Studies on enhanced post-illumination respiration in microalgae |
| |
| Authors: | Beardall John; Burger-Wiersma Tineke; Rijkeboer Machteld; Sukenik Assaf; Lemoalle Jacques; Dubinsky Zvy; Fontvielle Daniel |
| |
| Institution: | 1Department of Ecology and Evolutionary Biology, Monash University Clayton, Victoria, 3168, Australia
2Laboratory for Microbiology, University of Amsterdam Nieuwe Achtergracht 127 1018 WS, Amsterdam
3Netherlands Institute of Ecology, Centre for Limnology Rijksstraatweg 6, 3631 AC Nieuwersluis, The Netherlands
4Israel Oceanographic & Limnological Research Institute PO Box 8030, Haifa 31080, Israel
5Laboratoire d'Hydrobiologie ORSTOM BP 5045, Montpellier Cedex, France
6Department of Life Sciences, Bar-Ilan University 52100 Ramat-Gan, Israel
7Laboratoire d'Ecologie, Universite de Savoie BP 1104, 73011 Chambery, France |
| |
| Abstract: | The extent of enhanced post-illumination respiration (EPIR)has been investigated in a number of microalgae. Respirationrates, as determined by O2 consumption, were enhanced (in allbut one case) by 50–140% following pre-exposure to highphoton flux compared to rates obtained for steady-state darkrespiration. The extent of EPIR was dependent more on photonflux than on duration of exposure, although the latter did havesome effect. In Isochrysis galbana and Chaetoceros calcitrens,EPIR effects were also demonstrated using 14C]CO2 evolution.In I.galbana, release of CO2 from cells pre-exposed to a periodof high photon flux was most rapid from carbohydrate and low-molecular-weightmetabolites. Data obtained from Thalassiosira weisflogii indicatethat cells grown at low photon flux are more susceptible toEPIR than those grown under high photon flux. These resultsare discussed in the context of various hypotheses that havebeen proposed regarding the mechanism of EPIR effects.
8Present address: RIVM-LWD, PO Box 1, 3720 BA Bilthoven, TheNetherlands |
| |
| Keywords: | |
| 本文献已被 Oxford 等数据库收录！ |
|
