The essentials of direct xylem pressure measurement

  title={The essentials of direct xylem pressure measurement},
  author={Chunfang Wei and Ernst Steudle and Melvin T. Tyree and Philip M. Lintilhac},
  journal={Plant Cell and Environment},
This paper discusses the essentials of the oil-filled pressure probe technique in the measurement of negative xylem pressures, focusing in particular on the technique and physics underlying our recent, successful experiment which has rekindled the debate on the validity of the Cohesion–Tension theory. We illustrate a number of general problems associated with the cell pressure probe and xylem pressure probe techniques, and propose appropriate criteria for micropipette construction. We enumerate… 

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