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The mayfly Neocloeon triangulifer senses decreasing oxygen availability (PO2) and responds by reducing ion uptake and altering gene expression.
J Exp Biol
December 2024
Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA.
Oxygen availability is central to the energetic budget of aquatic animals and may vary naturally and/or in response to anthropogenic activities. Yet, we know little about how oxygen availability is linked to fundamental processes such as ion transport in aquatic insects. We hypothesized and observed that ion (22Na and 35SO4) uptake would be significantly decreased at O2 partial pressures below the mean critical level (Pcrit, 5.
View Article and Find Full Text PDFAbstractFreshwater salinity regimes vary naturally and are changing in response to anthropogenic activities. Few insect species tolerate saline waters, and biodiversity losses are associated with increasing salinity in freshwater. We used radiotracers (Na, SO, and Ca) to examine ion uptake rates across concentration gradients in mayflies (Ephemeroptera), caddis flies (Trichoptera), and mosquitoes (Diptera) and made observations for some traits in seven other taxa representing mayflies, stone flies (Plecoptera), true flies (Diptera), and true bugs (Hemiptera).
View Article and Find Full Text PDFIn vivo protein turnover rates in varying oxygen tensions nominate MYBBP1A as a mediator of the hyperoxia response.
Sci Adv
December 2023
Institute of Cardiovascular Disease, Gladstone Institutes, San Francisco, CA, USA.
Article Synopsis
- Oxygen deprivation and excess are both toxic, making the body's adaptation to oxygen levels crucial for survival.
- The study investigates protein turnover rates in mouse heart, lung, and brain under different oxygen levels, finding that the lung shows the most significant response.
- It highlights that certain extracellular matrix proteins stabilize in the lung during both low (hypoxia) and high (hyperoxia) oxygen, while a component of the electron transport chain becomes unstable in high oxygen, implicating MYBBP1A as a regulator in this context.
Salinity-induced ionoregulatory changes in the gill proteome of the mayfly, Neocloeon triangulifer.
Environ Pollut
January 2023
Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA. Electronic address:
Ecologists have observed declines in the biodiversity of sensitive freshwater organisms in response to increasing concentrations of major ions (salinization). Yet, how changing salinities physiologically challenge aquatic organisms, such as mayflies, remains remarkably understudied. Moreover, it is not well understood the degree to which species respond and acclimate to salinity changes.
View Article and Find Full Text PDFThe acclimatory response of the mayfly to dilute conditions is linked to the plasticity of sodium transport.
Proc Biol Sci
July 2022
Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA.
Relative to a growing body of knowledge about the negative consequences of freshwater salinization, little is known about how aquatic insects respond to progressively ion-poor conditions. Here, we examined life-history and physiological acclimation in by rearing nymphs from 1-day post-egg hatch to adulthood across a gradient of decreasing Na concentrations (15, 8, 4, 2 and 1 mg l Na). We found no significant changes in survival, growth, development time and whole-body Na content across these treatments.
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