Study of soybean and lentil root exudates |
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Authors: | Agnès d'Arcy-Lameta |
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Institution: | (1) Université P. et M. Curie (Paris VI) Laboratoire de Pathologie Végétale, tour 53-4 place Jussieu, F-75252 Paris Cedex 05, France |
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Abstract: | Summary Some polyphenolic compounds have been identified in root exudates of two species of legumes (both cultivated in sterile conditions):
for lentil, three desoxy-5 flavones (4′,7-dihydroxy, 3′,4′,7-trihydroxy and 4′,7-dihydroxy, 3′-methoxyflavones) and for soybean:
two isoflavonoids, coumestrol and daidzein (or 4′,7-dihydroxyisoflavone). Identified compounds are polyphenolic aglycones
whereas roots contain the corresponding glycosides, showing that a hydrolysis takes place at the time of exudation. Compounds
are observed in plantlet exudates as soon as the first day after planting. Their daily quantitative variations parallel those
of total phenolic compounds. Exudated coumestrol and 4′,7-dihydroxyflavone amounts are estimated at about 20% of root content
in these molecules. |
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Keywords: | Coumestrol Daidzein Desoxy-5 flavones First day growth Flavonoids Glycine max Isoflavonoids Lens culinaris Root exudates |
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