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SUMMARY:Exploiting the crassulacean acid metabolism (CAM) pathway for sust
 ainable bioenergy production in a changing climate - Nicholas Owen
DTSTART:20140626T153000Z
DTEND:20140626T160000Z
UID:TALK51420@talks.cam.ac.uk
CONTACT:Megan Cooper
DESCRIPTION:Crassulacean acid metabolism (CAM) was modeled by taking a sys
 tem dynamics (SD) approach. SD considers that the interplay between elemen
 ts of a complex system have the capacity to explain counterintuitive non-l
 inearities arising from ostensibly simple inputs. The model allowed measur
 ed physiological constants to be quantitatively related to CAM expression.
  Simulated CAM-expression for Kalanchoë daigremontiana displayed strong c
 orrelation with measured gas-exchange and malic-acid accumulation (R2=0.93
 1\, 0.852 respectively). The four-Phases of CAM-expression were further re
 solved into parameters that rate-limit carbon-uptake over the diel-cycle. 
 Next\, a geospatial spatial model of CAM productivity based on Nobel envir
 onmental productivity index methodology (EPI) for the bioenergy candidates
  A. tequilana and O. ficus-indica will be presented.  Yield simulations we
 re performed under the four representative concentration pathways (RCPs) i
 n the IPCCs 5th Assessment Report. Simulations for O. ficus-indica suggest
  that viable yields (> 5 Mg ha-1 yr-1) on low-grade lands have the capacit
 y to meet ‘extreme’ bioenergy demand targets (>600 EJ yr-1) without us
 ing high-grade agricultural land or contributing to deforestation\, and wi
 ll continue to do so under the worst-case climate change scenario.
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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