Global Change & Ecosystems

0455348 - ÚVGZ 2016 RIV CZ eng M - Část monografie knihy
Urban, Otmar - Šprtová, Miroslava
Effect of elevated CO2 concentration: Acclimation of Rubisco.
Global Change & Ecosystems. Volume 1. 1. Brno: Global Change Research Centre, Academy of Sciences of the Czech Republic, v. v. i, 2015 - (Urban, O.; Klem, K.), s. 78-88. ISBN 978-80-87902-14-1
Grant CEP: GA MŠMT(CZ) LO1415
Institucionální podpora: RVO:67179843
Klíčová slova: CO2 concentration * Rubisco * acclimation
Kód oboru RIV: EH - Ekologie - společenstva

There is clear evidence that such anthropogenic activities as fossil fuel burning, deforestation, land use change, and cement production have led to an increase in concentrations of CO2. Whether rising CO2 concentration will cause faster growth and higher photosynthetic C storage in C3 plants remains an open question. Downward acclimation of photosynthesis limited by Rubisco (primary photosynthetic enzyme) under elevated CO2 is frequently accompanied by decreased Rubisco activity; however, the mechanism and dynamics of Rubisco acclimation to elevated CO2. Inasmuch as the Rubisco active site exists in at least six forms but only two of these are catalytically active, there is no simple correlation between Rubisco content and activity. It is therefore necessary to apply different methodological approaches to study the acclimation of this key enzyme of photosynthetic CO2 uptake to elevated atmospheric CO2 concentration. We have shown that long-term Rubisco acclimation includes reduction of its content while its specific activity increases (i.e. a higher proportion of Rubisco is present in its active form in EC plants than in AC plants). Plants’ great capacity to tune Rubisco activity is thus demonstrated.
Trvalý link: http://hdl.handle.net/11104/0256099