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Source–sink balance and carbon allocation below ground in plants exposed to ozone
Author(s) -
Andersen Christian P.
Publication year - 2003
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1046/j.1469-8137.2003.00674.x
Subject(s) - ozone , tropospheric ozone , environmental science , sink (geography) , atmospheric sciences , soil water , ecosystem , carbon sink , soil respiration , atmosphere (unit) , carbon cycle , soil carbon , ecology , meteorology , soil science , biology , geography , geology , cartography
Summary 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.ContentsSummary 213 I. Introduction 213 II. Source–sink model: carbohydrate signaling 214 III. Effect of ozone on above‐ground sources and sinks 216 IV. Decreased allocation below ground 218 V. Carbon flux to soils 220 VI. Soil food web 223 VII. Summary, conclusions and future research 223Acknowledgements 223References 223