair cells: increase surface area
Transpiration & Water Movement
Evaporation from leaves (stomata)
Transpiration stream: replaces lost water
Cohesion and adhesion of water molecules
Measured by potometer (bubble potometer)
Practical & Experimental
Tracing xylem with dye (celery/carnation)
Aphid stylet technique to sample phloem sap
Potometer setup and use
Quantitative leaf mass loss / cobalt chloride paper
Leaf Adaptations to Reduce Water Loss
Thick waxy cuticle
Sunken stomata (trap humid air)
Rolled or needle-like leaves (reduce surface area)
Xerophyte adaptations (e.g., cacti)
Key Concepts
Water potential gradients
Sources and sinks
Role of respiration in active transport
Effects of environmental factors (humidity, wind, temp, light)
Transport Systems (Xylem & Phloem)
Xylem
Transports water & minerals upward
Cohesion-tension theory
Phloem
Transports sucrose & amino acids (translocation)
Source → Sink movement
Vascular bundles provide support