NDLI: Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae).

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Polyphasic characterization of benthic cyanobacterial diversity from biofilms of the Guadarrama river (Spain): morphological, molecular, and ecological approaches(1).

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Effects of UVB Radiation on competition between the bloom-forming cyanobacterium Microcystis aeruginosa and the Chlorophyceae Chlamydomonas microsphaera(1).

Classification of crucigenoid algae: phylogenetic position of the reinstated genus Lemmermannia, Tetrastrum spp. Crucigenia tetrapedia, and C. lauterbornii (Trebouxiophyceae, Chlorophyta)(1).

Chronological transition of mitochondrial morphology in Chlamydomonas reinhardtii (Chlorophyceae) poststationary phase growth(1).

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Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae).

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Year: 2013 Volume: 49 Issue: 1

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Year: 2011 Volume: 47

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Year: 2008 Volume: 44

Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae).

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Humby, Penny L. Snyder, Ellen C. R. Durnford, Dion G.
Description	Author Affiliation: Humby PL ( Department of Biology, University of New Brunswick, 10 Bailey Drive, Fredericton, New Brunswick, Canada, E3B 5A3.); Snyder EC ( Department of Biology, University of New Brunswick, 10 Bailey Drive, Fredericton, New Brunswick, Canada, E3B 5A3.); Durnford DG ( Department of Biology, University of New Brunswick, 10 Bailey Drive, Fredericton, New Brunswick, Canada, E3B 5A3.)
Abstract	The mechanisms of microalgal senescence may play an important role in nutrient recycling and enhanced survival. However, the aging physiology of microalgae is an understudied phenomenon. To investigate the patterns of conditional senescence in Chlamydomonas reinhardtii P. A. Dangeard, we used a cell wall-less strain, transformed with a reporter gene to infer changes in photosynthetic gene expression. We examined plastid ultrastructure, photosynthetic function, and photoprotective mechanisms during aging in batch cultures. LHCII transcription levels decreased before the population entered stationary phase, and the characteristic transcriptional light-shift response was lost. A decline in photosynthetic proteins with a concomitant increase in the photoprotective protein, LHCSR, was observed over time. However, nonphotochemical quenching remained stable during growth and stationary phase, and then declined as alternative quenching mechanisms were up-regulated. Photosynthetic efficiency declined, while Fv/Fm remained stable until the death phases. As the culture progressed through stationary phase, disorganization of the chloroplast was observed along with an increase in cytoplasmic oil bodies. We also observed a partial recovery of function and proteins during the final death phase, and attribute this to the release of nutrients into the medium from cell lysis and/or active secretion while cells were senescing. Allowing open gas exchange resulted in high levels of sustained starch production and maintained maximum cell density, prolonging the stationary phase.
File Format	HTM / HTML
ISSN	00223646
Issue Number	2
Journal	Journal of Phycology
Volume Number	49
e-ISSN	15298817
Language	English
Publisher	Wiley
Publisher Date	2013-04-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Botany
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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LOCALIZATION OF OXYTETRACYCLINE IN CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE)(1).

Chronological transition of mitochondrial morphology in Chlamydomonas reinhardtii (Chlorophyceae) poststationary phase growth(1).

AN OPTIMIZED METHOD FOR THE ISOLATION OF NUCLEI FROM CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE)(1).

THE ROLE OF ZINC FINGER PROTEIN IN RNAi INTERFERENCE IN A UNICELLULAR GREEN ALGA CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE).

Recharacterization of Chlamydomonas reinhardtii and its relatives with new isolates from Japan

Menadione-induced caspase-dependent programmed cell death in the green chlorophyte Chlamydomonas reinhardtii

Cellular organelles facilitate dimerization of a newly identified Arf from Chlamydomonas reinhardtii.

Effects of UVB Radiation on competition between the bloom-forming cyanobacterium Microcystis aeruginosa and the Chlorophyceae Chlamydomonas microsphaera(1).

Bioflocculant produced by Chlamydomonas reinhardtii

Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae).

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LOCALIZATION OF OXYTETRACYCLINE IN CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE)(1).

Chronological transition of mitochondrial morphology in Chlamydomonas reinhardtii (Chlorophyceae) poststationary phase growth(1).

AN OPTIMIZED METHOD FOR THE ISOLATION OF NUCLEI FROM CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE)(1).

THE ROLE OF ZINC FINGER PROTEIN IN RNAi INTERFERENCE IN A UNICELLULAR GREEN ALGA CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE).

Recharacterization of Chlamydomonas reinhardtii and its relatives with new isolates from Japan

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Cellular organelles facilitate dimerization of a newly identified Arf from Chlamydomonas reinhardtii.

Effects of UVB Radiation on competition between the bloom-forming cyanobacterium Microcystis aeruginosa and the Chlorophyceae Chlamydomonas microsphaera(1).

Bioflocculant produced by Chlamydomonas reinhardtii

Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae).