Effect of ultraviolet-A (UV-A) light on growth, photosynthetic activity and production of biopterin glucoside by the marine UV-A resistant cyanobacterium Oscillatoria sp.

Youji Wachi, J. Grant Burgess, Kaori Iwamoto, Noriko Yamada, Noriyuki Nakamura, Tadashi Matsunaga*

*この研究の対応する著者

研究成果: Article査読

38 被引用数 (Scopus)

抄録

We have isolated a marine planktonic cyanobacterium Oscillatoria sp. NKBG 091600 which is resistant to ultraviolet-A (UV-A) irradiation. In response to UV-A irradiation this cyanobacterium produces high levels of a UV-A absorbing compound which was identified previously as biopterin glucoside. Here, we have investigated the effect of UV-A light intensity on growth, biopterin glucoside production and photosynthetic activity. Oscillatoria sp. NKBG 091600 could grow at UV-A intensities of up to 800 μW/cm2 and at 300 μW/cm2 could grow as well as in the absence of UV-A irradiation. In addition, pre-culture of cells with UV-A protected cells from UV-A induced inhibition of photosynthetic activity. Detection of biopterin glucoside levels in irradiated cells by HPLC demonstrated that after 10 h there was a rapid increase in biopterin glucoside content. This increase was dependent on the intensity of the UV-A irradiation.

本文言語English
ページ(範囲)165-168
ページ数4
ジャーナルBBA - General Subjects
1244
1
DOI
出版ステータスPublished - 1995 5 11
外部発表はい

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学

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