Species-specific allelopathic effects of the diatom skeletonema costatum

Y. Yamasaki, Y. Ohmichi, T. Shikata, M. Hirose, Yohei Shimasaki, Yuji Oshima, T. Honjo

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We examined allelopathic effects of Skeletonema costatum on the growth of Heterosigma akashiwo, a major competitor of S. costatum. Growth of H. akashiwo was inhibited when it was exposed to S. costatum filtrates collected in the stationary and decline growth phases. During the decline phase, the filtrate had the strongest inhibitory effect. Deactivation of the allelopathic effect of S. costatum was not observed when the filtrate was preserved at room temperature for 30 days. Additionally, crude extracts greater than 3,500 Da, obtained by dialysis, did not inhibit the growth of H. akashiwo; that is, S. costatum produces low molecular weight allelochemicals. Furthermore, we examined the allelopathic effects of S. costatum on the growth of other species and determined that these effects were both species-specific and dependent upon the cell density of the target species. It is likely that the allelochemicals produced by S. costatum are chemically stable low molecular weight substances, and the allelopathy of S. costatum has the potential to affect the succession of phytoplankton species during dense blooms of S. costatum and/or after a decline in the bloom of S. costatum.

Original languageEnglish
Pages (from-to)21-32
Number of pages12
JournalThalassas
Volume27
Issue number1
Publication statusPublished - Feb 21 2011

Fingerprint

Skeletonema costatum
Bacillariophyceae
diatom
allelochemical
filtrates
algal bloom
allelopathy
allelochemicals
phytoplankton
effect
molecular weight
dialysis
ambient temperature
temperature

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science

Cite this

Yamasaki, Y., Ohmichi, Y., Shikata, T., Hirose, M., Shimasaki, Y., Oshima, Y., & Honjo, T. (2011). Species-specific allelopathic effects of the diatom skeletonema costatum. Thalassas, 27(1), 21-32.

Species-specific allelopathic effects of the diatom skeletonema costatum. / Yamasaki, Y.; Ohmichi, Y.; Shikata, T.; Hirose, M.; Shimasaki, Yohei; Oshima, Yuji; Honjo, T.

In: Thalassas, Vol. 27, No. 1, 21.02.2011, p. 21-32.

Research output: Contribution to journalArticle

Yamasaki, Y, Ohmichi, Y, Shikata, T, Hirose, M, Shimasaki, Y, Oshima, Y & Honjo, T 2011, 'Species-specific allelopathic effects of the diatom skeletonema costatum', Thalassas, vol. 27, no. 1, pp. 21-32.
Yamasaki Y, Ohmichi Y, Shikata T, Hirose M, Shimasaki Y, Oshima Y et al. Species-specific allelopathic effects of the diatom skeletonema costatum. Thalassas. 2011 Feb 21;27(1):21-32.
Yamasaki, Y. ; Ohmichi, Y. ; Shikata, T. ; Hirose, M. ; Shimasaki, Yohei ; Oshima, Yuji ; Honjo, T. / Species-specific allelopathic effects of the diatom skeletonema costatum. In: Thalassas. 2011 ; Vol. 27, No. 1. pp. 21-32.
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