Document Detail


Characterization of Photosynthetic Rhythms in Marine Dinoflagellates: II. Photosynthesis-Irradiance Curves and in Vivo Chlorophyll a Fluorescence.
MedLine Citation:
PMID:  16660099     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Using data from light-dark cultures of Gonyaulax polyedra entrained to a 24-hour cycle, whole cell absorption curves and photosynthesis-irradiance curves were constructed for various circadian times. While whole cell absorbance and half-saturation constants of photosynthesis showed no statistical difference that could be directly related to the photosynthetic rhythm, the initial slope of the photosynthesis-irradiance curve was a time-dependent parameter which altered in direct proportion to the change in photosynthetic capacity. The results indicated a temporal change in the relative quantum yield of photosynthesis, and the circadian rhythmicity of light-limited photosynthesis was established under constant conditions. Circadian rhythmicity was detected in room temperature chlorophyll fluorescence yield. Low temperature fluorescence kinetics also showed fluctuations. The results suggest that regulation of photosynthesis by the biological clock of Gonyaulax may be mediated through the membrane-bound light reactions and a partial explanation of the underlying mechanism is proposed.
Authors:
B B Prézelin; B M Sweeney
Related Documents :
24076239 - Defining the site of light perception and initiation of phototropism in arabidopsis.
23020549 - A high proportion of blue light increases the photosynthesis capacity and leaf formatio...
17024379 - Salinity and light interactively affect neotropical mangrove seedlings at the leaf and ...
21039609 - An analytical model of non-photorespiratory co₂ release in the light and dark in leaves...
16330779 - Forest response to elevated co2 is conserved across a broad range of productivity.
12226269 - Possible role of cbr, an algal early-light-induced protein, in nonphotochemical quenchi...
14871699 - Response of two afromontane coniferous tree species to light and nutrient supply.
6617799 - Premovement silent period in fast movement initiation.
24799649 - Randomized crossover study evaluating the effect of a hand sanitizer dispenser on the f...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant physiology     Volume:  60     ISSN:  0032-0889     ISO Abbreviation:  Plant Physiol.     Publication Date:  1977 Sep 
Date Detail:
Created Date:  2010-06-29     Completed Date:  2010-06-29     Revised Date:  2010-09-15    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  388-92     Citation Subset:  -    
Affiliation:
Department of Biological Sciences, University of California, Santa Barbara, California 93106.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Characterization of Photosynthetic Rhythms in Marine Dinoflagellates: I. Pigmentation, Photosyntheti...
Next Document:  Freezing Injury in Onion Bulb Cells: I. Evaluation of the Conductivity Method and Analysis of Ion an...