Document Detail

Presence of Chloride Reduces Malate Production in Epidermis during Stomatal Opening.
MedLine Citation:
PMID:  16660293     Owner:  NLM     Status:  PubMed-not-MEDLINE    
When stomata of isolated epidermis of Vicia faba are allowed to open in the presence of K(+) and iminodiacetate (an impermeant zwitterion), malate is formed in the epidermis; the increases in malate content follow a nearly linear relationship with stomatal aperture. Stomata of leaf sections of V. faba floated on water during opening also exhibit this relationship. When isolated epidermis is offered KCI, this relationship is not observed and less malate is detected at comparable stomatal apertures. The data indicate that Cl(-), if present at concentrations >/= 10(-5) eq liter(-1), can partially satisfy the anion requirement of guard cells of V. faba during stomatal opening. Discrepancies between earlier reports on the relative roles Cl(-) and malate play as counterions for K(+) in guard cells of V. faba could now be explained as resulting from variations in the availability of Cl(-) to guard cells.
C A Van Kirk; K Raschke
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant physiology     Volume:  61     ISSN:  0032-0889     ISO Abbreviation:  Plant Physiol.     Publication Date:  1978 Mar 
Date Detail:
Created Date:  2010-06-29     Completed Date:  2010-06-29     Revised Date:  2010-09-14    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  361-4     Citation Subset:  -    
Michigan State University/Energy Research and Development Administration Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824.
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