Nitrogen deprivation strongly affects Photosystem II but not phycoerythrin level in the divinyl-chlorophyll b-containing cyanobacterium Prochlorococcus marinus - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS Année : 2001

Nitrogen deprivation strongly affects Photosystem II but not phycoerythrin level in the divinyl-chlorophyll b-containing cyanobacterium Prochlorococcus marinus

C Steglich
  • Fonction : Auteur
M Behrenfeld
  • Fonction : Auteur
M Koblizek
  • Fonction : Auteur
S Penno
  • Fonction : Auteur
O Prasil
  • Fonction : Auteur
Wr Hess
  • Fonction : Auteur

Résumé

Effects of nitrogen limitation on Photosystem II (PSII) activities and on phycoerythrin were studied in batch cultures of the marine oxyphotobacterium Prochlorococcus marinus. Dramatic decreases in photochemical quantum yields (F-V/F-M), the amplitude of thermoluminescence (TL) B-band, and the rate of QA reoxidation were observed within 12 h of growth in nitrogen-limited conditions. The decline in F-V/F-M paralleled changes in the TL B-band amplitude, indicative of losses in PSII activities and formation of non-functional PSII centers. These changes were accompanied by a continuous reduction in D1 protein content. In contrast, nitrogen deprivation did not cause any significant reduction in phycoerythrin content. Our results refute phycoerythrin as a nitrogen storage complex in Prochlorococcus. Regulation of phycoerythrin gene expression in Prochlorococcus is different from that in typical phycobilisome-containing cyanobacteria and eukaryotic algae investigated so far. (C) 2001 Elsevier Science B.V. All rights reserved.

Domaines

Océanographie

Dates et versions

hal-03483067 , version 1 (16-12-2021)

Identifiants

Citer

C Steglich, M Behrenfeld, M Koblizek, Hervé Claustre, S Penno, et al.. Nitrogen deprivation strongly affects Photosystem II but not phycoerythrin level in the divinyl-chlorophyll b-containing cyanobacterium Prochlorococcus marinus. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS, 2001, 1503 (3), pp.341-349. ⟨10.1016/S0005-2728(00)00211-5⟩. ⟨hal-03483067⟩
3 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More