endosymbiotic

(adjective)

that lives within a body or cells of another organism

Related Terms

Examples of endosymbiotic in the following topics:

  • Endosymbiosis and the Evolution of Eukaryotes

    • Endosymbiotic events probably contributed to the origin of the last common ancestor (LCA) of today's eukaryotes.
    • The endosymbiotic theory was first articulated by the Russian botanist Konstantin Mereschkowski in 1905.
    • Ivan Wallin extended the idea of an endosymbiotic origin to mitochondria in the 1920s.
    • The endosymbiotic theory was advanced and substantiated with microbiological evidence by Lynn Margulis in 1967 .
    • The possibility that the peroxisome organelles may have an endosymbiotic origin has also been considered, although they lack DNA.

  • The Evolution of Plastids

    • Molecular and morphological evidence suggest that the chlorarachniophyte protists are derived from a secondary endosymbiotic event.
    • In fact, it appears that chlorarachniophytes are the products of a recent (on the scale of evolution) secondary endosymbiotic event.
    • The hypothesized process of endosymbiotic events leading to the evolution of chlorarachniophytes is shown.
    • In a primary endosymbiotic event, a heterotrophic eukaryote consumed a cyanobacterium.
    • In a secondary endosymbiotic event, the cell resulting from primary endosymbiosis was consumed by a second cell.

  • Endosymbiotic Theory and the Evolution of Eukaryotes

    • Scientists believe the ultimate event in HGT (horizontal gene transfer) occurs through genome fusion between different species when two symbiotic organisms become endosymbiotic.
    • Using DNA analysis and a new mathematical algorithm called conditioned reconstruction (CR), it has been proposed that eukaryotic cells developed from an endosymbiotic gene fusion between two species: one an Archaea and the other a Bacteria.
    • An endosymbiotic fusion event would clearly explain this observation.
    • More recent work proposes that gram-negative bacteria, which are unique within their domain in that they contain two lipid bilayer membranes, did result from an endosymbiotic fusion of archaeal and bacterial species .
    • The theory that mitochondria and chloroplasts are endosymbiotic in origin is now widely accepted.

  • Microbes and the Origin of Life on Earth

    • This evidence is described in the endosymbiotic theory.
    • The endosymbiotic theory describes how a large host cell and ingested bacteria could easily become dependent on one another for survival, resulting in a permanent relationship.

  • Genome Reduction

    • Obligate endosymbiotic species are characterized by a complete inability to survive outside their host environment.
    • This model illustrates four general features of reduced genomes and obligate intracellular species: ‘genome streamlining' resulting from relaxed selection on genes that are superfluous in the intracellular environment; a bias towards deletions (rather than insertions), which heavily affects genes that have been disrupted by accumulation of mutations (pseudogenes); very little or no capability for acquiring new DNA; and considerable reduction of effective population size in endosymbiotic populations, particularly in species that rely on vertical transmission.

  • Mitochondria

    • There are two hypotheses about the origin of mitochondria: endosymbiotic and autogenous, but the most accredited theory at present is endosymbiosis.
    • The endosymbiotic hypothesis suggests mitochondria were originally prokaryotic cells, capable of implementing oxidative mechanisms.

  • Alphaproteobacteria

    • (See endosymbiotic theory.).

  • Sea Coral and Sea Anemone Zooxanthellae

    • The genus Symbiodinium encompasses the largest and most prevalent group of endosymbiotic dinoflagellates known to science.

  • Chromalveolata: Stramenopiles

    • Current evidence suggests that chromalveolates have an ancestor which resulted from a secondary endosymbiotic event.
    • This red algal cell had previously evolved chloroplasts from an endosymbiotic relationship with a photosynthetic prokaryote.

  • Ocean Floor

    • Chloroplasts are considered to be endosymbiotic cyanobacteria, a group of bacteria that are thought to be the origins of aerobic photosynthesis.