Effects of the substances secreted from <i>Closterium aciculare</i> (Charophyceae, Chlorophyta) on the growth of freshwater phytoplankton under iron-deficient conditions

• Naito Kanako

  Laboratory of Marine Environmental Microbiology, Division of Applied Biosciences Graduate School of Agriculture, Kyoto University

• Suzuki Mitsuko

  Institute for Chemical Research, Kyoto University

• Mito Saeko

  Institute for Chemical Research, Kyoto University

• Hasegawa Hiroshi

  Graduate School of Natural Science & Technology, Kanazawa University

• Matsui Masakazu

  Institute for Chemical Research, Kyoto University

• Imai Ichiro

  Laboratory of Marine Environmental Microbiology, Division of Applied Biosciences Graduate School of Agriculture, Kyoto University

Bibliographic Information

Other Title

• Effects of the substances secreted from Closterium aciculare (Charophyceae, Chlorophyta) on the growth of freshwater phytoplankton under iron-deficient conditions

Abstract

Iron is an especially essential element for the growth of phytoplankton and its deficiency is well known to suppress primary productivity in both freshwater and marine ecosystems. We discovered iron-complexing ligands secreted by a freshwater eukaryotic phytoplankton, Closterium aciculare in an iron-deficient chemically defined medium. To investigate the character of the siderophore-like substance secreted from C. aciculare, growth experiments were carried out for several phytoplankton species using the culture filtrate (<0.4 μm) of C. aciculare after incubation under iron-deficient conditions. Addition of the culture filtrate of C. aciculare enhanced growth in the green algae C. aciculare, Pediastrum simplex, Staurastrum paradoxum and the diatom Aulacoseria granulata. However, addition of the filtrate suppressed that of the green alga Cosmocladium constrictum, and did not affect growth in the cyanobacteria Anabaena spiroides or Microcystis wesenbergii. These results suggest that the substances secreted from C. aciculare have species-specific growth-promoting effects and may control phytoplankton growth under iron-deficient conditions.

Journal

• Plankton and Benthos Research

  Plankton and Benthos Research 1 (4), 191-199, 2006

  The Plankton Society of Japan, The Japanese Association of Benthology

Keywords

• <i>Closterium aciculare</i>
• freshwater phytoplankton
• growth
• iron-complexing ligand
• iron-deficient conditions

Details

• CRID: 1390001205265325056
• NII Article ID: 10018808581
• NII Book ID: AA12130745
• DOI: 10.3800/pbr.1.191
• ISSN: 1882627X
• ISSN: 18808247
• NDL BIB ID: 8567799
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8567799
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed