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Updated: Apr 4, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Endosymbiotic theories for eukaryote origin.

William F Martin¹, Sriram Garg², Verena Zimorski²

¹Institute for Molecular Evolution, Universität Düsseldorf, Universitätsstraße 1, Düsseldorf 40225, Germany bill@hhu.de.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences

|September 2, 2015

Summary

This summary is machine-generated.

Endosymbiotic theories explain eukaryotic cell evolution, highlighting mitochondria

Keywords:

anaerobes endosymbiosis eukaryotes mitochondria nucleus plastids

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Area of Science:

Cell Biology
Evolutionary Biology

Background:

Endosymbiotic theories have long explained eukaryotic cell origins.
Over 20 theories exist for eukaryote and mitochondria origins.
Few models address eukaryotic anaerobes or energetic constraints.

Purpose of the Study:

To survey and contrast endosymbiotic theories for eukaryote, mitochondria, and nucleus origins.
To highlight the role of energy in prokaryote-to-eukaryote transition.
To introduce the facultative anaerobe host for plastid origin.

Main Methods:

Literature review and synthesis of endosymbiotic theories.
Analysis of energetic constraints on cell evolution.
Comparison of theoretical predictions with observational data.

Main Results:

Eukaryotic complexity required mitochondria for bioenergetics, explaining the lack of intermediates.
Archaea are now considered the likely host for endosymbiosis.
The host for plastid origin was likely a facultative anaerobe.

Conclusions:

Endosymbiotic theory, particularly involving archaea, is crucial for understanding eukaryote evolution.
Energetic capabilities provided by mitochondria were essential for eukaryotic complexity.
The origin of plastids involved a facultative anaerobic host.