Photosynthesis: Physiological and Ecological Considerations
Photosynthesis: Physiological and Ecological Considerations
Photosynthesis: Physiological and Ecological Considerations
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45CO 2 assimilationH 2 O evaporationStomatalconductanceFIGURE 9.24Photosyntheticcarbon assimilation,evaporation, <strong>and</strong>stomatalconductance9.6.1 Carbon isotope ratio variations reveal differentphotosynthetic pathways9.6.2 How do we measure the carbon isotopes of plants?4613CO13 2C / 12 C ratio (R) of plant : R 12CO2Carbon isotope ratio ( 13 C) of plant :13 C%oR Rsamplest<strong>and</strong>ard1 1000where the st<strong>and</strong>ard represents thecarbon isotopes contained in afossil belemnite from the Pee Deelimestone formation of SouthCarolina.(http://en.wikipedia.org/wiki/)23
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