Comparative study on the photosynthetic properties of prasiola (chlorophyceae) and nostoc (cyanophyceae) from antarctic and non-antarctic sites

Makiko Kosugi, Yuya Katashima, Shimpei Aikawa, Yukiko Tanabe, Sakae Kudoh, Yasuhiro Kashino, Hiroyuki Koike, Kazuhiko Satoh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The terrestrial cyanobacterium Nostoc commune Vaucher ex Bornet et Flahault occurs worldwide, including in Japan and on the Antarctic continent. The terrestrial green alga Prasiola crispa (Lightf.) Kütz. is also distributed in Antarctica. These two species need to acclimate to the severe Antarctic climate including low ambient temperature and desiccation under strong light conditions. To clarify this acclimation process, the physiological characteristics of the photosynthetic systems of these two Antarctic terrestrial organisms were assessed. The relative rate of photosynthetic electron flow in N. commune collected in Japan and in Antarctica reached maxima at 900 and 1,100 μmol photons · m-2 · s-1, respectively. The difference seemed to reflect the presence of high amounts of UV-absorbing substances within the Antarctic cyanobacterium. On the other hand, the optimal temperatures for photosynthesis at the two locations were 30°C-35°C and 20°C-25°C, respectively. This finding suggested a decreased photosynthetic thermotolerance in the Antarctic strain. P. crispa exhibited desiccation tolerance and dehydration-induced quenching of PSII fluorescence. Re-reduction of the photooxidized PSI reaction center, P700, was also inhibited at fully dry states. Photosynthetic electron flow in P. crispa reached a maximum at 20°C-25°C and at a light intensity of 700 μmol photons b m-2 b s-1. Interestingly, the osmolarity of P. crispa cells suggested that photosynthesis is performed using water absorbed in a liquid form rather than water absorbed from the air. Overall, these data suggest that these two species have acclimated to optimally photosynthesize under conditions of the highest light intensity and the highest temperature for their habitat in Antarctica.

Original languageEnglish
Pages (from-to)466-476
Number of pages11
JournalJournal of Phycology
Volume46
Issue number3
DOIs
Publication statusPublished - 2010 Jun

Fingerprint

Prasiola
Nostoc
Chlorophyceae
comparative study
desiccation
light intensity
Nostoc commune
cyanobacterium
Antarctica
photosynthesis
desiccation (plant physiology)
electron
Cyanobacteria
green alga
acclimation
dehydration
electrons
Japan
fluorescence
tolerance

Keywords

  • Antarctica
  • Nostoc commune
  • Optimum light intensity
  • Optimum temperature
  • Photosynthetic activity
  • Prasiola crispa

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

Cite this

Comparative study on the photosynthetic properties of prasiola (chlorophyceae) and nostoc (cyanophyceae) from antarctic and non-antarctic sites. / Kosugi, Makiko; Katashima, Yuya; Aikawa, Shimpei; Tanabe, Yukiko; Kudoh, Sakae; Kashino, Yasuhiro; Koike, Hiroyuki; Satoh, Kazuhiko.

In: Journal of Phycology, Vol. 46, No. 3, 06.2010, p. 466-476.

Research output: Contribution to journalArticle

Kosugi, Makiko ; Katashima, Yuya ; Aikawa, Shimpei ; Tanabe, Yukiko ; Kudoh, Sakae ; Kashino, Yasuhiro ; Koike, Hiroyuki ; Satoh, Kazuhiko. / Comparative study on the photosynthetic properties of prasiola (chlorophyceae) and nostoc (cyanophyceae) from antarctic and non-antarctic sites. In: Journal of Phycology. 2010 ; Vol. 46, No. 3. pp. 466-476.
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AU - Tanabe, Yukiko

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AU - Satoh, Kazuhiko

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