Transcriptomics of the Anthopleura Sea Anemone Reveals Unique Adaptive Strategies to Shallow‐Water Hydrothermal Vent DOI Creative Commons
Mei‐Fang Lin, Li‐Lian Liu, Chen‐Tung Arthur Chen

et al.

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(4)

Published: April 1, 2025

The nonsymbiotic sea anemone Anthopleura nigrescens dominates the shallow-water hydrothermal vents off coast of Kueishan Island, Taiwan. These represent some world's most extreme environments, with recorded pH values as low 1.52 and temperatures reaching 121°C. To investigate adaptations A. to these conditions, transcriptomic analyses were conducted compare populations inhabiting vent non-vent areas. identify shared genetic mechanisms in vent-dwelling anemones, specific orthologs conserved anemones identified by comparing genomic data species other anemones. Tank experiments elevated also performed evaluate expression profiles genes associated heat resistance. analysis revealed that enriched are involved H2S homeostasis stress resistance, suggesting detoxification thermal resistance critical adaptive strategies. Two significantly upregulated encoding hydroxyacylglutathione hydrolase thiosulfate sulfurtransferase may play a role managing sulfur toxicity maintaining redox balance. vent-specific gene patterns suggest efficient DNA repair crucial populations. Interestingly, circadian rhythms populations, help adapt highly dynamic conditions vents. Furthermore, stress-resistance-related reveal have developed unique molecular regulatory cope temperatures, observed tank experiment. findings advance our understanding life environments.

Language: Английский

The energy-efficient reductive tricarboxylic acid cycle drives carbon uptake and transfer to higher trophic levels within the Kueishantao shallow-water hydrothermal system DOI Creative Commons
Joely Maak, Yu‐Shih Lin, Enno Schefuß

et al.

Biogeosciences, Journal Year: 2025, Volume and Issue: 22(7), P. 1853 - 1863

Published: April 15, 2025

Abstract. Chemoautotrophic Campylobacteria utilize the reductive tricarboxylic acid (rTCA) cycle for carbon uptake, a metabolic pathway that is more energy-efficient and discriminates less against 13C than Calvin–Benson–Bassham cycle. Similar to other hydrothermal systems worldwide, dominate microbial community of shallow-water system off Kueishantao (Taiwan). Compound-specific stable isotope analyses lipid-derived fatty acids were performed understand importance rTCA transfer fixed higher trophic levels in vent area. Of these, C16:1ω7c, C18:1ω7c, C18:1ω9c strongly enriched 13C, indicating activity utilizing Campylobacteria. Isotopic fractionation was close 0 ‰, likely caused by pH values as low 2.88. Characteristic present not only fluids but also adjacent sediments water filters 20 m away from orifice, albeit with decreasing abundance diluted signal. Furthermore, δ13C analysis tissue Xenograpsus testudinatus, crab endemic this particular system, identified chemosynthetically carbon. This highlights interrelationship between chemoautotrophic life opportunities organisms under environmentally harsh conditions at systems.

Language: Английский

Citations

0
Low high-temperature tolerance of the hydrothermal vent crab Xenograpsus testudinatus: Thermal biochemistry, survival rate and histological analyses, and habitat investigations DOI
Li‐Chun Tseng, Huirong Chen, Chi Chou

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 970, P. 179001 - 179001

Published: March 1, 2025

Language: Английский

Citations

0
Transcriptomics of the Anthopleura Sea Anemone Reveals Unique Adaptive Strategies to Shallow‐Water Hydrothermal Vent DOI Creative Commons
Mei‐Fang Lin, Li‐Lian Liu, Chen‐Tung Arthur Chen

et al.

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(4)

Published: April 1, 2025

The nonsymbiotic sea anemone Anthopleura nigrescens dominates the shallow-water hydrothermal vents off coast of Kueishan Island, Taiwan. These represent some world's most extreme environments, with recorded pH values as low 1.52 and temperatures reaching 121°C. To investigate adaptations A. to these conditions, transcriptomic analyses were conducted compare populations inhabiting vent non-vent areas. identify shared genetic mechanisms in vent-dwelling anemones, specific orthologs conserved anemones identified by comparing genomic data species other anemones. Tank experiments elevated also performed evaluate expression profiles genes associated heat resistance. analysis revealed that enriched are involved H2S homeostasis stress resistance, suggesting detoxification thermal resistance critical adaptive strategies. Two significantly upregulated encoding hydroxyacylglutathione hydrolase thiosulfate sulfurtransferase may play a role managing sulfur toxicity maintaining redox balance. vent-specific gene patterns suggest efficient DNA repair crucial populations. Interestingly, circadian rhythms populations, help adapt highly dynamic conditions vents. Furthermore, stress-resistance-related reveal have developed unique molecular regulatory cope temperatures, observed tank experiment. findings advance our understanding life environments.

Language: Английский

Citations

0