Phosphorus and the Growth of Euglena gracilis

D. E. BUETOW, K. E. SCHUIT

Research output: Contribution to journalArticle

Abstract

SYNOPSIS. Growth of streptomycin‐bleached Euglena gracilis depends in part on the availability of phosphorus. Maximum cell density on a defined medium is reached at a phosphorus (supplied as inorganic phosphate) concentration of 4–5 μ/ml. At lower concentrations, the cells apparently deplete the medium of phosphorus. Inorganic phosphorus at > 1 mg/ml inhibits growth in terms of cell density per ml and generation time. Phosphorus‐limited cells survive for at least 6–7 days and are able to undergo mitosis following a lag period when returned to phosphorus‐containing medium. The majority of inorganic 32P incorporated by these Euglena ends up in the hot trichloroacetic acid soluble fraction and in the ethanol‐ether soluble fraction.

Original languageEnglish (US)
Pages (from-to)770-773
Number of pages4
JournalThe Journal of Protozoology
Volume15
Issue number4
DOIs
StatePublished - Nov 1968

ASJC Scopus subject areas

  • Parasitology

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