Source-Sink Balance and Carbon Allocation below Ground in Plants Exposed to Ozone

• Published in: The New phytologist Vol. 157; no. 2; pp. 213 - 228
• Main Author: Andersen, Christian P.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Science 01.02.2003; Blackwell Science Ltd; Blackwell
• Subjects: Acid soils; Animal, plant and microbial ecology; Applied ecology; biochemical pathways; Biological and medical sciences; carbohydrate signaling; carbohydrates; carbon; carbon allocation; Carbon dioxide; dry matter partitioning; ecosystems; Ecotoxicology, biological effects of pollution; environmental exposure; Fundamental and applied biological sciences. Psychology; growth and development; Lead; Leaves; Non agrochemicals pollutants; Ozone; Phytopathology. Animal pests. Plant and forest protection; Pine trees; plant development; plant growth; Plant roots; Plants; Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; rhizodeposition; root systems; roots; Seedlings; soil; Soil ecology; soil food webs; soil processes; source-sink relationships; source–sink balance; symbionts; symbiosis; Tansley Reviews; Terrestrial environment, soil, air; troposphere; tropospheric ozone; carbohydrate signaling; Growth; symbionts; Resource allocation; Environmental factor; Ozone; Oxidant; Review; Metabolism; Source sink relationship; Carbon cycle; Pollutant; Signal transduction; tropospheric ozone; Phytotoxicity; rhizodeposition; Ecosystem; source-sink balance; Air pollution; carbon allocation; roots soil processes; roots; soil processes
• ISSN: 0028-646X; 1469-8137; 1469-8137
• DOI: 10.1046/j.1469-8137.2003.00674.x

The role of tropospheric ozone in altering plant growth and development has been the subject of thousands of publications over the last several decades. Still, there is limited understanding regarding the possible effects of ozone on soil processes. In this review, the effects of ozone are discussed using the flow of carbon from the atmosphere, through the plant to soils, and back to the atmosphere as a framework. A conceptual model based on carbohydrate signaling is used to illustrate physiological changes in response to ozone, and to discuss possible feedbacks that may occur. Despite past emphasis on above-ground effects, ozone has the potential to alter below-ground processes and hence ecosystem characteristics in ways that are not currently being considered.