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Effect of mycorrhization on the accumulation of rishitin and solavetivone in potato plantlets challenged with Rhizoctonia solani

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Abstract

The effect of colonization with the vesicular-arbuscular mycorrhizal fungus Glomus etunicatum on the content of rishitin and solavetivone was determined in potato plants cv. Goldrush challenged with Rhizoctonia solani. Mycorrhization stimulated significantly the accumulation of both phytoalexins in roots of plantlets challenged with R. solani but did not influence phytoalexin levels in non-challenged plantlet roots. No accumulation of solavetivone or rishitin was detected in shoots. In Petri dish bioassays, rishitin and solavetivone inhibited mycelial growth of R. solani.

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Acknowledgements

This study was supported by NSERC and Premier Tech (Rivière-du-Loup, Québec, Canada). We thank Caroline Labbé for assistance in various analyses.

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Authors and Affiliations

  1. Centre de Recherche en Horticulture, Université Laval, Québec , Québec, G1K 7P4, Canada

    M. K. Yao, H. Désilets, R. Boulanger & R. J. Tweddell

  2. Agriculture and Agri-Food Canada, 430 boulevard Gouin, St-Jean-sur-Richelieu, Québec, J3B 3E6, Canada

    M. T. Charles

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  1. M. K. Yao
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  2. H. Désilets
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  3. M. T. Charles
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  4. R. Boulanger
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  5. R. J. Tweddell
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Correspondence to R. J. Tweddell.

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Yao, M.K., Désilets, H., Charles, M.T. et al. Effect of mycorrhization on the accumulation of rishitin and solavetivone in potato plantlets challenged with Rhizoctonia solani . Mycorrhiza 13, 333–336 (2003). https://doi.org/10.1007/s00572-003-0267-0

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