Dynamics and diversity of the bacterial community during the spontaneous decay of açai (Euterpe oleracea) fruits

Abstract The biodiversity and evolution of the microbial community in açai fruits (AF) between three geographical origins and two spontaneous decay conditions were examined by applying culture-independent methods. Culture-independent methods based on 16S rRNA from fifteen samples revealed that Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes and Acidobacteria were the most abundant phyla. At the genus level, Massilia (taxon with more than 50% of the sequences remaining constant during the 30 h of decay), Pantoea, Naxibacter, Enterobacter, Raoultella and Klebsiella were identified, forming the carposphere bacterial microbiota of AF. AF is fibre-rich and Massilia bacteria could find a large quantity of substrate for its growth through cellulase production. Beta diversity showed that the quality parameters of AF (pH, soluble solids, titratable acidity and lipids) and elemental analysis (C, N, H and C/N ratio) were unable to drive microbial patterns in AF. This research offers new insight into the indigenous bacterial community composition on AF as a function of spontaneous postharvest decay.

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Bibliographic Details
Main Authors: Moura,Fábio Gomes, Graças,Diego Assis das, Santos,Agenor Valadares, Silva,Artur Luiz da Costa da, Rogez,Hervé
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Microbiologia 2018
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500025
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