The 'photosynthetic C₁ pathway' links carbon assimilation and growth in California poplar.

ABSTRACT: Although primarily studied in relation to photorespiration, serine metabolism in chloroplasts may play a key role in plant CO₂ fertilization responses by linking CO₂ assimilation with growth. Here, we show that the phosphorylated serine pathway is part of a 'photosynthetic C₁ pathway' and demonstrate its high activity in foliage of a C₃ tree where it rapidly integrates photosynthesis and C₁ metabolism contributing to new biomass via methyl transfer reactions, imparting a large natural ¹³C-depleted signature. Using ¹³CO₂-labelling, we show that leaf serine, the S-methyl group of leaf methionine, pectin methyl esters, and the associated methanol released during cell wall expansion during growth, are direc

SUBMITTER: Jardine KJ 

PROVIDER: S-EPMC11549359 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature