Root xylem CO2 flux: an important but unaccounted-for component of root respiration

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• 作者：Jasper Bloemen ; R. O. Teskey ; M. A. McGuire ; D. P. Aubrey ; K. Steppe
• 关键词：Tree roots ; Soil respiration ; Xylem CO2 transport ; Tree carbon cycle ; Carbon allocation
• 刊名：Trees - Structure and Function
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：30
• 期：2
• 页码：343-352
• 全文大小：990 KB
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• 作者单位：Jasper Bloemen (1) (2)
  R. O. Teskey (3)
  M. A. McGuire (3)
  D. P. Aubrey (4)
  K. Steppe (1)
  
  1. Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000, Ghent, Belgium
  2. Institute of Ecology, University of Innsbruck, Sternwartestraße 15, 6020, Innsbruck, Austria
  3. Warnell School of Forestry and Natural Resources, University of Georgia, 180 East Green St, Athens, GA, 30602-2152, USA
  4. Department of Biology, Georgia Southern University, P.O. Box 8042, Statesboro, GA, 30460-8042, USA
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Forestry
  Plant Sciences
  Agriculture
  Plant Anatomy and Development
  Plant Pathology
  Plant Physiology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-2285

文摘

Key message In tree roots, a large fraction of root-respired CO ₂ remains within the root system rather than diffusing into the soil. This CO ₂ is transported in xylem sap into the shoot, and because respiration is almost always measured as the flux of CO ₂ into the atmosphere from plant tissues, it represents an unaccounted-for component of tree root metabolism.