Size and function in conifer tracheids and angiosperm vessels.

  title={Size and function in conifer tracheids and angiosperm vessels.},
  author={John S. Sperry and Uwe G. Hacke and Jarmila Pittermann},
  journal={American journal of botany},
  volume={93 10},
The wide size range of conifer tracheids and angiosperm vessels has important consequences for function. In both conduit types, bigger is better for conducting efficiency. The gain in efficiency with size is maximized by the control of conduit shape, which balances end-wall and lumen resistances. Although vessels are an order of magnitude longer than tracheids of the same diameter, they are not necessarily more efficient because they lack the low end-wall resistance of tracheids with torus… CONTINUE READING
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