Deuterium Isotope Effect on Carbon Isotope Fractionation in Photosynthesis

Abstract
Plants grown in D2O show a decreased tendency to fractionate carbon-13 during photosynthetic incorporation of carbon dioxide. The isotopic ratio C13/C12 of the tissues of deuterated plants appears to be proportional to the deuterium content of the tissue. This effect was found in specimens of the partially deuterated vascular plant Nicotiana tabacum as well as in cultures of the fully deuterated alga Chlorella vulgaris.

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