Effect of heating and probiotic fermentation on the phytochemical content and antioxidant potential of edible Irish brown seaweeds
-
Shilpi Gupta
and
Gaurav Rajauria
Abstract
Probiotic fermentation was conducted on two species of edible Irish brown seaweeds, Saccharina latissima and Laminaria digitata as a sole source of nutrition for the bacteria. Seaweeds were heat treated followed by fermentation with the probiotic Lactobacillus rhamnosus. Kinetics of cell growth, acid production, and sugar consumption were examined. The effects of heating and fermentation on the changes in total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity were also monitored. Lactobacillus rhamnosus grew well on both the seaweed species and reached nearly 10 log cfu ml-1 after 16–24 h of fermentation; however, the specific growth rate was 1.5 times higher on S. latissima. Lactic acid was the major product of the fermentation, followed by acetic acid. Heat treatment resulted in a 50–64.4% reduction in TPC and TFC for both the seaweeds concomitant with a leaching of phytochemicals into the water used for heating. Subsequently, fermentation resulted in 28% and 37.6% increases in the TPC and 1.18- and 2.04-fold increases in TFC for S. latissima and Lam. digitata, respectively, with a simultaneous increase in the antioxidant activity as well. Changes in the TPC and TFC were represented by zero-, first-, or second-order kinetic models. Fourier transform infrared analysis of the seaweeds as well as the broth revealed the presence of polyphenolic signals at different ranges.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Masthead
- Research Articles
- Phytoplankton assemblage patterns in the southern Mid-Atlantic Bight
- A checklist of marine fungi of Taiwan with a description of Kitesporella keelungensis gen. et sp. nov
- First report of the alien brown alga Botrytella parva (Takamatsu) H.-S. Kim (Chordariaceae, Phaeophyceae) from the eastern Mediterranean Sea
- Molecular systematic reassessment of Sargassum (Fucales, Phaeophyceae) in Korea using four gene regions
- Deep-water macroalgal-dominated coastal detritic assemblages on the continental shelf off Mallorca and Menorca (Balearic Islands, Western Mediterranean)
- The photosynthetic characteristics of red coralline algae, determined using pulse amplitude modulation (PAM) fluorometry
- Effects of ocean acidification on different life-cycle stages of the kelp Laminaria hyperborea (Phaeophyceae)
- Effect of heating and probiotic fermentation on the phytochemical content and antioxidant potential of edible Irish brown seaweeds
- Seasonal variation in the polyamines of Ecklonia maxima
- Short communication
- The invasive seaweed Sargassum filicinum (Fucales, Phaeophyceae) is on the move along the Mexican Pacific coastline
