THE BIOELECTRIC POTENTIALS OF PLANTS AND THEIR FUNCTIONAL SIGNIFICANCE: V. SOME DAILY AND SEASONAL CHANGES IN THE ELECTRICAL POTENTIAL AND RESISTANCE OF LIVING TREES
- 1 June 1963
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 41 (6), 831-851
- https://doi.org/10.1139/b63-068
Abstract
Continuous records of bioelectric stem potentials have been made throughout a season for three kinds of tree: Ulmus americana L., Pinus resinosa Ait., and Acer saccharum Marsh. Daily measurements of potential and resistance for a 15-month period have also been made on a maple and some direct measurements of current are also given. A yearly rhythm was clearly visible, also daily cycles, and during the growing season cycles of 5-minute frequency. The yearly and daily rhythms have been interpreted in terms of electro-osmosis or streaming potential and seem to be correlated with the transport within the tree. The 5-minute oscillations have been related to cambial growth.Keywords
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