Document Detail

Timing of phosphate application affects arsenic phytoextraction by Pteris vittata L. of different ages.
MedLine Citation:
PMID:  18045757     Owner:  NLM     Status:  MEDLINE    
The effects of timing in phosphate application on plant growth and arsenic removal by arsenic hyperaccumulator Pteris vittata L. of different ages were evaluated. The hydroponic experiment consisted of three plant ages (A45d, A90d and A180d) and three P feeding regimens (P200+0, P134+66 and P66+134) growing for 45 d in 0.2-strength Hoagland-Arnon solution containing 145 microg L(-1) As. While all plants received 200 microM P, P was added in two phases: during acclimation and after arsenic exposure. High initial P-supply (P200+0) favored frond biomass production and plant P uptake, while split-P application (P134+66 and P66+134) favored plant root production. Single P addition favored arsenic accumulation in the roots while split-P addition increased frond arsenic accumulation. Young ferns (A45d) in treatment P134+66 were the most efficient in arsenic removal, reducing arsenic concentration to below 10 microg L(-1) in 35 d. The results indicated that the use of young ferns, coupled with feeding of low initial P or split-P application, increased the efficiency of arsenic removal by P. vittata.
Jorge A G Santos; Maria I S Gonzaga; Lena Q Ma; M Srivastava
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Publication Detail:
Type:  Journal Article     Date:  2007-11-28
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  154     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-06-09     Completed Date:  2008-09-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  306-11     Citation Subset:  IM    
Department of Soil Chemistry, Universidade Federal da Bahia, Cruz das Almas, 44380000, Brazil.
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MeSH Terms
Arsenic / metabolism*
Biodegradation, Environmental
Biological Transport
Carcinogens, Environmental / metabolism*
Phosphates / pharmacology*
Phosphorus / analysis
Pteris / growth & development,  metabolism*
Soil Pollutants / metabolism*
Water Pollutants, Chemical / metabolism
Reg. No./Substance:
0/Carcinogens, Environmental; 0/Phosphates; 0/Soil Pollutants; 0/Water Pollutants, Chemical; 7440-38-2/Arsenic; 7723-14-0/Phosphorus

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