Proteome dynamics of the developing açaí berry pericarp (Euterpe oleracea Mart.)

ABSTRACT: A quantitative proteome analysis of four developmental stages of pericarp tissues of the açaí berry (Euterpe oleracea Mart.) was performed by the isobaric labeling of peptides with iTRAQ® 4-plex, HILIC pre-fractionation of labeled peptides and high-performance mass spectrometry analysis. This analysis resulted in the identification of 4286 proteins, of which 476 presented differential abundance between the stages. The differential abundance of these proteins was seen to be coordinated with the metabolic demands during cell division, lignification, and cell expansion at developmental stages 1 and 2, as well phenolic acids accumulation and metabolic changes in the fruit maturation, at developmental stages 3 and 4. The distinct accumulation of anthocyanins observed in the pericarp at developmental stage 4 was correlated with the increase in abundance of some key biosynthetic enzymes, such as leucoanthocyanidin dioxygenase, anthocyanidin O-3-glycosyltransferase and UDP-glycosyltransferase. Here evidence is also provided for the presence in the açaí berry of secondary metabolites not previously described in açaí, such as pterostilbene, matairesinol and furaneol. Together, these results will pave the way for studies aimed at the genetic improvement of the nutritional properties of this important fruit crop.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Euterpe Oleracea

TISSUE(S): Pericarp

SUBMITTER: Proteomics Unit  

LAB HEAD: Fabio Nogueira

PROVIDER: PXD015357 | Pride | 2019-12-11

REPOSITORIES: Pride