Biology 2601A/B Study Guide - Quiz Guide: Carbon Cycle, Hordeum, Light-Independent Reactions
20 Nov 2017
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Document Summary
Effects of cold stress on photosynthesis in barley, hordeum vulgare. Organisms are continuously exposed to a wide range of environmental conditions. These sudden changes in the environment evoke acute short-term responses to maintain homeostasis and long-term responses such as acclimation to minimize the stress effect in the organism. These responses help organisms regain performance under new condition, which improves their survival rate (way & staples, 2017). A natural environment for plants is composed of water stress/light stress (abiotic stresses), and nutrient stress/competition (biotic stresses). These factors limit a plant"s growth, as well as its reproduction ability. Since photosynthesis is a highly integrated and regulated metabolic process, stress can reduce the overall photosynthetic capacity of a plant. Chloroplast which is the major component of photosynthesis, greatly contributes to stress responses regulation due to its sensitivity to environmental changes (ashraf, 2013). Plants and some protists undergo anabolic process photosynthesis.
