Article (Scientific journals)
Growth, fluorescence, photosynthetic O-2 production and pigment content of salt adapted cultures of Arthrospira (Spirulina) platensis
Ben Dhiab, R.; Ben Ouada, H.; Boussetta, H. et al.
2007In Journal of Applied Phycology, 19 (4), p. 293-301
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Keywords :
Arthrospira platensis; cyanobacteria; fluorescence; photosynthetic activity; photosynthetic pigments; salt stress
Abstract :
[en] The effect of salt concentration (NaCl) on growth, fluorescence, photosynthetic activities and pigment content of the cyanobacterium Arthrospira platensis has been investigated over 15 days. It has been observed that high NaCl concentration induces an increase of the growth, photosynthetic efficiency (alpha), phycobilin/chlorophyll ratio and a slight decrease of dark respiration and compensation points. Moreover, high NaCl concentration enhances photosystem II (PSII) activity compared to photosystem I (PSI). Results show that the phycobilin-PSII energy transfer compared to the chlorophyll-PSII (F-695,F-600/F-695,F-440) increases. However, data obtained about the maximal efficiency of PSII photochemistry are controversial. Indeed, the Fv/Fm ratio decreases in salt adapted cultures, while at the same time the trapping flux per PSII reaction center (TR0/RC) and the probability of electron transport beyond QA (Psi(0)) remain unchanged at the level of the donor and the acceptor sites of PSII. This effect can be attributed to the interference of phycobilin fluorescence with Chl a when performing polyphasic transient measurements.
Disciplines :
Microbiology
Aquatic sciences & oceanology
Biotechnology
Author, co-author :
Ben Dhiab, R.
Ben Ouada, H.
Boussetta, H.
Franck, Fabrice ;  Université de Liège - ULiège > Département des sciences de la vie > Biochimie végétale
Elabed, A.
Brouers, Michel ;  Université de Liège - ULiège > Département des sciences de la vie > Biochimie végétale
Language :
English
Title :
Growth, fluorescence, photosynthetic O-2 production and pigment content of salt adapted cultures of Arthrospira (Spirulina) platensis
Publication date :
August 2007
Journal title :
Journal of Applied Phycology
ISSN :
0921-8971
eISSN :
1573-5176
Publisher :
Springer, Dordrecht, Netherlands
Volume :
19
Issue :
4
Pages :
293-301
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 May 2010

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