Effect of Radionuclides and Trace Elements on Antioxidant System of Brown Seaweeds

Akakçe, Nurdan; Görgün, Aysun Uğur; Kızılkaya, İnci Tüney; Atay, Nevra Öztürk

doi:10.1007/s00128-022-03677-2

Cited by 4 publications

(2 citation statements)

References 59 publications

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“…Authors recommended use of both types of algae to assess these oxidative stress biomarkers on the Chilean coast, although they presented inter-specific differences. In a bay in Turkey, other researchers found that one type of brown algae activates the activities of SOD and CAT under concentrations of manganese (Mn) and radionuclide 210 Po better that other brown algae, suggesting that the former species could be used to understand the antioxidant mechanisms in both metals and radionuclides (Akakçe et al, 2023). Maharana et al (2010) collected samples of Padina tetrastromatica on the centralwestern coast of India and found elevated levels of LPO and hydrogen peroxide, along with high ASC, CAT, and GST activities.…”

Section: Levels Of Ros and Antioxidant Defenses Have Been Usedmentioning

confidence: 99%

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Montenegro

2024

Ecotoxicol. Environ. Contam.

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Marine habitats are under threat from the continued release of contaminants into waterways, and monitoring becomes crucialto future management decisions and regulations to protect these environments. A key aspect of this monitoring is the choiceof a marine species that is able to cope with this pollution, and the tolerant species exhibit more relevant ecological responses.These species-responses are called biomarkers of tolerance and are tested using a variety of measurements that reflect exposureto chemicals. Marine brown macroalgae can be found in a wide range of marine environments, including those with high metalpollution and they are widely used in monitoring programs. Mechanisms of tolerance are vital to the survival of this group ofmacroalgae in polluted habitats, but these mechanisms have not yet been reviewed. The aim of this critical review article isto summarize the historical information available regarding metal tolerance in marine brown macroalgae. We review studiesabout tolerance mechanisms in marine brown macroalgae exposed to metals, conducted both under experimental conditionsand in the field. Also, bibliometric analyses are used to identify the most relevant investigations, country contributions andgaps in knowledge on the topic. Results showed that the principal extracellular tolerance mechanisms described for marinebrown macroalgae are physical exclusion, exudated ligands, and metal-binding to the cell wall. Epiphytic microorganismswere also found to be capable of accumulating a given metal. Internally, metallothioneins and phytochelatins were importantchelators; furthermore, antioxidant responses may increase metal tolerance. Omics analyses were used to reveal the internalmechanisms used by these macroalgae. Biomarkers of tolerance have occasionally been used in monitoring studies, providingadditional information regarding tolerance to complex chemical mixtures found in the field. Future studies should make use ofthese biomarkers to improve our understanding of metal-tolerance strategies.

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Section: Levels Of Ros and Antioxidant Defenses Have Been Usedmentioning

confidence: 99%

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Montenegro

2024

Ecotoxicol. Environ. Contam.

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“…Studies on algae under various stresses have shown that the antioxidant system, the signal transduction system, the heat shock protein response system, the ubiquitinprotease degradation system, and other functional factors all play an important role in the process of different stresses [1][2][3][4]. Algae often activate the antioxidant systems in response to stress, including antioxidant enzymes that comprise superoxide dismutase, glutathione reductase, catalases, ascorbate peroxidase, and non-enzymatic components that comprise ascorbate, flavonoids, carotenoids, glutathione, tocopherols, and phenols, which can respond to alleviate the damage of free radicals in the early stages of stress [5][6][7]. The presence of the ubiquitin-proteasome pathway is also considered to be an important strategy used to cope with these abiotic stresses.…”

Section: Introductionmentioning

confidence: 99%

Expression Profiling Reveals the Possible Involvement of the Ubiquitin–Proteasome Pathway in Abiotic Stress Regulation in Gracilariopsis lemaneiformis

Qin,

Shui,

et al. 2023

IJMS

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Gracilariopsis lemaneiformis is an economically important red macroalga, the cultivation of which is affected by abiotic stresses. This research intends to study the response mechanism of various components of the ubiquitin-protease pathway to abiotic stress in G. lemaneiformis. The algae were treated with five common external stresses (high temperature, low temperature, O3, PEG, and water shortage) to study the macroscopic and microscopic manifestations of the ubiquitin–proteasome pathway. Firstly, the changes in soluble protein and ubiquitin were detected during the five treatments, and the results showed that the content of soluble protein and ubiquitin significantly increased under most stresses. The content of the soluble protein increased the most on the second day after 20% PEG treatment, which was 1.38 times higher than that of the control group, and the content of ubiquitin increased the most 30 min after water shortage treatment, which was 3.6 times higher than that of the control group. Then, 12 key genes (E1, E2, UPL1, HRD1, UFD1, Cul3, Cul4, DDB2, PIAS1, FZR1, APC8, and COP1) of the ubiquitin–proteasome pathway were studied, including an estimation of the probably regulatory elements in putative promoter regions and an analysis of transcript levels. The results showed that CAAT box, LTR, GC motif, and MBS elements were present in the putative promoter regions, which might have endowed the genes with the ability to respond to stress. The transcript analysis showed that under high temperature, low temperature, PEG, O3, and water shortage, all of the genes exhibited instant and significant up-regulation, and different genes had different response levels to different stresses. Many of them also showed the synergistic effect of transcript up-regulation under various stress treatments. In particular, E1, E2, Cul3, Cul4, UPL1, HRD1, and COP1 performed most significantly under the five stresses. Collectively, our exploration of the ubiquitin–proteasome pathway and the transcript levels of key genes suggest a significant role to cope with adversity, and potential candidate genes can be selected for transformation to obtain stress-resistant strains.

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Health Risk Assessment and Mineral Contents in Brown Seaweed Colpomenia sinuosa for Human Consumption

Türker,

Ak,

Taş

2024

Thalassas

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Effect of Radionuclides and Trace Elements on Antioxidant System of Brown Seaweeds

Cited by 4 publications

References 59 publications

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Expression Profiling Reveals the Possible Involvement of the Ubiquitin–Proteasome Pathway in Abiotic Stress Regulation in Gracilariopsis lemaneiformis

Health Risk Assessment and Mineral Contents in Brown Seaweed Colpomenia sinuosa for Human Consumption

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