Hydrogen, Oxygen, and Carbon Isotope Ratios of Cellulose from Submerged Aquatic Crassulacean Acid Metabolism and Non-Crassulacean Acid Metabolism Plants

Abstract
Isotope ratios of cellulose and cellulose nitrate from aquatic Crassulacean acid metabolism (CAM) [Isoetes howelii] and non-CAM plants [Chara contraria, Eleocharis acicularis, Ranunculus aquatilis] were determined. Cellulose O2 isotope ratios for all plants that grew together were virtually identical, whereas large differences were observed for H isotope ratios of cellulose nitrate between CAM and non-CAM plants. C isotope ratios of cellulose nitrate did not differentiate CAM from non-CAM plants.