Effect of cadmium on ferredoxin:NADP+ oxidoreductase activity

Grzyb, Joanna; Waloszek, Andrzej; Latowski, Dariusz; Więckowski, S.

doi:10.1016/j.jinorgbio.2004.04.004

Cited by 17 publications

(18 citation statements)

References 54 publications

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“…In contrast to copper, cadmium ions generate ROS species mainly by indirect reactions: by a reaction with electron transport chain proteins [61] or by a decrease of antioxidant enzymatic activity [62]. In our cultures, we did not observe any relationship between copper tolerance and the ability to maintain a high growth rate and efficiency of photosynthesis at high concentrations of Cd 2+ and Zn…”

Section: +contrasting

confidence: 60%

Copper excess-induced large reversible and small irreversible adaptations in a population of Chlamydomonas reinhardtii CW15 (Chlorophyta)

et al. 2018

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Two Chlamydomonas reinhardtii CW15 populations modified by an excess of copper in growth medium were obtained: a "Cu" population that was continuously grown under the selection pressure of 5 µM Cu 2+ (for at least 48 weeks) and the "Re" population, where a relatively short (9 week) exposure to elevated copper, necessary for acquiring tolerance, was followed by a prolonged period (at least 39 weeks) of cultivation at a normal (0.25 µM) copper concentration.Cells of the Cu population were able to multiply at a Cu 2+ concentration 16 times higher than that of the control population at a normal light intensity and at a Cu 2+ concentration 64 times higher when cultivated in dim light. The potential quantum yield of photosystem II (F V /F M ratio) under copper stress was also significantly higher for the Cu population than for Re and control populations.The Re population showed only residual tolerance towards the elevated concentration of copper, which is revealed by an F V /F M ratio slightly higher than in the control population under Cu 2+ stress in dim light or in darkness. We postulate that in the Chlamydomonas populations studied in this paper, at least two mechanisms of copper tolerance operate. The first mechanism is maintained during cultivation at a standard copper concentration and seems to be connected with photosynthetic apparatus. This mechanism, however, has only low adaptive value under excess of copper. The other mechanism, with a much higher adaptive value, is probably connected with Cu 2+ homeostasis at the cellular level, but is lost during cultivation at a normal copper concentration.

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Section: +contrasting

confidence: 60%

Copper excess-induced large reversible and small irreversible adaptations in a population of Chlamydomonas reinhardtii CW15 (Chlorophyta)

et al. 2018

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“…If this electron transport path would be inhibited by Cd 2+ ions, zeaxanthin epoxidation could also be inhibited. However, in vitro experiments [11] showed modification of ferredoxin activity by cadmium but this modification was not reversed zinc ions, therefore, it could not account for inhibition of zeaxanthin epoxidation observed in those experiments. Inactivation of FNR by cadmium was also observed in these studies and this inhibition was reversed by zinc.…”

Section: Discussionmentioning

confidence: 77%

“…The presence of cadmium generates oxidative stress, although this ion is unable to undergo one electron oxidoreduction reactions. It is well known that cadmium is phytotoxic, especially on long-term growth at very low concentrations (micromolar) but in the investigation of Cd effects on a single enzymatic reaction in plants, the applied Cd concentrations were often considerably higher [4,[9][10][11][12][13]. In spite of numerous experiments, the mechanism of Cd toxic action on plants has not been explained in detail so far.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of zeaxanthin epoxidase activity by cadmium ions in higher plants

Latowski

Kruk

Strzałka

2005

Journal of Inorganic Biochemistry

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“…It may replace Zn ions in metal-containing enzymes, such as carbonic anhydrase (Grzyb et al 2004) and Zn fingers, the DNA-binding proteins (Vallee et al 1991). It may replace Zn ions in metal-containing enzymes, such as carbonic anhydrase (Grzyb et al 2004) and Zn fingers, the DNA-binding proteins (Vallee et al 1991).…”

Section: Cadmium Stress Photosynthesis and Related Metabolismmentioning

confidence: 99%

Chloroplast and photosystems: Impact of cadmium and iron deficiency

et al. 2015

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Chloroplasts utilize photons from solar radiation to synthesize energy-rich molecules of ATPs and NADPHs, which are further used in active cellular processes. Multiprotein complexes (MPCs), including photosystems (PSII and PSI), and the cellular architecture responsible for generation of the proton motive force and the subsequent photophosphorylation, mediate the task of ATP and NADPH synthesis. Both photosystems and other multiprotein assemblies are embedded in thylakoid membranes. Advances in techniques used to study structural biology, biophysics, and comparative genomics and proteomics have enabled us to gain insights of structure, function, and localization of each individual component of the photosynthetic apparatus. An efficient coordination among MPCs is essential for normal functioning of photosynthesis, but there are various stressors that might directly or indirectly interact with photosynthetic components and processes. Cadmium is one of the toxic heavy metals that interact with photosynthetic components and damage photosystems and other MPCs in thylakoids. In plants, iron deficiency shows similar symptoms as those caused by Cd. Our article provides a general overview of chloroplast structure and a critical account of Cd-induced changes in photosystems and other MPCs in thylakoids, and suggests the possible mechanisms involved in mediating these changes. The connection between Cd-induced Fe-deficiency and the elevated Cd toxicity under the Fe-deficient condition was also discussed. inner membrane of chloroplast; TOC -translocons at outer membrane of chloroplast; BNP -blue native PAGE; SDS -sodium dodecylsulfate; PAGE -polyacrylamide gel electrophoresis; pmf -proton motive force; PMF -peptide mass fingerprinting; iTRAQ -isobaric tag for relative and absolute quantitation; CP -chloroplast.

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Effect of cadmium on ferredoxin:NADP+ oxidoreductase activity

Cited by 17 publications

References 54 publications

Copper excess-induced large reversible and small irreversible adaptations in a population of Chlamydomonas reinhardtii CW15 (Chlorophyta)

Copper excess-induced large reversible and small irreversible adaptations in a population of Chlamydomonas reinhardtii CW15 (Chlorophyta)

Inhibition of zeaxanthin epoxidase activity by cadmium ions in higher plants

Chloroplast and photosystems: Impact of cadmium and iron deficiency

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