Plant-Growth Inhibitory Activity of Cedrelanolide from Cedrela salvadorensis |
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Authors: | Carlos L Céspedes José S Calderón Juan R Salazar Blas Lotina-Hennsen Rosabel Segura |
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Affiliation: | (1) Instituto de Química, UNAM, Ciudad Universitaria, Coyoacán, 04510 México D.F., México;(2) Facultad de Química, UNAM, Ciudad Universitaria, Coyoacán, 04510 México D.F., México;(3) Facultad de Ciencias, Universidad Nacional de Colombia, Santa Fé de Bogotá, Colombia |
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Abstract: | The effect of cedrelanolide, the most abundant limonoid isolated from Cedrela salvadorensis (Meliaceae), was assayed as a plant-growth inhibitory compound against monocotyledonous and dicotyledonous seeds. This compound inhibited germination, seed respiration, and seedling dry weights of some plant species (Lolium multiflorum, var. Hercules, Triticum vulgare, var. Salamanca, Physalis ixocarpa, and Trifolium alexandrinum). Our results indicate that cedrelanolide interferes with monocot preemergence properties, mainly energy metabolism of the seeds at the level of respiration. In addition, the compound inhibits photophosphorylation, H+ uptake, and noncyclic electron flow. This behavior might be responsible for its plant-growth inhibitory properties and its possible role as an allelopathic agent. |
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Keywords: | Cedrela salvadorensis cedrelanolide Meliaceae phytogrowth inhibition seed respiration Hill reaction inhibitor limonoid nortriterpenoid |
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