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Die Bedeutung in Meerwasser gelöster Glucose für die Ernährung von Anemonia sulcata (Coelenterata: Anthozoa)

Die Bedeutung in Meerwasser gelöster Glucose für die Ernährung von Anemonia sulcata... 227 29 29 4 4 D. Schlichter Lehrstuhl für Physiologische Ökologie Zoologisches Institut der Universität zu Köln Köln Germany (FRG) Abstract Anemonia sulcata Pennant absorbs and accumulates tritiated D-glucose dissolved in sea water in natural concentrations (80 μg/l). The rate of decrease of glucose concentration in the sea water can best be described by an exponential function, when the concentration of added glucose exceeds 20 to 25 μg/l. The glucose, absorbed through the ectoderm, is immediately metabolized. This is determinable experimentally by tritiated water which is emitted into the sea water. The rate of uptake estimated experimentally was in the range 3 to 4 μg glucose/g wet weight/h, whilst the rate calculated by V max (maximum absorption rate) was 20 μg/g wet weight/h. The concentration of free glucose in the tentacle tissue is greater by a factor of 10 5 than that of the medium in which absorption takes place. Absorption is temperature-dependent; the Q 10 between 15° and 25°C exceeds 2; translocation is, therefore, energy-dependent. Absorption was diminished by inhibitors, especially by phlorizin. The actinians increase their energy reserves by absorption of glucose (and other dissolved organic substances). The energetic net profit by taking up glucose comprises up to 50% of the energy amount which is equivalent to the oxygen consumption. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Die Bedeutung in Meerwasser gelöster Glucose für die Ernährung von Anemonia sulcata (Coelenterata: Anthozoa)

Marine Biology , Volume 29 (4) – Apr 1, 1975

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References (13)

Publisher
Springer Journals
Copyright
Copyright © 1975 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00388848
Publisher site
See Article on Publisher Site

Abstract

227 29 29 4 4 D. Schlichter Lehrstuhl für Physiologische Ökologie Zoologisches Institut der Universität zu Köln Köln Germany (FRG) Abstract Anemonia sulcata Pennant absorbs and accumulates tritiated D-glucose dissolved in sea water in natural concentrations (80 μg/l). The rate of decrease of glucose concentration in the sea water can best be described by an exponential function, when the concentration of added glucose exceeds 20 to 25 μg/l. The glucose, absorbed through the ectoderm, is immediately metabolized. This is determinable experimentally by tritiated water which is emitted into the sea water. The rate of uptake estimated experimentally was in the range 3 to 4 μg glucose/g wet weight/h, whilst the rate calculated by V max (maximum absorption rate) was 20 μg/g wet weight/h. The concentration of free glucose in the tentacle tissue is greater by a factor of 10 5 than that of the medium in which absorption takes place. Absorption is temperature-dependent; the Q 10 between 15° and 25°C exceeds 2; translocation is, therefore, energy-dependent. Absorption was diminished by inhibitors, especially by phlorizin. The actinians increase their energy reserves by absorption of glucose (and other dissolved organic substances). The energetic net profit by taking up glucose comprises up to 50% of the energy amount which is equivalent to the oxygen consumption.

Journal

Marine BiologySpringer Journals

Published: Apr 1, 1975

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