Carbon partitioning in N2 fixing Medicago sativa plants exposed to different CO2 and temperature conditions

Functional Plant Biology : FPB
Iker AranjueloSalvador Nogués

Abstract

Many of the studies analysing the CO2 effect on plant development have been conducted in optimal growth conditions. Furthermore, although some of those studies suggest that legumes might show a steady productivity increase with rising CO2, the role of nodule activity on the plant responsiveness to predicted atmospheric CO2 enhancement is not well understood. In this study, C (metabolism and allocation) and N (nodule activity) interaction between the plant and the bacterial symbiont during the photosynthetic acclimation of N2-fixing alfalfa (Medicago sativa L. cv. Aragón) plants exposed to elevated CO2 and temperature conditions was analysed. The plants were grown in temperature gradient greenhouses (TGG) where, in the case of elevated CO2 treatments, the isotopic 13C/12C composition (δ13C) inside the TGG was modified. Compared with the corresponding temperature treatment, exposure to 700 μmol mol-1 CO2 enhanced dry mass (DM) of plants in elevated temperature treatments (26%), whereas no significant effect was detected in ambient temperature treatments. The δ13C data revealed that although all the carbon corresponding to leaf total organic matter (TOM) came from newly assimilated C, plants exposed to elevated CO2 did not develop...Continue Reading

References

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Citations

May 20, 2011·Rapid Communications in Mass Spectrometry : RCM·Iker AranjueloIsabel Fleck
Aug 5, 2009·Rapid Communications in Mass Spectrometry : RCM·Iker AranjueloSalvador Nogués
Mar 14, 2013·Journal of Integrative Plant Biology·Alvaro Sanz-SáezManuel Sanchez-Diaz
Dec 17, 2008·Rapid Communications in Mass Spectrometry : RCM·Antoni PardoSalvador Nogués
Oct 18, 2019·International Journal of Molecular Sciences·David SobaIker Aranjuelo

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