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.
System study map
Cohesion-tension & water potential
Soil-root-stem-leaf water-potential gradient diagramStart with the highlighted plant system as the anatomical context. Then compare the lesson observations with the evidence sources and knowledge check below so structure, process, and whole-plant consequences stay connected.- Plant system
- Stem & Vascular System
- Lesson focus
- Soil-root-stem-leaf water-potential gradient diagram
- Study mode
- Whole-plant context
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