Requirements for silicon in Synura petersenii algae

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Requirements for silicon in Synura petersenii

Klaveness, Dag; Guillard, Robert R. L.
Journal of Phycology (1975), 11(3), 349-55 CODEN: JPYLAJ; ISSN: 0022-3646. English.

Abstract

A Si requirement for growth is demonstrated for an alga other than a diatom. Concns. of <1mM SiO32- greatly decreased the growth rate of S. petersenii and caused morphol. changes. Half maximum growth rate appeared at a concentration of only 0.23mM SiO32-. GeO2 inhibited growth considerably; the degree of inhibition varying from none to almost 100% depending upon both Si and Ge concns. The amount of Si deposited in the external scales of S. petersenii is comparable per unit area to that of diatoms. S. petersenii is able to deplete the medium of SiO32- to very low levels. The feasibility of batch culture techniques for this kind of work is discussed briefly.

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