Si Uptake by the Centric Diatom, Chaetoceros Galvestonensis
Abstract
Chaetoceros galvestonensis was first classified in 1962 by Collier and Murphy at the A&M Marine Lab in Galveston. It, like other planktonic, centric diatoms, has extensions or setae projecting from the silicified cell wall. The four setae of C. galvestonensis were described by Collier and Murphy as being 2 μ in length. However, the length of the setae were seen to vary between isolates of organisms believed to be C. galvestonensis. These isolates were from Galveston and Alligator Harbor, Florida, and the reason for the variation in setae length was unknown, but were believed to be caused by differences in Si concentration in the water of the two locations. This study found that cells cultured in Si concentrations of 0.067, 0.120, 0.350, 0.558 and 0.866 mg Si/l showed no distinct variations in setae length. On the other hand, the initial concentration of Si in the media did have an effect on the final cell number and the amount of Si per cell of organisms cultured at that concentration. As the initial amount of Si in the media increased, the final cell number, as well as the amount of Si/cell, also increased.
Description
Program year: 1977-1978Digitized from print original stored in HDR
Subject
Chaetoceros galvestonensisCitation
Turner, Thomas Ralph, Jr. (1978). Si Uptake by the Centric Diatom, Chaetoceros Galvestonensis. University Undergraduate Fellows. Available electronically from https : / /hdl .handle .net /1969 .1 /CAPSTONE -TurnerT _1978.