A Critical Evaluation of Tissue-Immersion Methods for Measurement of Plant Water Potential
Plant water potential was measured simultaneously by the change-in-length method and the Schardakow-dye method on segments of potato tubers. In over half of the tests, the change-in-length method underestimated the true water potential, interpreted to be the result of several sources of error inherent in the method. Therefore, the dye method is strongly recommended as the only tissue-immersion method suitable for field measurement of plant water potential.
Author Institution: Environmental Research Laboratory, University of Arizona, Tucson, Arizona 85721
The Ohio Journal of Science. v70 n1 (January, 1970), 34-38