| Effect of nitrogen source in the fertilizing solution on nutritional quality of three members of the Portulaca oleracea aggregate. | |
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MedLine Citation:
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PMID: 20572061 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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BACKGROUND: Portulaca oleracea (purslane) is nutritious but, in addition to the essential alpha-linolenic acid, vitamin C and tocopherols, it contains undesirable oxalic acid. Knowing the effects of nitrate and ammonium on oxalate accumulation, we tested the agronomic potential of three members of the P. oleracea aggregate under various nitrogen fertilization conditions, by measuring biomass production and accumulation of fatty acids, organic acids and tocopherol in the commercial P. sativa (Pos) and two natural members: P. nitida (Pon) and P. papillato-stellulata (Pop). RESULTS: With nitrate as the sole N source, we measured differences between Pon and Pos in concentrations of the essential omega-3 fatty acid alpha-linolenic acid. Pos also gained less dry biomass under these conditions, implying a higher agronomical and nutritional value for Pon. Increasing the fertilizer ammonium concentration and reducing that of nitrate significantly decreased oxalic acid by factors of up to 1.7, 2.6 and 3.4 in Pos, Pop and Pon, respectively, significantly increased concentrations of tocopherol and malic acid, had no effect on fatty acids or ascorbic acid, but reduced biomass. CONCLUSION: In spite of the recumbent growth habit of Pon, the present findings indicate its agronomic potential. Because early flowering and seed production may be the limiting factors in purslane agriculture, growing Pon in nitrate-poor conditions might be agriculturally favorable. |
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Authors:
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Gabriella Szalai; Nir Dai; Avinoam Danin; Nativ Dudai; Oz Barazani |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of the science of food and agriculture Volume: 90 ISSN: 1097-0010 ISO Abbreviation: J. Sci. Food Agric. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376334 Medline TA: J Sci Food Agric Country: England |
Other Details:
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Languages: eng Pagination: 2039-45 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Society of Chemical Industry. |
Affiliation:
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Agricultural Research Institute of the Hungarian Academy of Sciences, H-2462 Martonvasar, Hungary. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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