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Science 14 March 1969:
Vol. 163. no. 3872, pp. 1219 - 1220
DOI: 10.1126/science.163.3872.1219
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Articles

Free-Energy Transfer in Plants

J. S. Boyer 1

1 Department of Botany, University of Illinois, Urbana 61801

Free-energy transfer was used to study water transport through the soil-plant system. Resistances to free-energy transfer are proportional to resistances to water transfer. Under certain conditions, the proportionality factor is 1. For a sunflower plant in moist soil, plant resistance to free-energy transfer was 30 times the soil resistance, and root-stem-leaf resistances were in a ratio of about 2 : 1 : 1, respectively. However, root and sidered for a unit pathlength.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Mycorrhizal Enhancement of Water Transport in Soybean.
G. R. Safir, J. S. Boyer, and J. W. Gerdemann (1971)
Science 172, 581-583
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Science. ISSN 0036-8075 (print), 1095-9203 (online)