Literature DB >> 24442800

Silicic-acid uptake in diatoms studied with [(68)Ge]germanic acid as tracer.

F Azam1.   

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.

Entities:  

Year:  1974        PMID： 24442800     DOI： 10.1007/BF00389321

Source DB:  PubMed          Journal:  Planta        ISSN： 0032-0935            Impact factor:   4.116


  3 in total

1.  Silicon Metabolism in Diatoms. II. Sources of Silicon for Growth of Navicula Pelliculosa.

Authors:  J C Lewin
Journal:  Plant Physiol       Date:  1955-03       Impact factor: 8.340

2.  Role of silicon in diatom metabolism. V. Silicic acid transport and metabolism in the heterotrophic diatom Nitzschia alba.

Authors:  F Azam; B B Hemmingsen; B E Volcani
Journal:  Arch Microbiol       Date:  1974-04-19       Impact factor: 2.552

3.  Studies on the biochemistry and fine structure of silica shell formation in diatoms. II. Changes in concentration of nucleoside triphosphates in silicon-starvation synchyrony of Navicula pelliculosa (Bréb.) Hilse.

Authors:  J Coombs; P J Halicki; O Holm-Hansen; B E Volcani
Journal:  Exp Cell Res       Date:  1967-08       Impact factor: 3.905
  3 in total
  5 in total

1.  Analysis of Thalassiosira pseudonana silicon transporters indicates distinct regulatory levels and transport activity through the cell cycle.

Authors:  Kimberlee Thamatrakoln; Mark Hildebrand
Journal:  Eukaryot Cell       Date:  2006-12-15

2.  Germanium-68 as an adequate tracer for silicon transport in plants. Characterization of silicon uptake in different crop species.

Authors:  Miroslav Nikolic; Nina Nikolic; Yongchao Liang; Ernest A Kirkby; Volker Römheld
Journal:  Plant Physiol       Date:  2006-11-10       Impact factor: 8.340

3.  Silicon uptake in diatoms revisited: a model for saturable and nonsaturable uptake kinetics and the role of silicon transporters.

Authors:  Kimberlee Thamatrakoln; Mark Hildebrand
Journal:  Plant Physiol       Date:  2007-12-27       Impact factor: 8.340

4.  Germanium-68 as a possible marker for silicon transport in rat brain.

Authors:  G A Taylor; R G Pullen; A B Keith; J A Edwardson
Journal:  Neurochem Res       Date:  1992-12       Impact factor: 3.996

5.  Understanding the sub-cellular dynamics of silicon transportation and synthesis in diatoms using population-level data and computational optimization.

Authors:  Narjes Javaheri; Roland Dries; Jaap Kaandorp
Journal:  PLoS Comput Biol       Date:  2014-06-19       Impact factor: 4.475
  5 in total

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