Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals.
The acid-base relevant molecules carbon dioxide (CO2 ), protons (H+ ), and bicarbonate (HCO3 - ) are substrates and end products of some of the most essential physiological functions including aerobic and anaerobic respiration, ATP hydrolysis, photosynthesis, and calcification. The structure and fun...
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ftcdlib:oai:escholarship.org/ark:/13030/qt3rx9d9x0 2023-05-15T17:51:52+02:00 Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. Tresguerres, Martin Clifford, Alexander M Harter, Till S Roa, Jinae N Thies, Angus B Yee, Daniel P Brauner, Colin J 449 - 465 2020-07-01 application/pdf https://escholarship.org/uc/item/3rx9d9x0 unknown eScholarship, University of California qt3rx9d9x0 https://escholarship.org/uc/item/3rx9d9x0 public Journal of experimental zoology. Part A, Ecological and integrative physiology, vol 333, iss 6 Animals Fishes Invertebrates Acid-Base Equilibrium Hydrogen-Ion Concentration Biological Evolution acid trapping hypoxia ocean acidification oxygen transport symbiosome article 2020 ftcdlib 2021-05-08T18:04:15Z The acid-base relevant molecules carbon dioxide (CO2 ), protons (H+ ), and bicarbonate (HCO3 - ) are substrates and end products of some of the most essential physiological functions including aerobic and anaerobic respiration, ATP hydrolysis, photosynthesis, and calcification. The structure and function of many enzymes and other macromolecules are highly sensitive to changes in pH, and thus maintaining acid-base homeostasis in the face of metabolic and environmental disturbances is essential for proper cellular function. On the other hand, CO2 , H+ , and HCO3 - have regulatory effects on various proteins and processes, both directly through allosteric modulation and indirectly through signal transduction pathways. Life in aquatic environments presents organisms with distinct acid-base challenges that are not found in terrestrial environments. These include a relatively high CO2 relative to O2 solubility that prevents internal CO2 /HCO3 - accumulation to buffer pH, a lower O2 content that may favor anaerobic metabolism, and variable environmental CO2 , pH and O2 levels that require dynamic adjustments in acid-base homeostatic mechanisms. Additionally, some aquatic animals purposely create acidic or alkaline microenvironments that drive specialized physiological functions. For example, acidifying mechanisms can enhance O2 delivery by red blood cells, lead to ammonia trapping for excretion or buoyancy purposes, or lead to CO2 accumulation to promote photosynthesis by endosymbiotic algae. On the other hand, alkalinizing mechanisms can serve to promote calcium carbonate skeletal formation. This nonexhaustive review summarizes some of the distinct acid-base homeostatic mechanisms that have evolved in aquatic organisms to meet the particular challenges of this environment. Article in Journal/Newspaper Ocean acidification University of California: eScholarship |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Animals Fishes Invertebrates Acid-Base Equilibrium Hydrogen-Ion Concentration Biological Evolution acid trapping hypoxia ocean acidification oxygen transport symbiosome |
spellingShingle |
Animals Fishes Invertebrates Acid-Base Equilibrium Hydrogen-Ion Concentration Biological Evolution acid trapping hypoxia ocean acidification oxygen transport symbiosome Tresguerres, Martin Clifford, Alexander M Harter, Till S Roa, Jinae N Thies, Angus B Yee, Daniel P Brauner, Colin J Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
topic_facet |
Animals Fishes Invertebrates Acid-Base Equilibrium Hydrogen-Ion Concentration Biological Evolution acid trapping hypoxia ocean acidification oxygen transport symbiosome |
description |
The acid-base relevant molecules carbon dioxide (CO2 ), protons (H+ ), and bicarbonate (HCO3 - ) are substrates and end products of some of the most essential physiological functions including aerobic and anaerobic respiration, ATP hydrolysis, photosynthesis, and calcification. The structure and function of many enzymes and other macromolecules are highly sensitive to changes in pH, and thus maintaining acid-base homeostasis in the face of metabolic and environmental disturbances is essential for proper cellular function. On the other hand, CO2 , H+ , and HCO3 - have regulatory effects on various proteins and processes, both directly through allosteric modulation and indirectly through signal transduction pathways. Life in aquatic environments presents organisms with distinct acid-base challenges that are not found in terrestrial environments. These include a relatively high CO2 relative to O2 solubility that prevents internal CO2 /HCO3 - accumulation to buffer pH, a lower O2 content that may favor anaerobic metabolism, and variable environmental CO2 , pH and O2 levels that require dynamic adjustments in acid-base homeostatic mechanisms. Additionally, some aquatic animals purposely create acidic or alkaline microenvironments that drive specialized physiological functions. For example, acidifying mechanisms can enhance O2 delivery by red blood cells, lead to ammonia trapping for excretion or buoyancy purposes, or lead to CO2 accumulation to promote photosynthesis by endosymbiotic algae. On the other hand, alkalinizing mechanisms can serve to promote calcium carbonate skeletal formation. This nonexhaustive review summarizes some of the distinct acid-base homeostatic mechanisms that have evolved in aquatic organisms to meet the particular challenges of this environment. |
format |
Article in Journal/Newspaper |
author |
Tresguerres, Martin Clifford, Alexander M Harter, Till S Roa, Jinae N Thies, Angus B Yee, Daniel P Brauner, Colin J |
author_facet |
Tresguerres, Martin Clifford, Alexander M Harter, Till S Roa, Jinae N Thies, Angus B Yee, Daniel P Brauner, Colin J |
author_sort |
Tresguerres, Martin |
title |
Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
title_short |
Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
title_full |
Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
title_fullStr |
Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
title_full_unstemmed |
Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
title_sort |
evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals. |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/3rx9d9x0 |
op_coverage |
449 - 465 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Journal of experimental zoology. Part A, Ecological and integrative physiology, vol 333, iss 6 |
op_relation |
qt3rx9d9x0 https://escholarship.org/uc/item/3rx9d9x0 |
op_rights |
public |
_version_ |
1766159149144473600 |