Variability in Crassulacean Acid Metabolism: A Survey of North Carolina Succulent Species

  title={Variability in Crassulacean Acid Metabolism: A Survey of North Carolina Succulent Species},
  author={Craig Edwin Martin and Anne E. Lubbers and James A. Teeri},
  journal={Botanical Gazette},
  pages={491 - 497}
The correlation between succulence and Crassulacean acid metabolism (CAM) was investigated in 28 succulent species growing in various habitats throughout North Carolina. Three species (Opuntia compressa, Agave virginica, and Tillandsia usneoides) exhibited diurnal fluctuations in tissue titratable acidity, nighttime uptake of ~14CO2, and a high carbon isotope ratio (~δ13C), all indicators of CAM. Seven species displayed one or two characteristics of CAM in situ yet yielded lower δ13~C values… 
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