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Related Concept Videos

Bacterial Phylum Firmicutes01:27

Bacterial Phylum Firmicutes

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Firmicutes is a diverse phylum of Gram-positive bacteria characterized by a low GC content in their genomes. This phylum includes organisms with monoderm or diderm cell envelopes, highlighting a complex evolutionary history. Firmicutes comprises several major orders, including Lactobacillales, Clostridiales, and Bacillales, which exhibit remarkable diversity in their morphology, metabolism, and ecological roles.The order Lactobacillales includes lactic acid bacteria, which are fermentative...
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The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
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Bacterial Phylum Bacteroidota01:26

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The phylum Bacteroidota includes over 700 species classified into four primary orders: Bacteroidales, Cytophagales, Flavobacteriales, and Sphingobacteriales. These gram-negative, non-sporulating rods exhibit saccharolytic capabilities and can be aerobic or fermentative, encompassing obligate aerobes, facultative aerobes, and obligate anaerobes. Many species display gliding motility, though some are nonmotile or use flagella. The genus Bacteroides is well-studied due to its significant role in...
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What is Evolutionary History?02:35

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Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
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The Evidence for Evolution02:55

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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
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Microbial matchmakers: Bifidobacterium evolution across animal hosts.

Phillip B Pope1, Gene W Tyson2

  • 1Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, QLD, Australia; Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway.

Cell Host & Microbe
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Summary
This summary is machine-generated.

Bifidobacteria, beneficial microbes, co-evolved with animal hosts. Their diversity and metabolic adaptations are shaped by evolutionary history, diet, and vertical transmission, impacting host health.

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Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Host-Microbe Interactions

Background:

  • Bifidobacteria are recognized as beneficial microbes with significant health associations.
  • Understanding the evolutionary dynamics of host-associated microbes is crucial for comprehending host health.

Purpose of the Study:

  • To investigate the co-evolutionary patterns of Bifidobacterium species across diverse animal hosts.
  • To identify the factors shaping the diversity and metabolic adaptations of Bifidobacteria within hosts.

Main Methods:

  • Phylogenetic analysis of Bifidobacterium genomes.
  • Comparative genomics to identify host-specific adaptations.
  • Reconstruction of evolutionary history based on host-microbe associations.

Main Results:

  • Bifidobacterium species exhibit significant diversity shaped by host evolutionary history.
  • Host-specific metabolic adaptations in Bifidobacteria are linked to diet and transmission modes.
  • Evidence of co-evolutionary trajectories between Bifidobacteria and various animal hosts.

Conclusions:

  • Bifidobacterium evolution is intricately linked to the evolutionary history of their animal hosts.
  • Diet and vertical transmission are key drivers of Bifidobacteria's adaptive radiation and host specificity.
  • These findings provide insights into the long-term interplay between beneficial microbes and host health.