Abstract
Water and osmotic potential energies were measured with thermocouple psychrometers, at intervals during a 4-week period, in growing leaves of bean (Phaseolus vulgaris, var. Blue Lake) and barley (Hordeum vulgare, var. Liberty) plants having roots equally split between 2 differentially salinized nutrient solutions. The osmotic potentials of plants with half their roots in saline solutions were about halfway between the osmotic potentials of plants grown in nonsaline solutions and those grown in saline solutions. By the end of the 4-week measurement period, the beans and barley were almost mature. The final dry weights of shoots of plants with half their roots in saline solutions were about halfway between the dry weights of the shoots of plants grown in nonsaline solutions and the dry weights of those in saline solutions. The results obtained showed that the degree of osmotic adjustment and the rate of growth were functions of the proportion of the root system exposed to saline conditions.
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Selected References
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- Eaton F. M. WATER UPTAKE AND ROOT GROWTH AS INFLUENCED BY INEQUALITIES IN THE CONCENTRATION OF THE SUBSTRATE. Plant Physiol. 1941 Jul;16(3):545–564. doi: 10.1104/pp.16.3.545. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ehlig C. F. Measurement of Energy Status of Water in Plants With a Thermocouple Psychrometer. Plant Physiol. 1962 May;37(3):288–290. doi: 10.1104/pp.37.3.288. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gardner W. R., Nieman R. H. Lower Limit of Water Availability to Plants. Science. 1964 Mar 27;143(3613):1460–1462. doi: 10.1126/science.143.3613.1460. [DOI] [PubMed] [Google Scholar]