Biology 2601A/B Lecture Notes - Lecture 2: Hordeum, Homeostasis, Photorespiration
26 Oct 2018
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Document Summary
Effects of cold sress on photosynthesis in barley, hordeum vulgare. Organisms display the capacity to acutely respond to changes within their local environments to maintain internal homeostasis. In the face of environmental changes, stressful conditions are imposed upon an organism, forcing adjustment to physiological and behavioural processes to combat any potential detrimental effects. If exposure to these changed conditions are prolonged, organisms may undergo acclimation to survive stressful conditions present in their local environment (hill et al, 2012). Due to their lack of locomotion, plants face exposure to variability in their environment in the face of temperature change, water abundance, light and nutrient availability and competition. These environmental pressures effect their ability to maintain a photosynthetic capacity suitable enough to meet the demands for survival and reproduction. Photosynthesis, a highly regulated process, balances the absorption of light energy in source reactions in addition to the consumption of energy via metabolic sinks (ensminger et al,
