Oxidative Stress Tolerance Strategies of Intertidal Macroalgae

Aguilera, José; Rautenberger, Ralf

doi:10.1002/9781444345988.ch4

Cited by 12 publications

(6 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This might compromise cellular health and integrity (Aguilera and Rautenberger, 2010) depending on the severity and the ability of the repair mechanisms to cope in an organism (Mukherjee, 2008). In the case of asymbiotic octocorals they respond to thermal stress by attempting to enzymatically quench the dangerous ROS (e.g.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Octocorals in a changing environment: Seasonal response of stress biomarkers in natural populations of Veretillum cynomorium

Madeira

Vinagre

et al. 2015

Journal of Sea Research

View full text Add to dashboard Cite

Section: Accepted Manuscriptmentioning

confidence: 99%

Octocorals in a changing environment: Seasonal response of stress biomarkers in natural populations of Veretillum cynomorium

Madeira

Vinagre

et al. 2015

Journal of Sea Research

View full text Add to dashboard Cite

“…In this study, contents of soluble phlorotannins were related to the antioxidant capacity of extracts, which has been reported for both Antarctic and temperate brown macroalgae . When seaweeds are exposed to abiotic stress such as high temperatures and UV radiation protective mechanisms can be activated to protect cells against oxidative damage , which could include not only phenolic compounds but also various antioxidant enzymes. In general, due to high concentrations of phlorotannins in Arctic brown macroalgae, ROS‐scavenging via antioxidant enzymes can become less relevant compared to other algal groups .…”

Section: Discussionmentioning

confidence: 63%

“…To keep the level of damages to photosynthetic and other cellular components by oxidative stress low, macroalgae have different antioxidant mechanisms such as increasing activities of ROS‐scavenging enzymes ( e.g . superoxide dismutase, ascorbate peroxidase), synthesizing antioxidants such as ascorbate and glutathione, and can regenerate metabolites efficiently to avoid deficiencies in antioxidant reactions .…”

Section: Introductionmentioning

confidence: 99%

Stress Tolerance of the Endemic Antarctic Brown Alga Desmarestia anceps to UV Radiation and Temperature is Mediated by High Concentrations of Phlorotannins

Flores-Molina

Rautenberger

Muñoz

et al. 2016

Photochem & Photobiology

Self Cite

View full text Add to dashboard Cite

The endemic Antarctic brown macroalga Desmarestia anceps is strongly shade-adapted, but shows also a high capacity to cope with different environmental stressors, e.g. UV radiation and temperature. Therefore, this species colonizes wide depth gradients, which are characterized by changing environmental conditions. In this study, we examine whether the different physiological abilities allowing D. anceps to grow across a wide depth range is determined by high levels of phlorotannins. Photosynthesis, measured by PAM-fluorometry, the contents of soluble phlorotannins, antioxidant capacities of field grown were analyzed in response to different conditions of radiation (PAR and PAR + UV) and temperature (2, 7 and 12°C). The results show that maximal quantum of fluorescence (Fv /Fm ) decreased with increasing doses of UV radiation, but remained unaffected by temperature. High levels of soluble phlorotannins were detected and confirmed by microscopic observation revealing the abundance of large physodes. Exposure to UV radiation and elevated temperature showed that phlorotannins were not inducible by UV but increased at 12°C. ROS scavenging capacity was positively correlated with the contents of phlorotannins. In general, highest contents of phlorotannins were correlated with the lowest inhibition of Fv /Fm in all experimental treatments, highlighting the UV-protective role of these compounds in D. anceps.

show abstract

“…Biochemical biomarkers, mainly related with energy metabolism and oxidative stress, have been widely used as efficient tools to detect and monitor environmental variations and fitness costs (Huggett et al, 1992;Tonn et al, 2016;Silva et al, 2016;Kamyab et al, 2017). The exposure to environmental stressors may induce the formation of free radicals, contributing to the cellular vulnerability of organisms through lipid peroxidation (LPO) and/or DNA damage (Aguilera and Rautenberger, 2010;Lesser, 2011). To maintain cellular integrity, a set of antioxidant enzymes, including catalase (CAT) and superoxide dismutase (SOD), prevent the formation and/or remove these reactive metabolites (Abele and Puntarulo, 2004), while isocitrate and lactate dehydrogenase are associated with shifts on energetic metabolism, from aerobic to anaerobic, respectively (Huggett et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Sand smelt ability to cope and recover from ocean's elevated CO2 levels

Silva

Lemos

Faria³

et al. 2018

Ecotoxicology and Environmental Safety

View full text Add to dashboard Cite

Considered a major environmental concern, ocean acidification has induced a recent research boost into effects on marine biodiversity and possible ecological, physiological, and behavioural impacts. Although the majority of literature indicate negative effects of future acidification scenarios, most studies are conducted for just a few days or weeks, which may be insufficient to detect the capacity of an organism to adjust to environmental changes through phenotypic plasticity. Here, the effects and the capacity of sand smelt larvae Atherina presbyter to cope and recover (through a treatment combination strategy) from short (15 days) and long-term exposure (45 days) to increasing pCO levels (control: ~515 μatm, pH = 8.07; medium: ~940 μatm, pH = 7.84; high: ~1500 μatm, pH = 7.66) were measured, addressing larval development traits, behavioural lateralization, and biochemical biomarkers related with oxidative stress and damage, and energy metabolism and reserves. Although behavioural lateralization was not affected by high pCO exposure, morphometric changes, energetic costs, and oxidative stress damage were impacted differently through different exposures periods. Generally, short-time exposures led to different responses to either medium or high pCO levels (e.g. development, cellular metabolism, or damage), while on the long-term the response patterns tend to become similar between them, with both acidification scenarios inducing DNA damage and tending to lower growth rates. Additionally, when organisms were transferred to lower acidified condition, they were not able to recover from the mentioned DNA damage impacts. Overall, results suggest that exposure to future ocean acidification scenarios can induce sublethal effects on early life-stages of fish, but effects are dependent on duration of exposure, and are likely not reversible. Furthermore, to improve our understanding on species sensitivity and adaptation strategies, results reinforce the need to use multiple biological endpoints when assessing the effects of ocean acidification on marine organisms.

show abstract

Oxidative Stress Tolerance Strategies of Intertidal Macroalgae

Cited by 12 publications

References 40 publications

Octocorals in a changing environment: Seasonal response of stress biomarkers in natural populations of Veretillum cynomorium

Octocorals in a changing environment: Seasonal response of stress biomarkers in natural populations of Veretillum cynomorium

Stress Tolerance of the Endemic Antarctic Brown Alga Desmarestia anceps to UV Radiation and Temperature is Mediated by High Concentrations of Phlorotannins

Sand smelt ability to cope and recover from ocean's elevated CO2 levels

Contact Info

Product

Resources

About