Document Detail

The effect of external Ca2+ and Ca(2+)-channel modulators on red-light-induced swelling of protoplasts of Phaseolus radiatus L.
MedLine Citation:
PMID:  9570016     Owner:  NLM     Status:  MEDLINE    
Red-light-induced swelling of the protoplasts isolated from hypocotyl of etiolated mung bean (Phaseolus radiatus L.) was observed only when Ca2+ ions were present in the medium. The optimal CaCl2 concentration was 250 microM. Swelling response declined when Ca2+ was supplied into the medium after red light irradiation. The Ca(2+)-chelator EGTA eliminated the red-light-induced swelling and 45Ca2+ accumulation in the protoplasts. In contrast, A23187, a Ca(2+)-ionophore, could mimic the effect of red light in darkness. These results indicate that Ca2+ may play a role in light signal transduction. In addition, swelling response was prevented by TFP and CPZ (both are CaM antagonists), implying the involvement of CaM in red-light-induced and Ca(2+)-dependent protoplast swelling.
C Long; X J Wang; R C Pan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Cell research     Volume:  8     ISSN:  1001-0602     ISO Abbreviation:  Cell Res.     Publication Date:  1998 Mar 
Date Detail:
Created Date:  1998-06-10     Completed Date:  1998-06-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9425763     Medline TA:  Cell Res     Country:  CHINA    
Other Details:
Languages:  eng     Pagination:  41-50     Citation Subset:  IM    
Department of Biology, South China Normal University, Guangzhou, China.
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MeSH Terms
Calcimycin / pharmacology
Calcium / physiology*
Calcium Channel Blockers / pharmacology
Calcium Channels / physiology*
Calcium Chloride / pharmacology
Calmodulin / antagonists & inhibitors,  physiology
Cations, Divalent
Cell Size / radiation effects
Chelating Agents / pharmacology
Chlorpromazine / pharmacology
Egtazic Acid / pharmacology
Fabaceae / radiation effects*
Ion Transport / radiation effects
Ionophores / pharmacology
Plants, Medicinal*
Protoplasts / radiation effects*
Signal Transduction
Trifluoperazine / pharmacology
Reg. No./Substance:
0/Calcium Channel Blockers; 0/Calcium Channels; 0/Calmodulin; 0/Cations, Divalent; 0/Chelating Agents; 0/Ionophores; 10043-52-4/Calcium Chloride; 117-89-5/Trifluoperazine; 50-53-3/Chlorpromazine; 52665-69-7/Calcimycin; 67-42-5/Egtazic Acid; 7440-70-2/Calcium

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

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