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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...
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Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
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Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
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Related Experiment Video

Updated: Nov 29, 2025

Kinetic Visualization of Single-Cell Interspecies Bacterial Interactions
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Omics and interspecies interaction.

Bhumika Shokeen1, Marcia Dalila Botelho Dinis2, Farnoosh Haghighi1

  • 1Section of Periodontics, School of Dentistry, University of California at Los Angeles, Los Angeles, CA, USA.

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Microbial interactions shape biofilms, impacting health and disease. New tools are needed to understand these complex interspecies relationships and their roles in oral health.

Keywords:
interspecies interactionmetagenomicsoral biofilmsproteomicstranscriptomics

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Area of Science:

  • Microbiology
  • Biofilm research
  • Oral microbiome

Background:

  • Interspecies interactions are crucial for biofilm development, ecology, and architecture.
  • Microbial cellular responses (transcriptional, proteomic, metabolomic) dictate biofilm characteristics and health implications.
  • Omics technologies have advanced understanding of microbial communities but large-scale interaction analyses face challenges.

Purpose of the Study:

  • To highlight the importance of interspecies interactions in biofilms.
  • To identify the need for expanded tools to study these interactions.
  • To understand the implications of microbial interactions for oral health and disease.

Main Methods:

  • Focus on transcriptional and proteomic changes in co-cultured prominent species (e.g., Porphyromonas gingivalis, Streptococcus mutans, Candida albicans).
  • Leveraging advances in omics technologies.
  • Identifying current technical and bioinformatics limitations.

Main Results:

  • Current studies provide limited insight into individual microbial responses to co-habitants.
  • Studies often focus on a few key species and their interactions.
  • Technical and bioinformatics challenges hinder large-scale analysis of complex microbial communities.

Conclusions:

  • Expanded tools are essential for a profound understanding of interspecies biofilm dynamics.
  • Understanding these interactions is critical for addressing oral health and disease.
  • Further research is needed to elucidate the orchestration of cooperative, antagonistic, and other relationships within biofilms.