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Related Concept Videos

Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...
Sulfur Assimilation01:20

Sulfur Assimilation

Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
Diversity of Protists II01:27

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
Microbial Interactions: Mutualism01:25

Microbial Interactions: Mutualism

Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through this...
Microbial Interactions: Cooperation01:26

Microbial Interactions: Cooperation

Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...

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Related Experiment Video

Updated: Jun 30, 2026

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community
11:28

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Published on: May 28, 2007

Honor thy symbionts.

Jian Xu1, Jeffrey I Gordon

  • 1Department of Molecular Biology and Pharmacology, Washington University School of Medicine, St. Louis, MO 63110, USA.

Proceedings of the National Academy of Sciences of the United States of America
|August 19, 2003
PubMed
Summary
This summary is machine-generated.

This study explores the complex gut microbiome, revealing how beneficial bacteria, like Bacteroides thetaiotaomicron, aid postnatal gut development and host health through co-evolved symbiotic relationships.

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Gas Chromatography-Mass Spectrometry-Based Targeted Metabolomics of Hard Coral Samples
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Related Experiment Videos

Last Updated: Jun 30, 2026

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community
11:28

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Published on: May 28, 2007

Obtaining Hemocytes from the Hawaiian Bobtail Squid Euprymna scolopes and Observing their Adherence to Symbiotic and Non-Symbiotic Bacteria
05:29

Obtaining Hemocytes from the Hawaiian Bobtail Squid Euprymna scolopes and Observing their Adherence to Symbiotic and Non-Symbiotic Bacteria

Published on: February 11, 2010

Gas Chromatography-Mass Spectrometry-Based Targeted Metabolomics of Hard Coral Samples
09:01

Gas Chromatography-Mass Spectrometry-Based Targeted Metabolomics of Hard Coral Samples

Published on: October 13, 2023

Area of Science:

  • Microbiology
  • Gastroenterology
  • Host-Microbiome Interactions

Background:

  • The human intestine harbors a complex microbial community crucial for health.
  • Understanding host-bacterial symbiosis in the gut is vital for deciphering physiological functions.

Purpose of the Study:

  • To elucidate the molecular basis of beneficial symbiotic relationships in the gut.
  • To investigate the role of specific microbes in postnatal gut development and host physiology.

Main Methods:

  • Utilizing germ-free mouse models colonized with defined microbial communities.
  • Comparing the genomes of intestinal microbiota members.
  • Employing interdisciplinary studies on the intestinal environment's effects on microbial genomes.

Main Results:

  • Symbionts significantly contribute to postnatal gut development and host physiology.
  • Microorganisms have evolved sophisticated strategies to maintain symbiotic alliances.
  • The human-Bacteroides thetaiotaomicron symbiosis serves as a key example.

Conclusions:

  • Interdisciplinary research offers new insights into microbe-human co-evolution.
  • Understanding gut symbiosis provides perspectives on the foundations of human health.