Interval Nutrient Pulses Responses of Compatitive Culture Experiment: Chaetoceros Sp. Thallassiosira allenii (Takano), Gomphosphaeria Sp.

Sisman-Aydin, Goknur

doi:10.3923/javaa.2012.799.802

Cited by 2 publications

(1 citation statement)

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“…However, in the series containing <2 mg L -1 Cd, intercellular Cd's higher than those adsorbed on cell surface can be caused by the growth strategy of T. allenii species to adjust itself to Cd. The previous study reveals that the species increases its nutrient uptake quota by increasing its growth rate and biovolume for adaptation to nutrient pulse periods within range of 12-96 hours (Şişman Aydın, 2012). The more cadmium concentration in the medium, the more adsorbed-intracellular Cd difference increased (P<0.05), which means that much of the cadmium was removed by its uptake into the cell at all cadmium concentrations (≤10 mg L -1 ).…”

Section: Resultsmentioning

confidence: 99%

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Oral

2013

Turk. J. Fish. Aquat. Sci.

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The present study achieved cadmium bioaccumulation ability using growth kinetics and ICP-OES for Cd measurements in marine diatom Thalassiosira allenii Takano. T. allenii cells were exposed to different cadmium concentrations (0.5, 1, 2, 5, 10, 25, 50, 75, ) for 4 days. T. allenii cells were seen to have bioaccumulation ability both in cells and cellular surfaces. The cadmium uptake of T. allenii species followed a linear trend for most of days for ≤ 25 mg L -1 Cd concentrations while the cell growth was inhibited at concentrations of >25 mg L -1 Cd. T. allenii removed much of cadmium by taking it into the cells in ≤10 mg. L -1Cd concentrations in the medium. While the adsorption on the cell surfaces is dominant in cells on the first day, the amount of Cd allowed in the cell has become dominant beginning with the second day. The growth rate decreased with increasing Cd concentration and remained stable at about 0.1-0.2 day -1 . However up to the 5 mg. L -1Cd concentration, the growth rates are not different from the control and continued for about 0.3-0.4 day -1 . When T. allenii species is used in the bioremediation systems, this limit value does not affect growth of the species.

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Section: Resultsmentioning

confidence: 99%