Document Detail


Leucopaxillus giganteus mycelium: effect of nitrogen source on organic acids and alkaloids.
MedLine Citation:
PMID:  18494481     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this work was to find the most useful inorganic nitrogen source to enable Leucopaxillus giganteus to become a more nutritious mushroom, regarding organic acid and phenolic composition and total alkaloids content. For these, the influence of NH 4NO 3,NaNO 2, KNO 3,, and (NH 4) 2HPO 4 on the organic acid production was determined by HPLC-UV and total alkaloid content was assessed by a spectrophotometric method, after precipitation by Dragendorff's reagent. The results showed that L. giganteus presented an organic acid profile composed of oxalic, cis-aconitic, citric, and fumaric acids, citric acid being the major one. The quantitative organic acid profile and total alkaloid content were affected by the nitrogen source and depended on the developmental stage of mycelium and nitrogen availability. Despite being present in all samples, no phenolic compound could be identified.
Authors:
Bárbara Ribeiro; Paula B Andrade; Paula Baptista; Lillian Barros; Isabel C F R Ferreira; Rosa M Seabra; Patrícia Valentão
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-05-22
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  56     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-06-19     Completed Date:  2008-09-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4769-74     Citation Subset:  IM    
Affiliation:
REQUI MTE/ Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Aníbal Cunha 164, 4050-047 Porto, Portugal.
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MeSH Terms
Descriptor/Qualifier:
Agaricales / chemistry,  growth & development,  metabolism*
Alkaloids / analysis*
Carboxylic Acids / analysis*
Citric Acid / analysis
Mycelium / chemistry,  growth & development,  metabolism*
Nitrogen Compounds / metabolism*
Phenols / analysis
Phosphates / metabolism
Sodium Nitrite / metabolism
Chemical
Reg. No./Substance:
0/Alkaloids; 0/Carboxylic Acids; 0/Nitrogen Compounds; 0/Phenols; 0/Phosphates; 10124-31-9/ammonium phosphate; 7632-00-0/Sodium Nitrite; 77-92-9/Citric Acid

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