C₄-like Sesuvium sesuvioides (Aizoaceae) exhibits CAM in cotyledons and putative C₄-like + CAM metabolism in adult leaves as revealed by transcriptome analysis.

ABSTRACT:

Background

The co-occurrence of C₄ and CAM photosynthesis in a single species seems to be unusual and rare. This is likely due to the difficulty in effectively co-regulating both pathways. Here, we conducted a comparative transcriptomic analysis of leaves and cotyledons of the C₄-like species Sesuvium sesuvioides (Aizoaceae) using RNA-seq.

Results

When compared to cotyledons, phosphoenolpyruvate carboxylase 4 (PEPC4) and some key C₄ genes were found to be up-regulated in leaves. During the day, the expression of NADP-dependent malic enzyme (NADP-ME) was significantly higher in cotyledons than in leaves. The titratable acidity confirmed higher acidity in the morning than in the previous evening indicating the induction of weak CAM in cotyledon

SUBMITTER: Siadjeu C 

PROVIDER: S-EPMC11245778 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature