Journal
PLANTA MEDICA
Volume 76, Issue 4, Pages 393-398Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0029-1186180
Keywords
Valenana officinalis; Valerianaceae; valenan; arbuscular mycorrhiza; sesquiterpenic acids; in vitro propagation; hydroxyvalerenic acid chemotype
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Funding
- Austrian Science Fund FWF [L194-B06]
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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 valerenic acid chemotype.
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