What extreme physiologies does the painted turtle genome encode?
The western painted turtle genome informs evolution of extreme anoxia and freeze tolerance in a slowly evolving vertebrate lineage.
Source
The western painted turtle genome, a model for the evolution of extreme physiological adaptations in a slowly evolving lineage
Study at a glance
- Design
- Computational / modelling — Genome assembly and comparative analyses with supporting anoxia RNA-seq
- N
- N=1 · Chrysemys picta bellii reference genome; RNA-seq from n = 4 turtles per normoxic/anoxic group (16 libraries)
- Population
- Western painted turtle (Chrysemys picta bellii)
- Outcome
- Genome of a slowly evolving, anoxia- and freeze-tolerant tetrapod providing a model for extreme physiological adaptations
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What extreme physiologies does the painted turtle genome encode?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
What extreme tolerances are highlighted?
anoxia-tolerant tetrapods known, and have the capacity in some species to freeze nearly solid, thaw, and survive with negligible tissue damage.
What does the genome provide?
The western painted turtle genome harbors a wealth of information on the genetic basis of these and other adaptations that characterize this unique vertebrate lineage.
What they did
Sequenced/analyzed Chrysemys picta genome in the context of anoxia and freeze-survival physiology.
What they found
Genome resources for one of the most anoxia-tolerant tetrapods, capable of freezing nearly solid then thawing with little damage; molecular adaptations for winter survival.
The limits
What it doesn't show
Does not by itself map every protective pathway experimentally.
Key terms
- Anoxia tolerance
- Surviving without oxygen.
- Freeze tolerance
- Surviving extracellular freezing then thawing.
- Western painted turtle
- Chrysemys picta model for extreme physiology.
- Overwintering
- Surviving winter in nests/habitats with harsh conditions.
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Extreme traits
Common questions
Extreme traits?
Anoxia and freeze tolerance.
Freeze outcome?
Nearly solid freeze, thaw, survive.
Why genome?
Genetic basis of adaptations.
Seasonal context?
Winter hatchling survival.
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