Related Experiment Video
Updated: Jan 20, 2026
05:53
Labeling of Blood Vessels in the Teleost Brain and Pituitary Using Cardiac Perfusion with a DiI-fixative
Published on: June 13, 2019
8.0K
An intriguing relationship between teleost Rex3 retroelement and environmental temperature
Federica Carducci1, Maria Assunta Biscotti1, Mariko Forconi1
1Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy.
Biology Letters
|September 5, 2019
Summary
Transposable elements (TEs) like Rex3 retroelements in teleost fish show distinct sequence evolution based on environmental temperature. This study reveals Rex3 variants cluster by water temperature, linking genome evolution to climate adaptation.
Area of Science:
- Genomics
- Evolutionary Biology
- Molecular Biology
Background:
- Transposable elements (TEs) significantly shape host genomes, influencing architecture and size.
- TEs are sensitive to environmental changes, but their sequence evolution in response to conditions like temperature is poorly understood.
- Teleost fish, with diverse environmental adaptations and rich TE content, offer a model for studying TE-environment correlations.
Purpose of the Study:
- To investigate the correlation between environmental temperature and the sequence evolution of the Rex3 retroelement in teleost fish.
- To determine if Rex3 retroelement variants cluster based on the adaptation of teleost species to different thermal environments.
Main Methods:
- Phylogenetic analysis of partial reverse transcriptase sequences from the Rex3 retroelement.
- Comparative sequence analysis across 39 teleost species representing diverse thermal habitats.
Main Results:
- Rex3 retroelement sequences from teleost species inhabiting cold waters clustered together.
- Rex3 retroelement sequences from teleost species inhabiting warm waters also showed distinct clustering.
- This suggests a correlation between Rex3 retroelement sequence evolution and environmental temperature.
Conclusions:
- The study provides the first evidence linking environmental temperature to the evolutionary patterns of the Rex3 retroelement in teleosts.
- Rex3 retroelement variants may evolve in response to thermal adaptation, highlighting TEs as indicators of environmental influence on genome evolution.
Related Concept Videos
05:53Labeling of Blood Vessels in the Teleost Brain and Pituitary Using Cardiac Perfusion with a DiI-fixative
8.0K
The article describes a quick protocol for labeling blood vessels in a teleost fish by cardiac perfusion of DiI diluted in fixative, using medaka (Oryzias latipes) as a model and focusing on brain and pituitary...
8.0K
02:12Relationship Formation
45.2K
What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
45.2K
01:28Ending Relationships
172
The dissolution of intimate relationships presents complex emotional and psychological challenges, particularly when emotional bonds are strong, the relationship is long-standing, and perceived alternatives are limited. This distress often intensifies in romantic breakups, where the initiator may experience greater turmoil than the rejected partner. Contributing factors include residual attachment, guilt over causing pain, and uncertainty about how to manage the situation. The stress is further...
172
05:31Gonadectomy and Blood Sampling Procedures in the Small Size Teleost Model Japanese Medaka (Oryzias latipes)
5.0K
The article describes a quick protocol to gonadectomize and sample blood from the small teleost fish, using Japanese medaka (Oryzias latipes) as a model, to investigate the role of sex steroids in animal physiology.
5.0K
01:27Relationship Growth
208
Interpersonal relationships progress through stages, beginning with awareness and moving toward mutuality, where emotional connections deepen. While many relationships remain at moderate levels of mutuality, deeper connections form through self-disclosure, trust, and interdependence.Self-DisclosureSelf-disclosure involves revealing personal information, starting with surface-level details and gradually progressing to more intimate content. As trust grows, individuals feel more comfortable...
208
02:55Temperature Dependence on Reaction Rate
88.6K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
88.6K