Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 429506
Title Can the negative plant-soil feedback of Jacobaea vulgaris be explained by autotoxicity?
Author(s) Voorde, T.F.J. van de; Putten, W.H. van der; Bezemer, T.M.
Source Basic and Applied Ecology 13 (2012)6. - ISSN 1439-1791 - p. 533 - 541.
Department(s) Nature Conservation and Plant Ecology
Laboratory of Nematology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) senecio-jacobaea - pyrrolizidine alkaloids - seed-germination - invasive plants - phenolic-acids - allelopathy - growth - succession - field - grassland
Abstract Field and bioassay studies with Jacobaeavulgaris (ragwort) have shown that plants grow poorly in soil originating from the rhizosphere of this species and that this can influence the dynamics of ragwort populations during secondary succession. In the present study we examined whether the negative effect of ragwort on conspecifics may be due to autotoxicity. First, we experimentally established that ragwort exerts negativeplant–soilfeedback. We subsequently examined the inhibitory effects on germination and seedling performance of different strengths of aqueous extracts made from shoot and root tissues of ragwort, and from soil in which ragwort had been growing. The effects of the extracts were tested for seedlings growing in sterilised soil or in glass beads with water. Finally, the inhibitory effect of entire root fragments on seedling performance was tested. We observed that performance of seedlings growing in glass beads was significantly reduced by the high and medium strength root and shoot extracts. Extracts made from soil did not differ significantly from the control, and seedlings growing in sterilised soil were also not affected by ragwort extracts. Seed germination was significantly reduced by the high strength shoot extract only. The root length of seedlings growing in water with root fragments was reduced significantly. We conclude that under laboratory conditions ragwort can be autotoxic and discuss the role that autotoxicity may play in influencing the dynamics of ragwort populations during secondary succession.
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