ISSN:
1573-5036
Keywords:
alfalfa
;
Fe-deficiency
;
ferric phosphate
;
Fusarium oxysporum f. sp. phaseoli
;
Medicago sativa L.
;
root exudate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00024987
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