The uptake of phosphate by Carex species from oligotrophic to eutrophic swamp habitats

Brian J. Atwell*, Mirjam T. Veerkamp, Bep (C. E. E.). Stuiver, Pieter J. C. Kuiper

*Corresponding author for this work

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Phosphate uptake by excised roots of Carex species from a range of oligotrophic to eutrophic swamps was investigated. The range of species from oligotrophic to eutrophic is: C.rostrata Stokes, C.limosa L., C.lasiocarpa Ehrh., C.diandra Schrank, C.hudsonii A.Benn. and C.acutiformis Ehrh. All species showed two phases for Pi uptake in the Pi concentration range of 0.01 – 50 μM. In phase 1, C.rostrata and C.lasiocarpa had relatively high Vmax:s and Km:s, whereas the species from richer areas had intermediate values. The lowest Vmax and Km values were found in C.limosa and C.hudsonii. In phase 2, apart from the high Vmax and Km values found for C.lasiocarpa, the kinetic constants showed little variation, indicating a similar Pi carrier mechanism for all the species. Results on phosphate uptake and leakage are discussed against the phosphate requirement of each species in its specific habitat, and against the literature data of agricultural crops, which generally show a much lower affinity for phosphate uptake.

Original languageEnglish
Pages (from-to)487-494
Number of pages8
JournalPhysiologia Plantarum
Volume49
Issue number4
DOIs
Publication statusPublished - Aug 1980
Externally publishedYes

Keywords

  • Carex
  • phosphate uptake

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