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Microbial Community Dynamics and Metabolite Changes during Wheat Starch Slurry Fermentation.

Xiaoping Li1, Yujin Yang1, Xin Fan1

  • 1College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.

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Summary
This summary is machine-generated.

Fermenting wheat starch slurry with specific bacteria and fungi enhances Ganmianpi noodle quality. Optimal fermentation for two to three days improves texture and sensory attributes, providing insights for starter culture development.

Keywords:
HS-SPME/GC-MSmicrobial dynamicsnatural fermentationwheat starch

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Area of Science:

  • Food Microbiology
  • Fermentation Science
  • Noodle Technology

Background:

  • Ganmianpi, a traditional Chinese noodle, is produced from fermented wheat starch slurry.
  • Understanding microbial dynamics and metabolite changes during fermentation is crucial for quality control.

Purpose of the Study:

  • To investigate microbial population dynamics and metabolite changes in wheat starch fermentation slurry.
  • To evaluate the impact of fermentation on Ganmianpi texture and sensory properties.
  • To identify optimal fermentation times for Ganmianpi production.

Main Methods:

  • High-throughput sequencing for microbial analysis.
  • Headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME/GC-MS) for metabolite profiling.
  • Texture analysis and sensory evaluation of Ganmianpi.

Main Results:

  • Latilactobacillus curvatus and Leuconostoc citreum identified as dominant bacteria; Saccharomyces cerevisiae and Kazachstania wufongensis as main fungi.
  • Fermentation altered sugar content and increased titratable acidity, with nonvolatile acids dominating.
  • 62 volatile compounds identified, primarily alcohols and acids.
  • Fermentation improved Ganmianpi resilience and cohesiveness while reducing hardness and chewiness.
  • Ganmianpi fermented for 2-3 days received higher sensory scores.

Conclusions:

  • Wheat starch fermentation significantly influences Ganmianpi's microbial community, metabolites, and quality attributes.
  • Two to three days of fermentation yield superior Ganmianpi in terms of texture and sensory perception.
  • Findings provide a basis for developing starter cultures and improving Ganmianpi production.