Plant Foods for Human Nutrition

, Volume 62, Issue 2, pp 65–70 | Cite as

Lactic Acid Fermentation of β-Carotene Rich Sweet Potato (Ipomoea batatas L.) into Lacto-juice

  • Smita H. Panda
  • Ramesh C. RayEmail author


Lacto-juices processed by lactic acid fermentation bring about a change in the beverage assortment for their high nutritive value, vitamins and minerals which are beneficial to human health when consumed. Sweet potato roots (non-boiled/ fully-boiled) were fermented with Lactobacillus plantarum MTCC 1407 at 28 ± 2°C for 48 h to make lacto- juice. During fermentation both analytical [pH, titratable acidity, lactic acid, starch, total sugar, reducing sugar (g/kg roots), total phenol and β-carotene (mg/kg roots)] and sensory (texture, taste, aroma, flavour and after taste) analyses of sweet potato lacto-juice were evaluated. The fermented juice was subjected to panelist evaluation for acceptability. There were no significant variations in biochemical constituents (pH, 2.2–3.3; lactic acid, 1.19–1.27 g/kg root; titratable acidity, 1.23–1.46 g/kg root, etc.) of lacto-juices prepared from non-boiled and fully-boiled sweet potato roots except β-carotene concentration [130 ± 7.5 mg/kg (fully-boiled roots) and 165 ± 8.1 mg/kg (non-boiled roots)]. The panelist evaluation scores ranged from 3–4.8 (in a hedonic scale of 1–5) from moderate liking to very much liking of sweet potato lacto-juice. Principal component analyses reduced the eight original analytical variables to three independent components (factors), which accounted for 99.9% of the total variations. Similarly, five original sensory variables were reduced to two independent components, which accounted for 83.1% of the total variations.

Key words:

Fermentation Lacto-juice Lactic acid Sweet potato 



The authors thank Dr S. Edison, Director of CTCRI, for valuable suggestions and facilities.


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Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  1. 1.Central Tuber Crops Research Institute (Regional Centre)PO: Dumduma Housing BoardBhubaneswarIndia

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