A basal Carbon Concentrating Mechanism in Plants?.

EDUARDO JULIAN ZABALETA; MARTIN, M. V.; BRAUN, H.

PLANT SCIENCE

ELSEVIER IRELAND LTD

Lugar: Amsterdam; Año: 2012 vol. 187 p. 94 - 104

0168-9452

Many photosynthetic organisms have developed inorganic carbon (Ci) concentrating mechanisms (CCMs) which increase the CO2 concentration in the vicinity of Ribulose-1,5-bisphosphate Carboxylase/Oxygenase (RubisCO). Several CCMs were described in great detail, like Four carbon (C4) and Crassulacean acid metabolism (CAM), bicarbonate accumulation systems and capsular structures around RubisCO. These systems are believed to have evolved several times to acclimate organisms to disfavoring growth conditions. Based on recent experimental evidence we propose the occurrence of another more general CCM system, which allows efficient recycling of mitochondrial CO2 for carbon fixation in chloroplasts andwhich is present in all plants.