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Related Concept Videos

Microbes in the Production of Fermented Foods01:27

Microbes in the Production of Fermented Foods

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Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
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Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

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Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
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Microbes in Food Production01:29

Microbes in Food Production

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Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
21
Production of Organic Acids01:25

Production of Organic Acids

24
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
24
Evolutionary Processes in Microbes01:26

Evolutionary Processes in Microbes

29
Microbial evolution occurs rapidly due to short generation times and a variety of genetic processes, including horizontal gene transfer, mutation, recombination, and genetic drift. These mechanisms collectively enable microbes to adapt swiftly to changing environments.Horizontal gene transfer (HGT) allows genes to move between different species and occurs through three main mechanisms: conjugation, transformation, and transduction. Conjugation involves direct cell-to-cell contact for DNA...
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Microbial Fermentation01:23

Microbial Fermentation

1.9K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
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Related Experiment Video

Updated: Mar 25, 2026

The Cultivation, Growth, and Viability of Lactic Acid Bacteria: A Quality Control Perspective
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[Microevolution of lactic acid bacteria--A review].

Yuqin Song, Zhihong Sun, Heping Zhang

    Wei Sheng Wu Xue Bao = Acta Microbiologica Sinica
    |February 27, 2016
    PubMed
    Summary

    Microevolution studies of lactic acid bacteria (LAB) utilize advanced molecular techniques like multilocus sequence typing (MLST) and whole-genome sequencing. These methods reveal genetic diversity and population structures, enhancing our understanding of LAB functions.

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    Area of Science:

    • Microbiology and Molecular Biology
    • Food Science and Technology

    Context:

    • Lactic acid bacteria (LAB) are crucial in the food industry.
    • Understanding LAB microevolution aids in deciphering their biological functions and mechanisms.
    • Molecular biology advancements have introduced powerful tools for studying microbial evolution.

    Purpose:

    • To elucidate the principles, methods, and significance of researching LAB microevolution.
    • To introduce the application of whole-genome sequencing in LAB microevolution studies.
    • To provide new insights for future research directions in LAB population genetics.

    Summary:

    • Multilocus sequence typing (MLST) is a widely adopted method for analyzing LAB genetic diversity and population structure.
    • Whole-genome sequencing (WGS) offers increasing advantages for microevolution research due to declining costs.
    • This review covers the foundational aspects and modern applications of genomic techniques in LAB microevolution.

    Impact:

    • Facilitates a deeper understanding of LAB genetic diversity and population dynamics.
    • Highlights the utility of whole-genome sequencing for microbial evolutionary studies.
    • Offers a foundation for future research into LAB functional genomics and industrial applications.