Integrated physiological, biochemical and transcriptomic analyses revealed key genes regulating ascorbic acid biosynthesis during sweet potato development.

ABSTRACT: Sweet potato (Ipomoea batatas Lam.) is a globally important food crop with higher ascorbic acid (AsA) content than most staple crops. However, the regulatory mechanisms of AsA accumulation in sweet potato remain unclear. In this study, we systematically examined the regulatory network of AsA metabolism by integrating physiological and biochemical analyses with transcriptome sequencing in four representative varieties. The results revealed significant variation in AsA accumulation during root development, ranging from 10.96 to 36.45 mg/100 g FW. Metabolic pathway analysis showed that AsA biosynthesis is mainly regulated through the L-galactose pathway, involving the genes HK, PMI, PMM, GME, and GalLDH, and the myo-inositol pathway represented by

SUBMITTER: Zhou Q 

PROVIDER: S-EPMC12546898 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature