Biodiversitas Journal of Biological Diversity
Vol. 21 No. 9 (2020)

Potentially lactic acid bacteria as an EPS producing starter from yellow sweet potato fermentation

NETI YULIANA (Department of Agroindustrial Technology, Faculty of Agriculture, Universitas Lampung. Jl. Prof. Sumantri Brojonegoro No. 1, Bandar Lampung 35145, Lampung, Indonesia)
Sumardi SUMARDI (Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Lampung. Jl. Prof. Sumantri Brojonegoro No. 1, Bandar Lampung 35145, Lampung, Indonesia)
EDO JATMIKO (Department of Agroindustrial Technology, Faculty of Agriculture, Universitas Lampung. Jl. Prof. Sumantri Brojonegoro No. 1, Bandar Lampung 35145, Lampung, Indonesia)
MENTARI ROSALINE (Department of Agroindustrial Technology, Faculty of Agriculture, Universitas Lampung. Jl. Prof. Sumantri Brojonegoro No. 1, Bandar Lampung 35145, Lampung, Indonesia)
MUHAMMAD IQBAL (Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Lampung. Jl. Prof. Sumantri Brojonegoro No. 1, Bandar Lampung 35145, Lampung, Indonesia)



Article Info

Publish Date
26 Aug 2020

Abstract

  Potentially lactic acid bacteria as a starter for EPS production from yellow sweet potato fermentation were determined. The fermentation profile and partial characteristics of isolated lactic acid bacteria were used as considerations. The fermentation of yellow sweet potato was performed in the back-slopping and spontaneous procedure and was paid attention to the hours of 0, 24, 48, and 72.  The results showed that the 72 hours of fermentation was found to have the highest EPS metabolites, the number of a LAB, the total lactic acid, and the lowest pH. The 72 hours of fermentation also seemed to cause a significant change in the sweet potato starch granules morphology.   The potential starter, therefore, can be taken from the yellow sweet potato fermentation either spontaneously or by a back-slopping method, at 72 hours. From the sixty selected LAB, the 34 strains showed an ability to produce EPS. Among these, eight strains exhibited the potential high production of  EPS.  They were capable of growth on 28-45C and exhibited tolerance to 3-4% NaCl. The favorable carbon sources for the growth and production of EPS were isolated dependent.

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Journal Info

Abbrev

biodiv

Publisher

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

Description

The Biodiversitas Journal was first published in 2000 by the Department of Biology, FMNS, Universitas Sebelas Maret, Surakarta, Indonesia, then in 2006 it was co-published by the Society for Indonesian Biodiversity and that department; since 2017 it was also hosted by Smujo. From 2003-2012 it was ...