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Sap Pressure in Vascular Plants: Negative hydrostatic pressure can be measured in plants.
Abstract
A method is described which permits measurement of sap pressure in the xylem of vascular plants. As long predicted, sap pressures during transpiration are normally negative, ranging from -4 or -5 atmospheres in a damp forest to -80 atmospheres in the desert. Mangroves and other halophytes maintain at all times a sap pressure of -35 to -60 atmospheres. Mistletoes have greater suction than their hosts, usually by 10 to 20 atmospheres. Diurnal cycles of 10 to 20 atmospheres are common. In tall conifers there is a hydrostatic pressure gradient that closely corresponds to the height and seems surprisingly little influenced by the intensity of transpiration. Sap extruded from the xylem by gas pressure on the leaves is practically pure water. At zero turgor this procedure gives a linear relation between the intracellular concentration and the tension of the xylem.
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Citations
Cited by
Hydraulic architecture of some diffuse-porous trees
Zimmermann, M. H. (1978) · Canadian Journal of Botany · doi:10.1139/b78-274 · Cited by 522
Water transport in trees: current perspectives, new insights and some controversies
Meinzer, F. C., Clearwater, M. J., & Goldstein, G. (2001) · Environmental and Experimental Botany · doi:10.1016/s0098-8472(01)00074-0 · Cited by 293
Assessing structural effects on PRI for stress detection in conifer forests
Hernández-Clemente, R., Navarro-Cerrillo, R. M., Suárez, L., Morales, F., & Zarco-Tejada, P. J. (2011) · Remote Sensing of Environment · doi:10.1016/j.rse.2011.04.036 · Cited by 256
Silva, E. N., Ferreira-Silva, S. L., Fontenele, A. D. V., Ribeiro, R. V., Viégas, R. A., & Silveira, J. A. G. (2010) · Journal of Plant Physiology · doi:10.1016/j.jplph.2010.03.005 · Cited by 238
Exploring the Use of the Environmental Productivity Index Concept for Crop Production and Modeling
Raja Reddy, K., Kakani, V. G., & Hodges, H. F. (2008) · Advances in Agricultural Systems Modeling · doi:10.2134/advagricsystmodel1.c13 · Cited by 28
Metadata
- Authors
- Scholander, P. F., Bradstreet, E. D., Hemmingsen, E. A., & Hammel, H. T.
- Venue
- Science
- Published
- 1965-04-16
- Volume
- 148
- Issue
- 3668
- Pages
- 339-346
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2083778516
- Cited by
- 4,508
- References
- 0
- FWCI
- 63.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- Scholander, P. F., Bradstreet, E. D., Hemmingsen, E. A., & Hammel, H. T. (1965). Sap Pressure in Vascular Plants: Negative hydrostatic pressure can be measured in plants. Science. https://doi.org/10.1126/science.148.3668.339
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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