Oxygen and Hydrogen Isotopic Ratios in Plant Cellulose

Details Oxygen and Hydrogen Isotopic Ratios in Plant Cellulose Oxygen and Hydrogen Isotopic Ratios in Plant Cellulose

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977sci...198.1209e&link_type=abstract

Science, Volume 198, Issue 4323, pp. 1209-1215

Computer Science

22

Scientific paper

The variations of the D/H and 18O/16O ratios of nonexchangeable hydrogen and oxygen in plant cellulose reveal systematic differences between aquatic and terrestrial plant groups. The slope of δ D versus δ 18O 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 CO2 and H2O 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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