Document Detail


Circadian rhythms in electrical circuits of Clivia miniata.
MedLine Citation:
PMID:  21546115     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The biological clock regulates a wide range of physiological processes in plants. Here we show circadian variation of the Clivia miniata responses to electrical stimulation. The biologically closed electrochemical circuits in the leaves of C. miniata (Kaffir lily), which regulate its physiology, were analyzed in vivo using the charge stimulation method. The electrostimulation was provided with different voltages and electrical charges. Resistance between Ag/AgCl electrodes in the leaf of C. miniata was higher at night than during the day or the following day in the darkness. The biologically closed electrical circuits with voltage gated ion channels in C. miniata are activated the next day, even in the darkness. C. miniata memorizes daytime and nighttime. At continuous light, C. miniata recognizes nighttime and increases the input resistance to the nighttime value even under light. These results show that the circadian clock can be maintained endogenously and has electrochemical oscillators, which can activate voltage gated ion channels in biologically closed electrochemical circuits. The activation of voltage gated channels depends on the applied voltage, electrical charge and speed of transmission of electrical energy from the electrostimulator to the C. miniata leaves. We present the equivalent electrical circuits in C. miniata and its circadian variation to explain the experimental data.
Authors:
Alexander G Volkov; Joseph D Wooten; Astian J Waite; Corydon R Brown; Vladislav S Markin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-3
Journal Detail:
Title:  Journal of plant physiology     Volume:  -     ISSN:  1618-1328     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882059     Medline TA:  J Plant Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier GmbH.
Affiliation:
Department of Chemistry and Biochemistry, Oakwood University, Huntsville, AL 35896, USA.
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