Flavonoids of Lotus tenuis (Waldst. & Kit.) as markers of populations growing in soils of different saline and hydrologic conditions

Journal of the Brazilian Chemical Society

Graciela Ferraro²  Filip Rosana²  María A. Del Pero²  Norma Basualdo²  Rodolfo Mendoza¹  Ileana García¹ 

[1] ,University of Buenos Aires CONICET IQUIMEFABuenos Aires,Argentina

关键词: Lotus tenuis;    flavonoids;    ecotype;    environment adaptation;    soil gradient;   

DOI  :  10.1590/S0103-50532010000900021

来源: SciELO

【 摘 要 】

Lotus tenuis Waldst. et Kit. (=Lotus glaber Mill.) is a widely spread leguminous plant which grows naturally in low grasslands of the Flooding Pampas of Argentina. One of the hypothesis to explain the succesful spread of L. tenuis in this area, is the ecotypes differentiation. The aim of this work was to investigate the flavonoid compounds present in L. tenuis plant populations which grow in a variety of soils. Individuals from five populations growing in soils having different characterisctics were collected, cultivated in a glasshouse and compared according to their flavonoid profile. Glycosides of the following flavonoids were detected: quercetin, quercetin 7-methyl ether, kaempferol, kaempferol 7-methyl ether and isorhamnetin. Only those samples from a saline-sodic lowland, showed methylated aglycones: kaempferol 7-methyl ether and quercetin 7- methyl ether. The latter compounds could therefore be considered the expression of a biochemical adaptation and suggest an ecotype differentiation.

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