The localization of secondary substances in Hypericum perforatum flower
1997
Repcak, M. | Martonfi, P. (P.J. Safarik Univ., Kosice (Slovakia). Dept. of Experimental Botany and Genetics)
The localisation of naphthodianthrones, acylphloroglucinols and flavonoids in main flower parts of Hypericum perforatum was studied. Distribution patterns of flavonol quercetin monosides quercetin, hyperoside and isoquercitrin are similar. The highest content of quercetin glycosides is found in sepals and petals. Diglycoside rutin is more accumulated in sepals and less in stamens. Biflavonoid 3.8" -biapigenin is present in all the flower parts studied but the highest content was found in stamens and petals. In organs where plant gametes are formed (stamens and pistils) naphthodianthrones hypericin and pseudohypericin are accumulated in stamens and petals. Acylphoroglucinols hyperforin and adhyperforin are present at a high percentage (7.1 percent) in pistils and are absent from stamens. Different accumulation of naphthodianthrones and acylphloroglucinols in particular floral parts can be connected with specific defensive role of individual compound and other phenomena of plant reproduction
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