Document Detail

Impact of heavy metals on water loss from lichen thalli.
MedLine Citation:
PMID:  9262949     Owner:  NLM     Status:  MEDLINE    
Water loss in lichen species Cladonia convoluta (Lam.) and C. rangiformis (L.) Hoffm. after exposure to heavy-metal (Pb, Cu, or Zn) solutions, either as single compounds or in combination, have been studied in this laboratory. Water loss was reduced in Pb-treated C. convoluta, whereas in C. rangiformis it increased significantly with 10(-2) M Pb treatment. Water loss increased significantly (P = 0.05) after Cu treatment in C. convoluta but was significantly reduced (P = 0.05) in 10(-8) and 10(-6) M CuCl2-treated C. rangiformis. Similarly, water loss increased in all Zn-treated thalli but was significantly decreased (P = 0.05) in 10(-8) M treated C. rangiformis. A cumulative effect of Pb, Cu, and Zn was observed on water loss after uptake from mixed-metal solution. K+ efflux indicated the extent to which the plasma membrane presents an effective barrier to metal ion uptake.
M K Chettri; T Sawidis
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  37     ISSN:  0147-6513     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  1997 Jul 
Date Detail:
Created Date:  1997-09-23     Completed Date:  1997-09-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  103-11     Citation Subset:  IM    
Department of Botany, University of Thessaloniki, Macedonia, Greece.
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MeSH Terms
Biological Transport
Copper / pharmacology
Lead / pharmacology
Lichens / drug effects,  metabolism*
Linear Models
Metals, Heavy / pharmacology*
Potassium / metabolism
Water / metabolism*
Zinc / pharmacology
Reg. No./Substance:
0/Metals, Heavy; 7439-92-1/Lead; 7440-09-7/Potassium; 7440-50-8/Copper; 7440-66-6/Zinc; 7732-18-5/Water

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

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