Photoautotrophic growth of <i>Noctiluca scintillans</i> with the endosymbiont <i>Pedinomonas noctilucae</i>

• Saito Haruna

  Graduate school of Agricultural and Biosciences, the University of Tokyo

• Furuya Ken

  Graduate school of Agricultural and Biosciences, the University of Tokyo

• Lirdwitayaprasit Thaithaworn

  Graduate school of Agricultural and Biosciences, the University of Tokyo

Bibliographic Information

Other Title

• Photoautotrophic growth of Noctiluca scintillans with the endosymbiont Pedinomonas noctilucae
• Photoautotrophic growth of Noctiluca scintillans with an endosymbiont Pedinomonas noctilucae

Abstract

Photosynthesis and respiration of a heterotrophic dinoflagellate Noctiluca scintillans that contained Pedinomonas noctilucae as an endosymbiont, were examined on cultures and natural populations in Manila Bay, Philippines, using a Clark-type oxygen electrode. The cultures isolated from the inner Gulf of Thailand were of two types: one required external supply of Dunaliella tertiolecta as food (feeding strains) and the other did not (non-feeding strains). The non-feeding strains grew photoautotrophically for generations, but they also fed on D. tertiolecta, indicating phagotrophy was facultative. Gross photosynthesis was at the same level in both types, but net photosynthesis was significantly higher in the non-feeding strains than the feeding ones. The difference was due to high respiration activity in the feeding strains. This was consistent with observations in the natural population of Manila Bay, where net photosynthesis was significantly higher in cells lacking food vacuoles than those with food vacuoles. The relationship of photosynthesis with irradiance was characterized by low intensity of light saturation and absence or weak photoinhibition, showing efficient utilization of a wide range of light intensities. P. noctilucae likely assures a supply of organic matter to the host, and facilitates survival of N. scintillans during shortages of food particles.

Journal

• Plankton and Benthos Research

  Plankton and Benthos Research 1 (2), 97-101, 2006

  The Plankton Society of Japan, The Japanese Association of Benthology

Keywords

• <i>Noctiluca scintillans</i>
• <i>Pedinomonas noctilucae</i>
• symbiosis
• dark respiration
• photosynthesis

Details

• CRID: 1390001205265422720
• NII Article ID: 10018145894
• NII Book ID: AA12130745
• DOI: 10.3800/pbr.1.97
• ISSN: 1882627X
• ISSN: 18808247
• NDL BIB ID: 7943965
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7943965
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed