Effects of belowground biota on primary and secondary metabolites in Brassica oleracea

S. Wurst, R. Langel, S. Rodger, S. Scheu

    Research output: Contribution to journal/periodicalArticleScientificpeer-review

    Abstract

    Soil organisms in direct and indirect interaction with plant roots affect aboveground herbivores, likely by inducing different plant responses. We investigated the combined effects of the root-knot nematode Meloidogyne incognita (in direct interaction with roots) and the endogeic earthworm Octolasion tyrtaeum (in indirect interaction with roots) on the performance of Brassica oleracea. Both earthworms and nematodes increased N uptake and shoot biomass of B. oleracea. Earthworm activity mobilized more soil N than litter N, and herbivory by nematodes tended to increase the microbial biomass in soil. Only the structural class of sulphur containing glucosinolates was affected by the soil organisms. Earthworms decreased glucoiberin concentrations in B. oleracea shoots. Glucoraphanin was affected by an interaction between earthworms and nematodes. [KEYWORDS: Brassica oleracea ; earthworms ; nematodes ; glucosinolates]
    Original languageEnglish
    Pages (from-to)69-73
    JournalChemoecology
    Volume16
    Issue number1
    DOIs
    Publication statusPublished - 2006

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