Ait Ali, Nadia Juneau, Philippe Didur, Olivier Perreault, François Popovic, Radovan
Published in
Photosynthesis Research
The photosystem II activity and energy dissipation was investigated when algal Chlamydomonas reinhardtii genotypes were exposed to dichromate toxicity effect. The exposure during 24 h to dichromate effect of two C. reinhardtii mutants having non-functional xanthophylls cycle, as npq1 zeaxanthin deficient and npq2 zeaxanthin accumulating, induced in...
Liu, WeiZhong Hu, Yong Zhang, RunJie Zhou, WeiWei Zhu, JiaYing Liu, XiangLin He, YiKun
Published in
Chinese Science Bulletin
MinD is a ubiquitous ATPase that plays a crucial role in selection of the division site in eubacteria, chloroplasts, and probably Archaea. In four green algae, Mesostigma viride, Nephroselmis olivacea, Chlorella vulgaris and Prototheca wickerhamii, MinD homologues are encoded in the plastid genome. However, in Arabidopsis, MinD is a nucleus-encoded...
Melis, Anastasios
Published in
Planta
Unicellular green algae have the ability to operate in two distinctly different environments (aerobic and anaerobic), and to photosynthetically generate molecular hydrogen (H2). A recently developed metabolic protocol in the green alga Chlamydomonas reinhardtii permitted separation of photosynthetic O2-evolution and carbon accumulation from anaerob...
Antal, Taras K. Krendeleva, Tatyana E. Rubin, Andrew B.
Published in
Photosynthesis Research
A set of chlorophyll fluorescence methods, including PEA (Plant Efficiency Analyser), PAM (Pulse Amplitude Modulated fluorometer), and picosecond fluorometer, was employed to study PS 2 heterogeneity in sulfur deprived green algae Chlamydomonas reinhardtii. The regression method and JIP test were applied to analyze chlorophyll fluorescence kinetics...
Makarova, Valeria V. Kosourov, Sergey Krendeleva, Tatiana E. Semin, Boris K. Kukarskikh, Galina P. Rubin, Andrei B. Sayre, Richard T. Ghirardi, Maria L. Seibert, Michael
Published in
Photosynthesis Research
Photoproduction of H2 was examined in a series of sulfur-deprived Chlamydomonas reinhardtii D1-R323 mutants with progressively impaired PSII photochemical activity. In the R323H, R323D, and R323E D1 mutants, replacement of arginine affects photosystem II (PSII) function, as demonstrated by progressive decreases in O2-evolving activity and loss of P...
Drapier, Dominique Rimbault, Blandine Vallon, Olivier Wollman, Francis-André Choquet, Yves
Published in
The EMBO journal
The (C)F1 sector from H(+)-ATP synthases comprises five subunits: alpha, beta, gamma, delta and epsilon, assembled in a 3:3:1:1:1 stoichiometry. Here, we describe the molecular mechanism ensuring this unique stoichiometry, required for the functional assembly of the chloroplast enzyme. It relies on a translational feedback loop operating in two ste...
Waters, Elizabeth R. Rioflorido, Ignatius
Published in
Journal of Molecular Evolution
Small heat shock proteins (sHSPs) are chaperones that are crucial in the heat shock response but also have important nonstress roles within the cell. sHSPs are found in all three domains of life (Bacteria, Archaea, and Eukarya). These proteins are particularly diverse within land plants and the evolutionary origin of the land plant sHSP families is...
Feldman, Jessica L Geimer, Stefan Marshall, Wallace F
Centriole positioning is a key step in establishment and propagation of cell geometry, but the mechanism of this positioning is unknown. The ability of pre-existing centrioles to induce formation of new centrioles at a defined angle relative to themselves suggests they may have the capacity to transmit spatial information to their daughters. Using ...
Raynaud, Cécile Loiselay, Christelle Wostrikoff, Katia Kuras, Richard Girard-Bascou, Jacqueline Wollman, Francis-André Choquet, Yves
Published in
Proceedings of the National Academy of Sciences of the United States of America
A salient feature of organelle gene expression is the requirement for nucleus-encoded factors that act posttranscriptionally in a gene-specific manner. A central issue is to understand whether these factors are merely constitutive or have a regulatory function. In the unicellular alga Chlamydomonas reinhardtii, expression of the chloroplast petA ge...
Zharmukhamedov, S. K. Shirshikova, G. N. Maevskaya, Z. V. Antropova, T. M. Klimov, V. V.
Published in
Russian Journal of Plant Physiology
Currently available data about bicarbonate (BC) action on the Mn-containing water-oxidizing complex (WOC) of the photosystem II (PSII) were obtained almost solely in vitro, e.g. on subchloroplast membrane fragments enriched with PSII. To investigate the in vivo BC effect on the PSII donor side, we used the method of dark thermoinactivation of intac...
