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 1 H-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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© 1993 Springer Science+Business Media Dordrecht
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Masaoka, Y., Kojima, M., Sugihara, S., Yoshihara, T., Koshino, M., Ichihara, A. (1993). Dissolution of ferric phosphate by alfalfa (Medicago sativa L.) root exudates. In: Barrow, N.J. (eds) Plant Nutrition — from Genetic Engineering to Field Practice. Developments in Plant and Soil Sciences, vol 54. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1880-4_8
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DOI: https://doi.org/10.1007/978-94-011-1880-4_8
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