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Plant Evolutionary Ecology Lab
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A lab that explores the origin of sex, in the form of sperm and eggs, through marine green algae.
AboutAbout the lab
Why are sperm and eggs so different?
The Plant Evolutionary Ecology Lab studies the evolutionary mechanisms that gave rise to gametes of different sizes, such as sperm and eggs.
Anisogamy is thought to have driven the evolution of sexual dimorphism in form and behavior.
Sperm, which are small and produced in large numbers, compete for eggs, which are large and produced in small numbers, and this gives rise to sexual selection.
Using marine green algae, the lab traces the evolutionary pathway through multiple approaches: theory, empirical study, and molecular mechanisms.
Key terms
- Gamete
- A reproductive cell that fuses in fertilization to form the next generation. In animals, these are sperm and eggs
- Anisogamy
- A mode of fertilization between two types of gametes of different sizes. The combination of sperm and egg is the typical example
- Sexual selection
- An evolutionary mechanism in which advantageous traits are selected generation after generation through competition for mating partners
ResearchResearch themes
The lab studies why gamete size split into sperm and eggs as a central question in evolutionary biology. Taking advantage of how easy marine green algae are to work with, it approaches the evolutionary mechanism from theory, empirical study, and molecular mechanisms.
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MembersFaculty
- ProfessorTatsuya Togashi
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Sea lettuce in Brofjorden 1 - cropped” W.carter / CC0 (cropped)
- Evolutionary mechanisms behind the split into sperm and eggs: “Sperm-egg” 作者不詳 / Public domain (cropped)
- Related lab (Animal Evolutionary Ecology Lab): “Hermit crab with a shell on a sandy bottom at night” Dmitry Domrin / CC BY 4.0 (cropped)
- Related lab (Biomolecular Dynamics Lab (Takano Lab)): “Indian Muntjac fibroblast cells ( )” ZEISS Microscopy from Germany / CC BY 2.0 (cropped)
- Related lab (Epigenome Structure and Dynamics Lab (Osakabe Lab)): “Arabidopsis Thaliana planted in Laboratory” Jucember / CC BY-SA 3.0 (cropped)
- Related lab (Chromatin Metabolism Regulation Lab (Ura-Sassa Lab)): “Nucleosome 1KX5 2” By Richard Wheeler (Zephyris) 2005. / CC BY-SA 3.0 (cropped)
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