SHORT COMMUNICATION. The Effects of Copper and Zinc on the Fatty Acids and Carotenoids in the Marine Diatom Asterionella japonica

Gillan, F.T.; Fisher, Nicholas S.; Johns, R. B.

doi:10.1515/botm.1983.26.5.255

Cited by 5 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lower UI of Fe-replete T. oceanica cells could be a result of the greater abundance of SFAs in these cells, a possible indication of increased energy for SFA synthesis. In the marine diatom Asterionella japonica desaturation of 16:0 to 16:1v9 was found to be affected by copper but not by zinc (Gillan et al 1983); the ratio of 16:0 to 16:1 was also significantly affected by Fe in the diatom T. oceanica (p 5 0.029; Table 3). Toxic concentrations of cadmium and mercury also reduced production of EPA in Asterionella glacialis (Jones et al 1987), and toxic concentrations of zinc decreased production of 18:4 in the freshwater chlorophyte Selenastrum capricornutum (McLarnon-Riches et al 1998).…”

Section: Discussionmentioning

confidence: 97%

Influence of iron on fatty acid and sterol composition of marine phytoplankton and copepod consumers

Chen

Wakeham

Fisher

2011

Limnology & Oceanography

View full text Add to dashboard Cite

We conducted laboratory experiments to determine the influence of iron on the fatty acid (FA) and sterol composition of the diatom Thalassiosira oceanica, the cryptophyte Rhodomonas salina, the prymnesiophyte Isochrysis galbana, and the copepod Acartia tonsa that fed on these algae. Algal cells were cultured with no added Fe or with Fe added at 100 nmol L 21 . Fe-deficient culture medium resulted in lower growth rates, cell volumes, and photosynthetic efficiencies for all algal species. The total mass of FA per cell was 2.2-3

show abstract

Section: Discussionmentioning

confidence: 97%

Influence of iron on fatty acid and sterol composition of marine phytoplankton and copepod consumers

Chen

Wakeham

Fisher

2011

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Zinc inhibited the biosynthesis of fucoxanthin in Asterionella japonica grown for 8 d in 60/~g Zn 1-1 (Gillan et al 1983). Zinc has been shown to decrease production of photosynthetic pigments in other species.…”

Section: Discussionmentioning

confidence: 97%

“…The mechanisms of toxicity of ionic zinc and copper to N. closterium were compared.synthesis (Gillan et al 1983). Although 65/~g Zn 1-a halved the cell division rate, photosynthesis and respiration were unaffected by zinc concentrations up to 500 pg Zn 1-1.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Mechanism of toxicity of zinc to the marine diatomNitzschia closterium

Stauber

Florence

1990

Mar. Biol.

View full text Add to dashboard Cite

The effect of zinc on cell division, photosynthesis, ultrastructure, respiration, ATP levels, mitochondrial electron-transport chain (ETC)-activity, total thiols and glutathione in the marine diatom Nitzsehia elosterium (Ehrenberg) W. Smith was investigated. Although 65/~g Zn 1-a halved the cell division rate, photosynthesis and respiration were unaffected by zinc concentrations up to 500 pg Zn 1-1. Most of the zinc associated with the cells was bound at the cell surface, with only 3 to 4% of this extracellular zinc penetrating the cell membrane. Once inside the cell, zinc exerted its toxicity at a number of sites. Increased ATP production and ETC activity were observed in zinc-treated cells. Zinc also enhanced cellular thiols (SH) and total glutathione, and zinc toxicity was reversible by the addition of thiol compounds such as cysteine. Zinc-thiol binding may be a detoxification mechanism for the cell. It is suggested that increased ATP production may provide the energy required for increased glutathione synthesis at the expense of other energy-requiring processes including cell division. The mechanisms of toxicity of ionic zinc and copper to N. closterium were compared.synthesis (Gillan et al. 1983). Despite these studies, our understanding of the mechanism of ionic zinc toxicity to marine phytoplankton remains poor.In this paper we examine the effect of zinc on cell division, photosynthesis, ultrastructure, respiration, ATP levels, ETC activity, total thiols and glutathione in the marine diatom Nitzschia closterium (Ehrenberg) W. Smith. We also compare the mechanisms of zinc and copper toxicity to this species, and the reversal of toxicity by sulfhydryl compounds. Materials and methods Algae culturesThe unicellular marine diatom Nitzsehia closterium (Ehrenberg) W Smith (Hasle 1964) was cultured axenically in Mediumf(Guillard and Ryther 1962) with the trace elements and iron concentration halved. The culture was maintained on a 12 h light:12 h dark cycle (Philips TL 40 W fluorescent white, 6400 lux) at 21 °C. Cells in log-phase growth were used for all experiments.

show abstract

Fatty acid profiling as bioindicator of chemical stress in marine organisms: A review

Filimonova

Gonçalves

Marques

et al. 2016

Ecological Indicators

141

View full text Add to dashboard Cite

SHORT COMMUNICATION. The Effects of Copper and Zinc on the Fatty Acids and Carotenoids in the Marine Diatom Asterionella japonica

Cited by 5 publications

References 9 publications

Influence of iron on fatty acid and sterol composition of marine phytoplankton and copepod consumers

Influence of iron on fatty acid and sterol composition of marine phytoplankton and copepod consumers

Mechanism of toxicity of zinc to the marine diatomNitzschia closterium

Fatty acid profiling as bioindicator of chemical stress in marine organisms: A review

Contact Info

Product

Resources

About