Plant hydraulics, soil-plant-atmosphere water movement, cohesion-tension description of xylem sap ascent, transpiration-linked water-potential gradients, and methods used to observe sap flow.
Visual lesson 09
Cohesion-tension & water potential
Trace how transpiration and water-potential gradients place xylem sap under tension and help move a continuous water column from roots toward leaves without describing the stem as an active pump.
Primary visual specification
Soil-root-stem-leaf water-potential gradient diagram
Create an academically accurate soil-root-stem-leaf water-potential gradient diagram for the Cohesion-tension & water potential lesson. Use neutral studio lighting or clean academic illustration conventions, realistic botanical proportions, readable labels where needed, no yellow cast, and no decorative elements that compete with the teaching objective.
- Asset type
- lesson visual
- System
- Stem & Vascular System
- Alt text prepared
- Yes
Knowledge check
PracticeCan you explain what the visual is showing?
What is the main physical idea behind cohesion-tension transport in xylem?
Track this lesson
Mark the lesson complete when you are comfortable with the visual, observations, and system context.
Evidence & further reading
Sources connected to this lesson
These references support specific biological, diagnostic, environmental, or process concepts used in this lesson. They are not a substitute for crop-specific testing or local regulatory guidance.Vascular-plant xylem transport capacity, drought-induced and wound-associated embolism, hydraulic conductivity loss, cavitation resistance, and the evidence limits surrounding embolism repair mechanisms.
Plant source–sink relationships, phloem loading and unloading, sieve-element transport, pressure-driven bulk flow, and regulatory context.
Cannabis leaf morphogenesis, phyllotaxy, plant architecture, reproductive transition, inflorescence development, trichome development, and senescence across a complete life cycle.
System context