| RRC ID |
57625
|
| 著者 |
Zhang Z, Qu C, Yao R, Nie Y, Xu C, Miao J, Zhong B.
|
| タイトル |
The Parallel Molecular Adaptations to the Antarctic Cold Environment in Two Psychrophilic Green Algae.
|
| ジャーナル |
Genome Biol Evol
|
| Abstract |
Psychrophilic green algae from independent phylogenetic lines thrive in the polar extreme environments, but the hypothesis that their psychrophilic characteristics appeared through parallel routes of molecular evolution remains untested. The recent surge of transcriptome data enables large-scale evolutionary analyses to investigate the genetic basis for the adaptations to the Antarctic extreme environment, and the identification of the selective forces that drive molecular evolution is the foundation to understand the strategies of cold adaptation. Here, we conducted transcriptome sequencing of two Antarctic psychrophilic green algae (Chlamydomonas sp. ICE-L and Tetrabaena socialis) and performed positive selection and convergent substitution analyses to investigate their molecular convergence and adaptive strategies against extreme cold conditions. Our results revealed considerable shared positively selected genes and significant evidence of molecular convergence in two Antarctic psychrophilic algae. Significant evidence of positive selection and convergent substitution were detected in genes associated with photosynthetic machinery, multiple antioxidant systems, and several crucial translation elements in Antarctic psychrophilic algae. Our study reveals that the psychrophilic algae possess more stable photosynthetic apparatus and multiple protective mechanisms and provides new clues of parallel adaptive evolution in Antarctic psychrophilic green algae.
|
| 巻・号 |
11(7)
|
| ページ |
1897-1908
|
| 公開日 |
2019-7-1
|
| DOI |
10.1093/gbe/evz104
|
| PII |
5491838
|
| PMID |
31106822
|
| PMC |
PMC6628873
|
| MeSH |
Acclimatization
Adaptation, Physiological / genetics
Adaptation, Physiological / physiology
Antarctic Regions
Chlorophyta / classification
Chlorophyta / genetics*
Cold Temperature
Photosynthesis / genetics
Photosynthesis / physiology
Phylogeny
Transcriptome / genetics
|
| IF |
3.726
|
| 引用数 |
4
|
| リソース情報 |
| 藻類 |
NIES-691 |
