An indirect method for the rapid estimation of carotenoid contents in Phaeodactylum tricornutum: Possible application to other marine algae

1977 ◽  
Vol 40 (2) ◽  
pp. 109-116 ◽  
Author(s):  
J. I. Carreto ◽  
J. A. Catoggio
Keyword(s):  
Phaeodactylum Tricornutum ◽  
Indirect Method ◽  
Marine Algae ◽  
Rapid Estimation

Comparative toxicity of nano ZnO and bulk ZnO towards marine algae Tetraselmis suecica and Phaeodactylum tricornutum

2017 ◽  
Vol 24 (7) ◽  
pp. 6543-6553 ◽  
Author(s):  
Jiji Li ◽  
Simona Schiavo ◽  
Gabriella Rametta ◽  
Maria Lucia Miglietta ◽  
Vera La Ferrara ◽  
...  
Keyword(s):  
Phaeodactylum Tricornutum ◽  
Marine Algae ◽  
Tetraselmis Suecica ◽  
Nano Zno ◽  
Comparative Toxicity

Occurrence of Dimethyl-β-Propiothetin in Marine Phytoplankton

1966 ◽  
Vol 23 (3) ◽  
pp. 357-364 ◽  
Author(s):  
R. G. Ackman ◽  
C. S. Tocher ◽  
J. McLachlan
Keyword(s):  
Phaeodactylum Tricornutum ◽  
Marine Algae ◽  
Degradation Products ◽  
Skeletonema Costatum ◽  
Marine Phytoplankton ◽  
Dimethyl Sulphide ◽  
Ecological Significance ◽  
Wet Weight ◽  
Cyclotella Cryptica

Dimethyl-β-propiothetin has been reported from several species of freshwater and marine multicellular algae. Cultures of 14 species of unicellular marine algae were treated with cold aqueous alkali. Dimethyl sulphide was liberated from Syracosphaera carterae, Skeletonema costatum, Amphidinium carteri, Phaeodactylum tricornutum, Tetraselmis sp. and Cyclotella cryptica, and is assumed to arise from dimethyl-β-propiothetin. The amounts of alkali-labile material varied, on a wet weight basis, from 0.07 to 2.9% (as thetin salt) in different organisms. The presence of the thetin in S. carterae was confirmed by other means. The thetin, and particularly its degradation products, acrylic acid and dimethyl sulphide, may influence actual fishing operations and also affect the quality of fishery products. The metabolic and ecological significance of these materials are reviewed and discussed.

Production of antibacterial activities by two Bacillariophyceae grown in dialysis culture

1983 ◽  
Vol 29 (3) ◽  
pp. 338-341 ◽  
Author(s):  
Sam Cooper ◽  
Aviva Battat ◽  
Pierre Marsot ◽  
Michel Sylvestre
Keyword(s):  
Phaeodactylum Tricornutum ◽  
Marine Algae ◽  
Skeletonema Costatum ◽  
Antibacterial Activities ◽  
Gram Negative Bacteria ◽  
High Cell ◽  
Direct Relation ◽  
Algal Extracts ◽  
Time Of Harvest ◽  
Dialysis Culture

Using a dialysis culture system for marine algae which allows for the recovery of high cell yield, we detected in the aqueous phase of the algal extracts an active component which inhibited gram-negative bacteria. Results show a direct relation between cell growth phase at time of harvest and the activity observed. It was possible to confirm previous results whereby Bacillariophyceae produce lipophilic substances inhibiting gram-positive terrestrial and marine bacteria. These findings corroborate the observation that Skeletonema costatum is more active man Phaeodactylum tricornutum against Staphyloccoci.

scholarly journals Toxicity of environmentally important micropollutants on three trophic levels

2022 ◽  
Vol 5 (1) ◽  
pp. 20-28
Author(s):  
Hilal Yılmaz ◽  
Gülsen Avaz ◽  
Ülkü Yetiş ◽  
Melek Özkan
Keyword(s):  
Danio Rerio ◽  
Aquatic Ecosystems ◽  
Phaeodactylum Tricornutum ◽  
Marine Algae ◽  
Environmental Problem ◽  
Trophic Levels ◽  
Toxic Chemical ◽  
Chemical Substances ◽  
Toxic Chemical Substances ◽  
Higher Sensitivity

Micropollution is a serious environmental problem caused by continuous entry of trace quantities of toxic chemical substances into the aquatic environment. In the present study, three trophic levels of the aquatic ecosystems were used to evaluate the acute toxicities of environmentally important micropollutants including heavy metals, pesticides and drugs. There is a scarcity of information on toxicity of the studied substances on marine water algae. Among studied micropollutants, the most toxic chemical to Daphnia magna and Danio rerio was found to be 1-Chloro-2,4 dinitrobenzene with EC50 of 0.002 and 4.2 mg/L, respectively. Although this compound was also toxic to marine algae, Phaeodactylum tricornutum, arsenic showed the highest toxicity to the algae with EC50 of 2.4 mg/L. As compared to other organisms, D. magna was found to have higher sensitivity to all of the tested micropollutants.

Effects of temperature and salinity on growth and uptake of 65Zn and 137Cs for six marine algae

1976 ◽  
Vol 56 (1) ◽  
pp. 13-20 ◽  
Author(s):  
C. E. Styron ◽  
T. M. Hagan ◽  
D. R. Campbell ◽  
J. Harvin ◽  
N. K. Whittenburg ◽  
...  
Keyword(s):  
Population Growth ◽  
Phaeodactylum Tricornutum ◽  
Marine Algae ◽  
Dunaliella Salina ◽  
Response Surfaces ◽  
Regression Coefficients ◽  
Radionuclide Concentration ◽  
Independent Variable ◽  
Concentration Factors ◽  
Effects Of Temperature

Population growth and concentration factors for 65Zn and 137Cs have been measured for Achnanthes brevipes Agardh, Carteria sp. Diesing, Chlamydomonas sp. Ehrenberg, Dunaliella salina Teod., Nannochloris atotnus Butcher, and Phaeodactylum tricornutum Lewin subjected to factorial combinations of eight temperatures (6–40 °C) and ten salinities (3.5–44.0 p.p.t.). Regression coefficients were calculated for polynomial models describing response surfaces for growth and radionuclide concentration. Salinity was more important than temperature in describing population growth for Carteria, Dunaliella, Nannochloris and Phaeodactylum. No independent variable was consistently of primary importance in describing 137Cs concentration factors, while temperature accounted for more variation in 65Zn concentration factors than salinity or population growth in all algae except Dunaliella. Concentration factors for 65Zn were uniformly higher than 137Cs concentration factors.

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