Effect of a chelating agent (EDTA) on zinc uptake and regulation by Palaemon elegans (Crustacea: Decapoda)

作者: D. Nugegoda , P. S. Rainbow

DOI: 10.1017/S0025315400050074

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摘要: The littoral prawn Palaetnon elegans Rathke regulates the body concentration of zinc at higher external concentrations in presence EDTA. dissolved artificial sea water corresponding to threshold regulation breakdown changed from ca. 100 μg Zn 1-1 (ca. 1.53 μmol 1-1) without EDTA, 316 4.8 μmo1 8.6μmol EDTA 10 °C. regulated remained unchanged 77–79 g-1 dry wt with or Increased levels medium decreased rate uptake labelled by P. elegans. 3 mean prawns fig 2.9 0.25% total day"1 increased ability regulate may be explained reduced bioavailability zinc-EDTA complex for uptake. There is marked individual variation prawns, even same zinc-EDTA.

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