Phytogrowth Properties of Limonoids Isolated from Cedrela ciliolata |
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Authors: | Carlos L. Céspedes José S. Calderón Federico Gomez-Garibay Rosabel Segura Beatriz King-Diaz Blas Lotina-Hennsen |
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Affiliation: | (1) Instituto de Química, UNAM, Ciudad Universitaria, México, 04510, D.F.;(2) Facultad de Ciencias, Universidad Nacional de Colombia, Santa Fé de Bogotá, Colombia;(3) Facultad de Química, Departamento de Bioquímica, UNAM, Ciudad Universitaria, México, 04510, D.F. |
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Abstract: | An epimeric mixture of the limonoid photogedunin, isolated from the heartwood of C. ciliolata, as well as its R- and S-acetate derivative were evaluated for phytotoxicity in mono- and dicotyledoneous plants. A mixture of epimeric photogedunin 1 and 2, a mixture of epimeric photogedunin acetate, (R)-photogedunin acetate 3, and (S)-photogedunin acetate 4 inhibited seed germination, seedling growth, and root and hypocotyl/coleoptyle growth in all species assayed. The concentration of phytochemicals required for 50% inhibition ranged from 4.5 to 300 M. Inhibitory plant responses appeared to require that the OH-group at C-23 be acetylated in photogedunin, since the nonacetylated compound showed less phytotoxic activity. |
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Keywords: | Cedrela ciliolata photogedunin photogedunin acetates phytogrowth inhibition seed respiration |
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