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Oxygen and Hydrogen Isotopic Ratios in Plant Cellulose

Epstein, Samuel and Thompson, Peter and Yapp, Crayton J. (1977) Oxygen and Hydrogen Isotopic Ratios in Plant Cellulose. Science, 198 (4323). pp. 1209-1215. ISSN 0036-8075. doi:10.1126/science.198.4323.1209.

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The variations of the D/H and ^(18)O/^(16)O ratios of nonexchangeable hydrogen and oxygen in plant cellulose reveal systematic differences between terrestrial plant groups. The slope of δD versus δ^(18)O of cellulose from a variety of aquatic plants is close to 8 (the meteoric water value), while the slope for a number of terrestrial species is greater than or equal to about 24. Two models involving incorporation of CO_2 and H_2O into cellulose precursors are proposed to account for these differences. Effects of evaporative transpiration on the isotopic composition of water in leaves are measured and discussed in the context of these models.

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Additional Information:© 1977 American Association for the Advancement of Science. We wish to thank R. Potter, C. Kendall, M. Johnson, and J. Way for making many of the analyses. M. DeNiro helped collect samples, provided scientific advice, helped in many of the operations carried out, and critically read the manuscript. H.-W. Yeh provided both technical and scientific help throughout the project. Discussion with J. F. Bonner was most welcome throughout this research. Samples were provided by C. Emiliani of the University of Miami, H. D. Bruhn of the University of Wisconsin, and H. P. Taylor of the California Institute of Technology. The work was supported by the National Science Foundation, Office of Climate Dynamics, grant number ATM76-03972. This is contribution 2897 from the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena 91125.
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Caltech Division of Geological and Planetary Sciences2897
Issue or Number:4323
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Official Citation:Epstein, S., Thompson, P., & Yapp, C. J. (1977). Oxygen and Hydrogen Isotopic Ratios in Plant Cellulose. Science, 198(4323), 1209-1215. doi: 10.1126/science.198.4323.1209
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55789
Deposited On:27 Mar 2015 19:22
Last Modified:10 Nov 2021 20:50

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