Photoinhibition and Its Recovery in Two Strains of the Cyanobacterium Spirulina platensis |
| |
Authors: | Vonshak, Avigad Guy, Rachel Poplawsky, Ricardo Ohad, Itzhak |
| |
Affiliation: | 2Micro-Algal Biotechnology Lab, The Jacob Blaustein Institute for Desert Research, Ben-Gurion University Sede-Boqer Campus 84993, Israel 3Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University Jerusalem 91909, Israel |
| |
Abstract: | Two strains of Spirulina platensis, marked Sp-G and Sp-RB, werestudied for their response to high photon flux densities (PFD).Sp-RB, a gas vacuolated strain, appeared more sensitive to thehigh PFD treatment as compared with Sp-G, a non-vacuolated strain.The loss of the photosynthetic activity due to the photoinhibitorytreatment was obtained at the level of whole cells as well asthe membrane level. Sp-RB was more sensitive than Sp-G at bothlevels. Experiments using chloramphenicol during the photoinhibitionprocess, and others in which the fate of radio-active labeledthylakoid proteins was followed, indicated that the differencebetween the strains lies in the rate of loss of the Dl polypeptidewith an electrophoretic mobility of 3234 kDa. Both strainsrecovered from the photoinhibition when placed under low PFD.The recovery process started immediately after PFD was reduced,without any observed lag period, and was sensitive to chloramphenicol.Light was required for full recovery of activity. The rate ofrecovery of the two strains studied was very similar. 1Contribution no. 29 of the Micro-Algal Biotechnology Lab. (Received January 11, 1988; Accepted March 31, 1988) |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|