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Ecophysiological Aspects of Phloem Transport in Trees

  • Teemu HölttäEmail author
  • Maurizio Mencuccini
  • Eero Nikinmaa
Chapter
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Part of the Plant Ecophysiology book series (KLEC, volume 9)

Abstract

The primary function of the phloem is the transport of assimilate products from mature leaves to other tissues. Here we examine this function from a whole tree perspective and relate it to assimilate production, tree water relations, and tree structure. We argue that the turgor and osmotic pressures driving flow in the phloem are determined by these factors. An example calculation of these interactions is presented. The generalizations and possible shortcomings of the Münch flow hypothesis, the simplest theoretical framework used in describing phloem transport, are also discussed.

Keywords

Sugar Concentration Turgor Pressure Sieve Tube Sieve Element Xylem Water 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

T. Hölttä received funding from Academy of Finland project #1132561. M. Mencuccini received funding from NERC grant number NE/I011749/1.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Teemu Hölttä
    • 1
    Email author
  • Maurizio Mencuccini
    • 2
  • Eero Nikinmaa
    • 1
  1. 1.Department of Forest SciencesUniversity of HelsinkiHelsinkiFinland
  2. 2.School of GeoSciencesUniversity of EdinburghEdinburghUK

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