Thalassiosira oceanica

Maldonado MT, Price NM. Reduction and transport of organically bound iron by Thalassiosira oceanica (Bacillariophyceae). J. Phycol. 2001 37 298-309. 

Figure 9 The relationship between the intracellular Fe/C ratio as a function of the inorganic iron concentration, [Fe ], for three diatoms species, Thalassiosira oceanica (O) an oceanic species (O), and two coastal species Thalassiosira weissflogii, and Thalassiosira pseudonana (O) (source Sunda and Huntsman, 1995a).

Studies have also been carried out on other essential trace metals such as zinc (Sunda and Huntsman, 1992,1995b), and similar relationships between Zn/C and [Zn ] have been observed. In studies with the diatom Thalassiosira oceanica, the Zn/C (p.molmoU ) ratio varied from 0.2 at... 

Figure 10.11. Regulation of cellular manganese concentration as a function of pMn in Thalassiosira oceanica. Uptake follows Michaelis-Menten kinetics. With decreasing [Mn " ], increases in at constant K, allow cells to maintain relatively constant cellular Mn concentrations. (Data from Sunda and Huntsman, 1985.)...

Figure 10.12. Biological uptake of Zn and its regulation. (Selection of data adapted from Sunda and Huntsman, 1992.) (a) Specific growth rates of coastal (Thalassiosira weissflogii, ) and oceanic Thalassisira oceanica, /) algal species as functions of log[Zn ] and log[Zn ]. ([Zn J and [Zn J are the concentrations of free Zn ions and inorganic Zn species.) (b) Cellular Zn/C mole ratio as functions of [Zn ] and [Zn J (symbols as in part a), (c) Lines are the same as in part (b). Points represent computed relationships in the nutricline of three stations in the North Pacific these relationships were computed from dissolved Zn versus PO4 concentrations in the respective water columns.

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