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Plants 2019, 8(2), 27;

Autotoxicity of Diterpenes Present in Leaves of Cistus ladanifer L.

Department of Plant Biology, Ecology and Earth Sciences, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain
Author to whom correspondence should be addressed.
Received: 21 December 2018 / Revised: 12 January 2019 / Accepted: 15 January 2019 / Published: 22 January 2019
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Cistus ladanifer has been described as an allelopathic and autoallelopathic species, and the compounds that could be involved in its autotoxicity are the flavonoids and diterpenes present in the exudate of its leaves. The aim of this study was to determine which family of compounds, either phenols or terpenes, are responsible for the autoallelopathic activity quantified in C. ladanifer. These compounds were extracted from the exudate of young leaves collected in spring and separated by column chromatography into two fractions: diterpenes and flavonoids. The obtained results showed that flavonoids, at the tested concentrations, did not have a negative effect on any of the parameters quantified in the germination process of C. ladanifer seeds. On the other hand, the germination, seedling size and seedling establishment, quantified through the germination index and rate, were negatively affected by the tested diterpene solutions. In view of the obtained results, it was concluded that the compounds involved in the autoallelopathy process of C. ladanifer are diterpenes. View Full-Text
Keywords: autoallelopathy; terpenes; phenols autoallelopathy; terpenes; phenols

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Chaves Lobón, N.; Ferrer de la Cruz, I.; Alías Gallego, J.C. Autotoxicity of Diterpenes Present in Leaves of Cistus ladanifer L.. Plants 2019, 8, 27.

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