Dissolution of ferric phosphate by alfalfa (Medicago sativa L.) root exudates
Masaoka, Y. ; Kojima, M. ; Sugihara, S. ; Yoshihara, T. ; Koshino, M. ; Ichihara, A.
Springer
Published 1993
Springer
Published 1993
ISSN: |
1573-5036
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Keywords: |
alfalfa ; Fe-deficiency ; ferric phosphate ; Fusarium oxysporum f. sp. phaseoli ; Medicago sativa L. ; root exudate
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Source: |
Springer Online Journal Archives 1860-2000
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Topics: |
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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Notes: |
Abstract Alfalfa (Medicago sativa L.) was grown in hydroponic culture to investigate adaptation to Fe-deficiency. Root exudates released into the nutrient solution from Fe-deficient plants were trapped and condensed on an amberlite XAD-4 resin column. The diethyl ether fraction of these exudates dissolved ferric phosphate remarkably. The dissolving capability was about 62 times higher than that of root exudates obtained from Fe-sufficient plants in complete nutrient solution. The Fe-dissolving compound was separated and identified. It was a new natural compound with molecular formula C14H10O5 and was identified as 2-(3′,5′-dihydroxyphenyl)-5,6-dihydroxybenzofuran by means of mass spectrometry and 1H-nuclear magnetic resonance. This new compound worked as a phytoalexin and inhibited completely the fungal growth of Fusarium oxysporum f. sp. phaseoli.
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Type of Medium: |
Electronic Resource
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URL: |