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Stress Ecology WS 06/07 Ralf Schulz Combined chilling and (high) light stress - Tropical bean 6 h at 6 °C 3 h at 5.5 °C 2000 µmol m-2 s-1 varying light int. Factors and resources - Temperature 70 µmol m-2 s-1 constant 2000 µmol m-2 s-1 Schulze et al 2002 Different importance/effects of heavy metals on plants Factors and resources - Heavy metals Schulze et al 2002 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 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 Factors and resources (and associated reactions) Resources - Oxygen deficiency Resources - Oxygen deficiency Factors and resources - Oxygen deficiency Schulze et al 2002 Redox potential of a loamy soil Factors and resources - Oxygen deficiency Schulze et al 2002 Sequence of soil-bound redox reactions Factors and resources - Oxygen deficiency Schulze et al 2002 Root growth and redox potential - Spartania patens Factors and resources - Oxygen deficiency Schulze et al 2002 Germination of seeds in air or nitrogen Lettuce Rice Factors and resources - Oxygen deficiency Schulze et al 2002 Lipid degradation in rhizome tissue - Iris vs. Acorus Factors and resources - Oxygen deficiency Schulze et al 2002 Anatomical-morphological reactions to hypoxia - Rumex R. acetoselia Flooding-sensitive R. palustris Flooding-tolerant Factors and resources - Oxygen deficiency Schulze et al 2002 Factors and resources (and associated reactions) Resources - Water deficiency Dessication of plant cell upon exposure to air Factors and resources - Water deficiency Schulze et al 2002 Water storage in leaves of Peperomia Factors and resources - Water deficiency Schulze et al 2002 Cellular reaction to drought: ABA-mediated response Factors and resources - Water deficiency Schulze et al 2002 Responses of plant cells to drought Factors and resources - Water deficiency Schulze et al 2002 ABA-independent gene activation by drought Factors and resources - Water deficiency Schulze et al 2002 Response to drought - Accumulation of osmolytes Factors and resources - Water deficiency Schulze et al 2002 Accumulation of osmolytes - GM tobacco Factors and resources - Water deficiency Schulze et al 2002 CAM (Crassulacean Acid Metabolism) Factors and resources - Water deficiency Schulze et al 2002 Efficiencies of plants with different metabolisms Factors and resources - Water deficiency Schulze et al 2002 See you next week!
