Adaptive evolution of the enigmatic Takakia now facing climate change in Tibet.
DNA repair
UV radiation
abiotic stress
adaptive evolution
development
fast-evolving genome
gene expansion
global warming
molecular clock
paleontology
Journal
Cell
ISSN: 1097-4172
Titre abrégé: Cell
Pays: United States
ID NLM: 0413066
Informations de publication
Date de publication:
17 08 2023
17 08 2023
Historique:
received:
30
06
2022
revised:
23
03
2023
accepted:
03
07
2023
medline:
21
8
2023
pubmed:
11
8
2023
entrez:
10
8
2023
Statut:
ppublish
Résumé
The most extreme environments are the most vulnerable to transformation under a rapidly changing climate. These ecosystems harbor some of the most specialized species, which will likely suffer the highest extinction rates. We document the steepest temperature increase (2010-2021) on record at altitudes of above 4,000 m, triggering a decline of the relictual and highly adapted moss Takakia lepidozioides. Its de-novo-sequenced genome with 27,467 protein-coding genes includes distinct adaptations to abiotic stresses and comprises the largest number of fast-evolving genes under positive selection. The uplift of the study site in the last 65 million years has resulted in life-threatening UV-B radiation and drastically reduced temperatures, and we detected several of the molecular adaptations of Takakia to these environmental changes. Surprisingly, specific morphological features likely occurred earlier than 165 mya in much warmer environments. Following nearly 400 million years of evolution and resilience, this species is now facing extinction.
Identifiants
pubmed: 37562403
pii: S0092-8674(23)00736-5
doi: 10.1016/j.cell.2023.07.003
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
3558-3576.e17Informations de copyright
Copyright © 2023 Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests The authors declare no competing interests.