Abstract:
:Uptake of silicic acid in the diatoms Navicula pelliculosa and Nitzschia alba was studied, using the natural isotope, (28)Si, or a radioisotope, (31)Si. The rate of uptake of silicic acid was also determined by using [(68)Ge]germanic acid as a tracer of silicic acid. At a given silicicacid concentration in the growth medium, the fractions of [(68)Ge]germanic acid taken up followed closely the fraction of silicic acid taken up in the same time period. When the initial concentration of silicic acid was varied at a constant (trace) concentration of [(68)Ge]-germanic acid, the uptake of (68)Ge followed the fraction of silicic acid removed, and not the absolute amount removed from the medium, at all silicic-acid concentrations. The usefulness of this approach in studying silicic-acid uptake is discussed.
journal_name
Plantajournal_title
Plantaauthors
Azam Fdoi
10.1007/BF00389321subject
Has Abstractpub_date
1974-01-01 00:00:00pages
205-12issue
3eissn
0032-0935issn
1432-2048journal_volume
121pub_type
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