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Allelopathic effect of Nepeta meyeri Benth. extracts on seed germination and seedling growth of some crop plants

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Abstract

In order to evaluate the allelopathic potential of Nepeta meyeri Benth., the effects of aqueous extracts (0.125, 0.25, 0.5, 1, 2.5 and 5%) prepared from roots and leaves of N. meyeri were studied on the seed germination and seedling growth of several economically important crops (barley, wheat, canola, safflower, and sunflower). Both the root and leaf extracts of N. meyeri caused a general phytotoxic effect on the seed germination and seedling growth of barley and sunflower at all concentrations. However, both the root and leaf extracts significantly increased the seedling growth of wheat, especially at the lower concentrations 0.125, 0.25 and 0.5%, whereas the higher concentrations had a neutral effect. The seed germination and the seedling growth of canola and safflower were also generally improved by both extracts, especially at lower concentrations. However, these advantages were not observed at higher concentrations, at which the extracts mostly had a phytotoxic effect on canola and safflower. The Allelopathic activity of N. meyeri depended on whether the extract was derived from the leaf or root parts of the plant. The maximum allelopathic effect occurred with leaf extracts. The results demonstrate that the aqueous extracts from N. meyeri have allelopathic potential and should be evaluated as an allelopathic species, presenting a risk or advantage to seed germination and seedling growth of crop or weed plants.

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Acknowledgments

This work has been supported by grant from Atatürk University Research Fund, No: BAP-2005/171.

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Authors and Affiliations

  1. Department of Biology, Science and Art Faculty, Atatürk University, 252540, Erzurum, Turkey

    Salih Mutlu & Ökkeş Atici

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  1. Salih Mutlu
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  2. Ökkeş Atici
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Correspondence to Ökkeş Atici.

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Communicated by F. Corbineau.

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Mutlu, S., Atici, Ö. Allelopathic effect of Nepeta meyeri Benth. extracts on seed germination and seedling growth of some crop plants. Acta Physiol Plant 31, 89–93 (2009). https://doi.org/10.1007/s11738-008-0204-0

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  • DOI: https://doi.org/10.1007/s11738-008-0204-0

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