Purple-fleshed sweetpotato (PFSP) accumulates high amounts of anthocyanins that are beneficial to human health. Although biosynthesis of such secondary metabolites has been well studied in aboveground organs of many plants, the mechanisms underlying anthocyanin accumulation in underground tuberous roots of sweetpotato are less understood. To identify genes and metabolites involved in anthocyanin accumulation in sweetpotato, we performed comparative transcriptomic and metabolomic analysis of (PFSP) and white-fleshed sweetpotato (WFSP). Anthocyanin-targeted metabolome analysis revealed that delphinidin, petunidin, and rosinidin were the key metabolites conferring purple pigmentation in PFSP as they were highly enriched in PFSP but absent in WFSP. Transcriptomic analysis identified 358 genes that were potentially implicated in multiple pathways for the biosynthesis of anthocyanins. Although most of the genes were previously known for their roles in anthocyanin biosynthesis, we identified 26 differentially expressed genes that are involved in Aux/IAA-ARF signaling. Gene-metabolite correlation analysis also revealed novel genes that are potentially involved in the anthocyanin accumulation in sweetpotato. Taken together, this study provides insights into the genes and metabolites underlying anthocyanin enrichment in underground tuberous roots of sweetpotato.
|Number of pages||10|
|Journal||Plant Physiology and Biochemistry|
|State||Published - Nov 2020|
Bibliographical noteFunding Information:
This study was funded by National Key Research and Development Program of China ( 2018YFD1000700 , 2018YFD1000705 ), Key Research and Development Project of Shanxi Province ( 201803D221008-6 ), Natural Science Foundation of Shanxi Province ( 201801D121238 ), Science and Technology Innovation project of Shanxi Agricultural University ( 2018yz001 ), Shanxi Provincial Leading Talents in Emerging Industries Project, Special Plan of Scientific Research for Shanxi Agriculture Valley Construction of China ( SXNGJSKYZX201701-03 ).
© 2020 Elsevier Masson SAS
- Anthocyanin accumulation
- Underground tuberous roots
ASJC Scopus subject areas
- Plant Science