Stress Ecology and Resource Management

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!