Comparison of theoretical enhancements in photosynthesis in response to elevated CO2 and experimentally observed enhancements

Range Table - link %
Organism Plants
Reference Kirschbaum MUF (2011) Does enhanced photosynthesis enhance growth? Lessons learned from CO2 enrichment studies. Plant Physiol 155: 117–24 p.119 table IPubMed ID21088226
Primary Source Drake BG, Gonzalez-Meler MA, Long SP (1997) More efficient plants: a consequence of rising atmospheric CO2? Annu Rev Plant Physiol Plant Mol Biol 48: 609–639 & Ellsworth DS, Reich PB, Naumburg ES, Koch GW, Kubiske ME, Smith SD (2004) Photosynthesis, carboxylation and leaf nitrogen responses of 16 species to elevated pCO2 across four free-air CO2 enrichment experiments in forest, grassland and desert. Glob Change Biol 10: 2121–2138 DOI: 10.1111/j.1365-2486.2004.00867.x & Ainsworth EA, Long SP (2005) What have we learned from 15 years of freeair CO2 enrichment (FACE)? A meta-analytic review of the responses of photosynthesis, canopy properties and plant production to rising CO2. New Phytol 165: 351–371PubMed ID15012276, 15720649
Comments "These enhancements of photosynthesis are broadly consistent with experimental observations (Table I). Ellsworth et al. (2004) and Ainsworth and Long (2005) in their respective reviews of the literature found 40% and 29% enhancements of photosynthesis in free-air CO2 enrichment (FACE) experiments (Table I) at elevated CO2 concentrations of 500 to 600 µmol/mol. Drake et al. (1997), in a review of potted plant experiments, found that photosynthesis was increased by 23% to 58% when plants were grown in elevated CO2 of about 700µmol/mol, depending on their nitrogen status and the size of pots they were grown in. Plants grown with inadequate nutrients or in small pots were likely to be affected by feedback inhibition, an issue that is further discussed below. For the plants that were least affected by these extra limitations, a 58% enhancement in photosynthesis was observed, which lies between the theoretical enhancements for RuBP regeneration-limited and Rubisco-limited rates at 25°C (Table I)." See note beneath table
Entered by Uri M
ID 110845