Document Detail

Low molecular weight organic acids and fatty acids in root exudates of two Lupinus cultivars at flowering and fruiting stages.
MedLine Citation:
PMID:  11705257     Owner:  NLM     Status:  MEDLINE    
Low molecular weight organic acids (LOAs) and fatty acids in root exudates of two lupin cultivars, Lupinus albus cv. Multolupa and L. luteus cv. Tremosilla, were determined at flowering and fruiting stages. LOAs were analysed by capillary electrophoresis. Acetic and citric acids were the most abundant, especially the latter in L. luteus at the flowering stage (5922.79 micrograms/g dry root). The significant decrease in acid content of both cultivars from flowering to fruiting stages was also striking. The highest levels of acetic acid were detected in L. luteus at fruiting stage (1542.03 micrograms/g dry root). The significant citrate production in L. luteus could be related to the low phosphorus concentration in the studied soils but not to proteoid roots, which were detected only in L. albus. The source of the LOAs detected in these exudates is also discussed, since they may be produced either by the plant or by the associated rhizobacteria. The profile of phospholipid fatty acids was determined by high-resolution GC. A high level of 18:2 omega 6 (a fatty-acid specific to fungi) was found in exudates of L. luteus (a mycorrhizal plant) in contrast to L. albus (a non-mycorrhizal plant).
J A Lucas García; C Barbas; A Probanza; M L Barrientos; F J Gutierrez Mañero
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Phytochemical analysis : PCA     Volume:  12     ISSN:  0958-0344     ISO Abbreviation:  Phytochem Anal     Publication Date:    2001 Sep-Oct
Date Detail:
Created Date:  2001-11-13     Completed Date:  2001-12-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9200492     Medline TA:  Phytochem Anal     Country:  England    
Other Details:
Languages:  eng     Pagination:  305-11     Citation Subset:  IM    
Universidad San Pablo CEU, PO Box 67, Boadilla del Monte, 28660 Madrid, Spain.
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MeSH Terms
Acids / analysis*,  chemistry
Chromatography, Gas
Electrophoresis, Capillary
Fabaceae / chemistry
Fatty Acids / analysis*,  chemistry
Molecular Weight
Organic Chemicals / analysis*,  chemistry
Phospholipids / chemistry
Plant Roots / chemistry
Reproducibility of Results
Reg. No./Substance:
0/Acids; 0/Fatty Acids; 0/Organic Chemicals; 0/Phospholipids

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