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Stress Ecology

Stress Ecology. WS 06/07 Ralf Schulz. Combined chilling and (high) light stress - Tropical bean. 6 h at 6 °C 2000 µmol m -2 s -1 70 µmol m -2 s -1. 3 h at 5.5 °C varying light int. constant 2000 µmol m -2 s -1. Factors and resources - Temperature.

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Stress Ecology

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  1. Stress Ecology WS 06/07 Ralf Schulz

  2. Combined chilling and (high) light stress - Tropical bean 6 h at 6 °C 2000 µmol m-2 s-1 70 µmol m-2 s-1 3 h at 5.5 °C varying light int. constant 2000 µmol m-2 s-1 Factors and resources - Temperature Schulze et al 2002

  3. Different importance/effects of heavy metals on plants Factors and resources - Heavy metals Schulze et al 2002

  4. Factors and ressources • Physico-chemical factors • Temperature, pH, Salinity, Mechanical stress, Toxic compounds • Resource-related aspects • Light, Nutrients (C, N, P), Water, Oxygen, Organisms (as food), Space • Ecology-related aspects • Predation, Density (Competition), Parasitism

  5. Lecture content • Introduction • Overview  • Definition of stress (ecology)  • Factors and resources (and associated reactions) • Factors  • Resources • More complex reactions • Life cycle strategies (Ecological traits) • Predation and disturbance in communities • Abundance (and ist variation) • Anthropogenic impact on abundance (harvesting and killing) • Seminar on stress ecology

  6. Factors and resources (and associated reactions) Resources - Oxygen deficiency

  7. Resources - Oxygen deficiency Factors and resources - Oxygen deficiency Schulze et al 2002

  8. Redox potential of a loamy soil Factors and resources - Oxygen deficiency Schulze et al 2002

  9. Sequence of soil-bound redox reactions Factors and resources - Oxygen deficiency Schulze et al 2002

  10. Root growth and redox potential - Spartania patens Factors and resources - Oxygen deficiency Schulze et al 2002

  11. Germination of seeds in air or nitrogen Lettuce Rice Factors and resources - Oxygen deficiency Schulze et al 2002

  12. Lipid degradation in rhizome tissue - Iris vs. Acorus Factors and resources - Oxygen deficiency Schulze et al 2002

  13. Anatomical-morphological reactions to hypoxia - Rumex R. acetoselia Flooding-sensitive R. palustris Flooding-tolerant Factors and resources - Oxygen deficiency Schulze et al 2002

  14. Factors and resources (and associated reactions) Resources - Water deficiency

  15. Dessication of plant cell upon exposure to air Factors and resources - Water deficiency Schulze et al 2002

  16. Water storage in leaves of Peperomia Factors and resources - Water deficiency Schulze et al 2002

  17. Cellular reaction to drought: ABA-mediated response Factors and resources - Water deficiency Schulze et al 2002

  18. Responses of plant cells to drought Factors and resources - Water deficiency Schulze et al 2002

  19. ABA-independent gene activation by drought Factors and resources - Water deficiency Schulze et al 2002

  20. Response to drought - Accumulation of osmolytes Factors and resources - Water deficiency Schulze et al 2002

  21. Accumulation of osmolytes - GM tobacco Factors and resources - Water deficiency Schulze et al 2002

  22. CAM (Crassulacean Acid Metabolism) Factors and resources - Water deficiency Schulze et al 2002

  23. Efficiencies of plants with different metabolisms Factors and resources - Water deficiency Schulze et al 2002

  24. See you next week!

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