Document Detail

Uranium accumulation of crop plants enhanced by citric acid.
MedLine Citation:
PMID:  16237609     Owner:  NLM     Status:  MEDLINE    
Citric acid was applied to soil to enhance U accumulation in four crop plants. While the highest enhanced U accumulation of aboveground tissues (a.c. 2000 mg kg(-1) dry weight) occurred in the leaves of Indian mustard (Brassica juncea), the highest enhanced U accumulation of roots (a.c. 3500 mg kg(-1) dry weight) occurred in canola (Brassica napus var. napus). Uranium translocation among tissues of test plants is in the relation of roots>shoots congruent with leaves. The flowers of sunflower (Helianthus annuus) contained similar or higher U concentrations than those found in shoots, but concentrations in seeds are close to zero. In conclusion, Indian mustard is recommended as a potential species for phytoextraction for U-contaminated soil due to its high U accumulation of aboveground biomass (a.c. 2200 microg per plant). There is no evidence that two types of soils cause a significant difference of the enhanced U accumulation (p<0.05). Results, however, indicate that additional citric acid may result in downward U migration that may contaminate groundwater. Speciation of U that is taken up by plants is also discussed in the end.
Peichun Chang; Kyoung-Woong Kim; Satoshi Yoshida; Soo-Young Kim
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental geochemistry and health     Volume:  27     ISSN:  0269-4042     ISO Abbreviation:  Environ Geochem Health     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-10-20     Completed Date:  2006-07-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8903118     Medline TA:  Environ Geochem Health     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  529-38     Citation Subset:  IM    
UNU and GIST Joint Programme on Science and Technology for Sustainability, International Environmental Research Center, Gwangju 500-712, South Korea.
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MeSH Terms
Citric Acid / chemistry*
Crops, Agricultural / metabolism*
Environmental Pollution / prevention & control*
Mass Spectrometry
Soil / analysis*
Uranium / analysis*,  pharmacokinetics*
Reg. No./Substance:
0/Soil; 7440-61-1/Uranium; 77-92-9/Citric Acid

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

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