Abstract
18O/16O ratios from the juices of a number of fruits and vegetables were measured and found to be isotopically more enriched than the water in which they grew. Fast-growing high-water-content vegetables exhibited less enrichment than slower growing fruits such as apples, pears, and plums. 18O/16O measurements were also made on the water from various sections of several plants, and the enrichment was found to occur in the following order: leaves > fruit > stem ≥ ground water.
D/H and 18O/16O measurements were made on a series of grape juice samples and, when plotted against each other, gave a slope of 3.9, indicating that the physical process causing this enrichment was probably evaporation, i.e. evapotranspiration.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Dongmann G., Nürnberg H. W., Förstel H., Wagener K. On the enrichment of H2 18-O in the leaves of transpiring plants. Radiat Environ Biophys. 1974 Mar 29;11(1):41–52. doi: 10.1007/BF01323099. [DOI] [PubMed] [Google Scholar]
- Epstein S., Thompson P., Yapp C. J. Oxygen and hydrogen isotopic ratios in plant cellulose. Science. 1977 Dec 23;198(4323):1209–1215. doi: 10.1126/science.198.4323.1209. [DOI] [PubMed] [Google Scholar]
- Farris F., Strain B. R. The effects of water-stress on leaf H2(18O) enrichment. Radiat Environ Biophys. 1978 Aug 10;15(2):167–202. doi: 10.1007/BF01323264. [DOI] [PubMed] [Google Scholar]
- Zundel G., Miekeley W., Grisi B. M., Förstel H. The H2(18O) enrichment of the leaf water of tropic trees: comparison of species from the tropical rain forest and the semi-arid region in Brazil. Radiat Environ Biophys. 1978 Aug 10;15(2):203–212. doi: 10.1007/BF01323265. [DOI] [PubMed] [Google Scholar]