Evolution of Water Transport and Xylem Structure

  title={Evolution of Water Transport and Xylem Structure},
  author={John S. Sperry},
  journal={International Journal of Plant Sciences},
  pages={S115 - S127}
  • J. Sperry
  • Published 1 May 2003
  • Environmental Science
  • International Journal of Plant Sciences
Land plants need water to replace the evaporation that occurs while atmospheric CO2 is diffusing into photosynthetic tissue. [] Key Result Transport improvements appeared as water demand increased and CO2 dropped to current values in the Carboniferous and Permian. Stomatal regulation and high‐conductivity conduits permitted larger plants and a transition from poikilohydric to homoiohydric water relations. The evolution of conduits from hydroids through tracheids to vessels reflects the need to balance…
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    Philosophical Transactions of the Royal Society B: Biological Sciences
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