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Antioxidant Properties and Flavor Characteristics of Steamed Bread Fermented by Lactobacillus plantarum Isolated
from Traditional Sourdough

CHENG Xiaoyan1, SUN Yinfeng1, LIU Na1, HUANG Weining1,*, LI Ning2, FILIP Arnaut3   

  1. 1. State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China;
    2. Guangzhou Puratos Food Co. Ltd., Guangzhou 511400, China; 3. Putatos Group NV/SA, Brussels 1210, Belgium
  • Online:2015-06-25 Published:2015-06-12
  • Contact: HUANG Weining

Abstract:

In this study, steamed bread (ZLPS) fermented by Lactobacillus plantarum subsp. plantarum isolated from
traditional sourdough were studied for their antioxidant property and flavor characteristics. Common wheat steamed
bread (WS) and steamed bread (LPS) fermented by Lactobacillus plantarum Biogreen 300 were used as controls. The
antioxidant properties of the three samples were evaluated by total phenolic content (TPC) and 1,1-diphenyl-2-picrylhydrazyl
(DPPH) radical-scavenging ability while the flavor characteristics were determined using solid phase mictroextraction-gas
chromatography-mass spectrometry (SPME-GC-MS). The results showed that fermentation by Lactobacillus plantarum
subsp. plantarum isolated from traditional sourdough was able to significantly inhibit the decrease of antioxidant properties
of steamed bread samples caused by steaming. Compared to WS, the TPC of steamed bread fermented by Lactobacillus
plantarum subsp. plantarum was increased by 108.70%, while its DPPH radical-scavenging capacity was 13.65 times higher
than that of WS. The total content of volatile flavor compounds was increased by 53.11% for LPS and 56.92% for ZLPS,
respectively, suggesting enhanced flavor of the steamed breads. ZLPS also produced a number of unique flavor substances
such as iso-amyl acetate, 6-methyl-5-heptene-2-one, 3-octanol, 2-ethyl-1-hexanol, and acetic acid 2-phenylethyl ester.
Furthermore ZLPS showed the highest sensory evaluation scores.

Key words: traditional sourdough, steamed bread, antioxidant property, gas chromatography-mass spectrometry (GC-MS), principal component analysis (PCA)

CLC Number: