Metabolic profiles in C3, C3-C4 intermediate, C4-like, and C4 species in the genus Flaveria.

ABSTRACT: C4 photosynthesis concentrates CO2 around Rubisco in the bundle sheath, favouring carboxylation over oxygenation and decreasing photorespiration. This complex trait evolved independently in >60 angiosperm lineages. Its evolution can be investigated in genera such as Flaveria (Asteraceae) that contain species representing intermediate stages between C3 and C4 photosynthesis. Previous studies have indicated that the first major change in metabolism probably involved relocation of glycine decarboxylase and photorespiratory CO2 release to the bundle sheath and establishment of intercellular shuttles to maintain nitrogen stoichiometry. This was followed by selection for a CO2-concentrating cycle between phosphoenolpyruvate carboxylase in the mesophyll and decarboxylases in the bundle sheath, an

SUBMITTER: Borghi GL 

PROVIDER: S-EPMC8890617 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature