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PLANTAE

PLANTAE. Terrestrial Adaptations. Apical meristems enable primary (vertical) growth. Terrestrial Adaptations. Terrestrial Adaptations. Vascular Tissue. Roots. Absorption Anchorage/Support Storage. Stems. Elevation Vegetative Reproductive. Plant Tissues. Dermal Vascular Ground.

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PLANTAE

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  1. PLANTAE

  2. Terrestrial Adaptations Apical meristems enable primary (vertical) growth

  3. Terrestrial Adaptations

  4. Terrestrial Adaptations Vascular Tissue

  5. Roots Absorption Anchorage/Support Storage

  6. Stems • Elevation • Vegetative • Reproductive

  7. Plant Tissues Dermal Vascular Ground

  8. Plant Tissues – Leaf Dermal Vascular Ground

  9. Alternation of Generations Both are multicellular Both are multicellular

  10. Meristems

  11. Secondary Stem Growth

  12. Secondary Stem Growth CORK CORK CORK CORK CAMBIUM CORK PHLOEM VASCULAR CAMBIUM XYLEM

  13. OLDEST PHLOEM VASCULAR CAMBIUM VASCULAR CAMBIUM OLDEST XYLEM PHLOEM XYLEM NEWEST PHLOEM NEWEST XYLEM

  14. Secondary Stem Growth

  15. Secondary Stem Growth

  16. Secondary Stem Growth

  17. Transport in Plants Absorption by the roots Transport of xylem sap Transpiration Translocation of phloem sap

  18. Transport Routes Endodermis Casparian Strip Apoplastic Symplastic

  19. Transport of Xylem Sap • Transpiration • Evaporation of water through stomata • Creates tension in xylem cells

  20. Transport of Xylem Sap Transpiration Adhesion Cohesion Osmotic Pressure

  21. Translocation of Phloem Sap Source  Sink • Spring Roots  Meristems • Summer Leaves  Flowers, fruits Roots

  22. Gibberellins • Stimulate • cell elongation • fruit development

  23. Auxins and Cytokinins • Primary shoot growth • Lateral root branching • Seedless fruits • Fruit development without fertilization • Lateral shoot branching • Primary root growth

  24. Apical Dominance auxins inhibit axillary buds cytokinins promote axillary buds

  25. Abscisic Acid • Inhibits germination • May be broken down by water, heat, or cold

  26. Ethylene • Triple response to mechanical stress • Slower elongation • Thickening • Horizontal curvature

  27. Ethylene • Apoptosis • Programmed cell death • Leaf abscission • Fruit ripening • Cellulose/starch hydrolysis

  28. Rapid Leaf Movements Active transport of ions into cells Water follows by osmosis

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