The growth of soybean under free air [CO(2)] enrichment (FACE) stimulates photosynthesis while decreasing in vivo Rubisco capacity

Planta
Carl J BernacchiStephen P Long

Abstract

Down-regulation of light-saturated photosynthesis (A(sat)) at elevated atmospheric CO(2) concentration, [CO(2)], has been demonstrated for many C(3) species and is often associated with inability to utilize additional photosynthate and/or nitrogen limitation. In soybean, a nitrogen-fixing species, both limitations are less likely than in crops lacking an N-fixing symbiont. Prior studies have used controlled environment or field enclosures where the artificial environment can modify responses to [CO(2)]. A soybean free air [CO(2)] enrichment (FACE) facility has provided the first opportunity to analyze the effects of elevated [CO(2)] on photosynthesis under fully open-air conditions. Potential ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) carboxylation (V(c,max)) and electron transport through photosystem II (J(max)) were determined from the responses of A(sat) to intercellular [CO(2)] (C(i)) throughout two growing seasons. Mesophyll conductance to CO(2) (g(m)) was determined from the responses of A(sat) and whole chain electron transport (J) to light. Elevated [CO(2)] increased A(sat) by 15-20% even though there was a small, statistically significant, decrease in V(c,max). This differs from previous studies in that ...Continue Reading

References

Sep 21, 2004·Annual Review of Plant Biology·Stephen P LongDonald R Ort
Feb 1, 1989·Plant Physiology·R F SageJ R Seemann
Mar 1, 1994·Photosynthesis Research·I E Woodrow
Jan 1, 1998·Oecologia·Peter S Curtis, Xianzhong Wang

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Citations

Feb 11, 2009·Proceedings of the National Academy of Sciences of the United States of America·Andrew D B LeakeyDonald R Ort
Apr 28, 2009·Journal of Experimental Botany·Ulo NiinemetsCharles R Warren
Jun 19, 2009·Plant Physiology·Frank G Dohleman, Stephen P Long
Aug 13, 2014·Plant Science : an International Journal of Experimental Plant Biology·Usue Pérez-LópezAlberto Muñoz-Rueda
Aug 13, 2014·Plant Science : an International Journal of Experimental Plant Biology·Jaume FlexasAntonio Diaz-Espejo
Apr 30, 2009·Journal of Experimental Botany·Andrew D B LeakeyDonald R Ort
May 29, 2008·Photosynthesis Research·Quan-Sheng QiuSteven C Huber
Feb 19, 2013·Plant Science : an International Journal of Experimental Plant Biology·Shouren ZhangBing Cao
Jul 17, 2012·Plant Science : an International Journal of Experimental Plant Biology·Jaume FlexasCharles R Warren
Nov 13, 2007·Plant, Cell & Environment·Jaume FlexasHipólito Medrano
Feb 1, 2007·Plant, Cell & Environment·Elizabeth A Ainsworth, Alistair Rogers
Nov 4, 2006·Plant, Cell & Environment·Stephen P LongDonald R Ort
Aug 31, 2007·Plant, Cell & Environment·Jaume FlexasMiquel Ribas-Carbo
Apr 18, 2013·Plant, Cell & Environment·Carl J BernacchiAndy Vanloocke
Jun 4, 2014·The New Phytologist·Marloes P van LoonNiels P R Anten
Aug 26, 2015·Ecology and Evolution·David J WestonStan D Wullschleger

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