Phytohormone contents in Corylus avellana and their relationship to age and other developmental processes |
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Authors: | Andrés H Fernández B Rodríguez R Rodríguez A |
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Institution: | (1) Unidad Fisiología Vegetal, Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo, C/Catedrático Rodrigo Uría s/n. 33071, Oviedo, Spain;(2) Instituto Universitario de Biotecnología de Asturias (Asociado al C.S.I.C.), 33071 Oviedo, Spain |
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Abstract: | Endogenous levels of indole-3-acetic acid, abscisic acid, and cytokinins (Z-type: dihydrozeatin, dihydrozeatin riboside, zeatin, and zeatin riboside; iP-type: N
6-isopentenyl adenine and N
6-isopentenyl adenosine), were determined in leaves of hazelnut (Corylus avellana L.) (adult material from spring, autumn and forced outgrowth, and juvenile material). Our results showed high levels of indole-3-acetic acid, abscisic acid and total cytokinins in spring samples and low levels of the same hormones in autumn and forced outgrowth materials. The ratios of iP-type/Z-type cytokinins were low in autumn and spring leaves, while they were high in the juvenile and forced outgrowth samples. Both juvenile and forced-outgrowth hazel tissues also showed a high morphogenetic potential, suggesting that the ratio of iP-type/Z-type cytokinins may be a good index of in vitro potential of hazelnut materials. |
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Keywords: | abscisic acid auxins cytokinins hazelnut phase change |
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