Cadmium- and chromium-induced damage and acclimation mechanisms in Scenedesmus quadricauda and Chlorella sorokiniana

Волгушева, А. А.; Todorenko, D. A.; Baizhumanov, A. A.; Чивкунова, О. Б.; Solovchenko, Alexei; Antal, Taras K.

doi:10.1007/s10811-022-02747-6

Cited by 8 publications

(3 citation statements)

References 53 publications

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“…Table 1 shows the MDA and FRAP of CTR and hND-40 samples at the T0 point (before MV addition) and after 3 h of incubation with 3 µM MV under growth PPFD (T3). At the T0 point, both control and hND-pretreated cultures showed relatively low levels of MDA (1.7–1.8 µmol/g DW) and FRAP (0.2 mmol Fe(II)eq/g DW), which were consistent with those found in the algal cells under optimal growth conditions [ 41 ]. Exposure of cells to MV resulted in a significant increase in both oxidative stress markers, but hND-pretreated cultures showed lower MDA and FRAP levels at T3 compared to the control cells.…”

Section: Resultssupporting

confidence: 67%

“…The degree of MV-induced oxidative stress in hND-40 samples, in which hND pre-incubation showed a clear protective effect, alleviating the F V /F M decrease ( Figure 5 b), was evaluated by assessing malondialdehyde (MDA) content and ferric-reducing antioxidant power (FRAP) in the cells. MDA and FRAP were used as indicators of lipid peroxidation (membrane integrity) and non-enzymatic antioxidant capacity of the cells, respectively [ 40 , 41 ]. Table 1 shows the MDA and FRAP of CTR and hND-40 samples at the T0 point (before MV addition) and after 3 h of incubation with 3 µM MV under growth PPFD (T3).…”

Section: Resultsmentioning

confidence: 99%

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Nanodiamond Particles Reduce Oxidative Stress Induced by Methyl Viologen and High Light in the Green Alga Chlamydomonas reinhardtii

Antal

Волгушева

Baizhumanov

et al. 2023

IJMS

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Widely used in biomedical and bioanalytical applications, the detonation nanodiamonds (NDs) are generally considered to be biocompatible and non-toxic to a wide range of eukaryotic cells. Due to their high susceptibility to chemical modifications, surface functionalisation is often used to tune the biocompatibility and antioxidant activity of the NDs. The response of photosynthetic microorganisms to redox-active NDs is still poorly understood and is the focus of the present study. The green microalga Chlamydomonas reinhardtii was used to assess the potential phytotoxicity and antioxidant activity of NDs hosting hydroxyl functional groups at concentrations of 5–80 μg NDs/mL. The photosynthetic capacity of microalgae was assessed by measuring the maximum quantum yield of PSII photochemistry and the light-saturated oxygen evolution rate, while oxidative stress was assessed by lipid peroxidation and ferric-reducing antioxidant capacity. We demonstrated that hydroxylated NDs might reduce cellular levels of oxidative stress, protect PSII photochemistry and facilitate the PSII repair under methyl viologen and high light associated stress conditions. Factors involved in this protection may include the low phytotoxicity of hydroxylated NDs in microalgae and their ability to accumulate in cells and scavenge reactive oxygen species. Our findings could pave the way for using hydroxylated NDs as antioxidants to improve cellular stability in algae-based biotechnological applications or semi-artificial photosynthetic systems.

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Section: Resultssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

Nanodiamond Particles Reduce Oxidative Stress Induced by Methyl Viologen and High Light in the Green Alga Chlamydomonas reinhardtii

Antal

Волгушева

Baizhumanov

et al. 2023

IJMS

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“…Cadmium has been shown to affect growth [ 4 ], reproduction, physiological and biochemical processes in microalgae [ 5 ]. For example, cadmium affects photosynthesis, leads to chloroplasts and mitochondria damage, upregulates antioxidant capacity, and alters cellular ultrastructure [ 6 , 7 ]. However, the same heavy metal has different effects on algal cell growth and metabolism.…”

Section: Introductionmentioning

confidence: 99%

Cadmium-Induced Physiological Responses, Biosorption and Bioaccumulation in Scenedesmus obliquus

Xu,

Tu,

et al. 2024

Toxics

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Cadmium ion (Cd2+) is a highly toxic metal in water, even at low concentrations. Microalgae are a promising material for heavy metal remediation. The present study investigated the effects of Cd2+ on growth, photosynthesis, antioxidant enzyme activities, cell morphology, and Cd2+ adsorption and accumulation capacity of the freshwater green alga Scenedesmus obliquus. Experiments were conducted by exposing S. obliquus to varying concentrations of Cd2+ for 96 h, assessing its tolerance and removal capacity towards Cd2+. The results showed that higher concentrations of Cd2+ (>0.5 mg L−1) reduced pigment content, inhibited algal growth and electron transfer in photosynthesis, and led to morphological changes such as mitochondrial disappearance and chloroplast deformation. In this process, S. obliquus counteracted Cd2+ toxicity by enhancing antioxidant enzyme activities, accumulating starch and high-density granules, and secreting extracellular polymeric substances. When the initial Cd2+ concentration was less than or equal to 0.5 mg L−1, S. obliquus was able to efficiently remove over 95% of Cd2+ from the environment through biosorption and bioaccumulation. However, when the initial Cd2+ concentration exceeded 0.5 mg L−1, the removal efficiency decreased slightly to about 70%, with biosorption accounting for more than 60% of this process, emerging as the predominant mechanism for Cd2+ removal. Fourier transform infrared correlation spectroscopy analysis indicated that the carboxyl and amino groups of the cell wall were the key factors in removing Cd2+. In conclusion, S. obliquus has considerable potential for the remediation of aquatic environments with Cd2+, providing algal resources for developing new microalgae-based bioremediation techniques for heavy metals.

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Importance of different exposure routes on the toxicity of chromium to planktonic organisms

Vieira,

Rodgher,

Haneda

et al. 2023

Aquat Ecol

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Cadmium- and chromium-induced damage and acclimation mechanisms in Scenedesmus quadricauda and Chlorella sorokiniana

Cited by 8 publications

References 53 publications

Nanodiamond Particles Reduce Oxidative Stress Induced by Methyl Viologen and High Light in the Green Alga Chlamydomonas reinhardtii

Nanodiamond Particles Reduce Oxidative Stress Induced by Methyl Viologen and High Light in the Green Alga Chlamydomonas reinhardtii

Cadmium-Induced Physiological Responses, Biosorption and Bioaccumulation in Scenedesmus obliquus

Importance of different exposure routes on the toxicity of chromium to planktonic organisms

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