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Type of publication: Journal Article
Type of document: Full Paper

Year: 2010

Authors: Nell, M; Wawrosch, C; Steinkellner, S; Vierheilig, H; Kopp, B; Lössl, A; Franz, C; Novak, J; Zitterl-Eglseer, K

Title: Root colonization by symbiotic arbuscular mycorrhizal fungi increases sesquiterpenic acid concentrations in Valeriana officinalis L.

Source: Planta Med. 2010; 76(4):393-398

Authors Vetmeduni Vienna:

Franz Chlodwig
Nell Monika
Novak Johannes
Zitterl-Eglseer Karin

Vetmed Research Units
Institute of Animal Nutrition and Functional Plant Compounds

In some medicinal plants a specific plant-fungus association, known as arbuscular mycorrhizal (AM) symbiosis, increases the levels of secondary plant metabolites and/or plant growth. In this study, the effects of three different AM treatments on biomass and sesquiterpenic acid concentrations in two IN VITRO propagated genotypes of valerian ( VALERIANA OFFICINALIS L., Valerianaceae) were investigated. Valerenic, acetoxyvalerenic and hydroxyvalerenic acid levels were analyzed in the rhizome and in two root fractions. Two of the AM treatments significantly increased the levels of sesquiterpenic acids in the underground parts of valerian. These treatments, however, influenced the biomass of rhizomes and roots negatively. Therefore this observed increase was not accompanied by an increase in yield of sesquiterpenic acids per plant. Furthermore, one of the two genotypes had remarkably high hydroxyvalerenic acid contents and can be regarded as a hydroxyvalerenic acid chemotype.

Keywords Pubmed: Biomass
Plant Extracts/metabolism*
Plant Roots/growth & development*
Valerian/growth & development

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