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Transport in plants

Transport in plants. Transport in plants. Transport in plants. Transport in plants. Transport in plants. Solute transport in plant cells. Solute transport in plant cells. Water potential and water movement. y = water potential (MPa megapascals) 1MPa = 10atm y = y p + y s.

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Transport in plants

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  1. Transport in plants

  2. Transport in plants

  3. Transport in plants

  4. Transport in plants

  5. Transport in plants

  6. Solute transport in plant cells

  7. Solute transport in plant cells

  8. Water potential and water movement y = water potential (MPa megapascals) 1MPa = 10atm y = yp + ys

  9. Water relations of plant cells Cell y > Environment y Cell y < Environment y

  10. Tomato plant regains its turgor

  11. Lateral or Short Distance routes for transport

  12. Lateral or Short Distance routes for transport

  13. Lateral transport of minerals and water in roots

  14. Guttation: result of nocturnal building of root pressure (ys)(pushing of Xylem sap)

  15. Xylem sap ascent: the Transpiration-Cohesion-Tension mechanism

  16. Ascent of water in a tree - role of hydrogen bonding

  17. Maple treeTranspiration: 200 liters/day 75 cm/min

  18. Leaf Stoma: Photosynthesis –Transpiration compromise • 90% water loss through Stoma • Transpiration to Photosynthesis ratio • 600:1 (C3) - 300:1 (C4)

  19. Stomata on the underside of a leaf

  20. Transpiration larger than Xylem delivery: loss of turgor

  21. The mechanism of stomatal opening and closing Daytime – Open Nightime - Closed

  22. The mechanism of stomatal opening and closing Light triggered accumulation K+ in guard cells CO2 Depletion in leaf airspaces Internal clock in guard cell: Circadian Rythm

  23. Phloem sap transport: Bidirectional flow between sugar sources and sink

  24. Phloem transport: From source to sink Pressure Flow: High osmotic pressure near source which “pushes” water towards sink

  25. Aphids and Phloem Research

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