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Articles containing the keyword 'histology'

Category : Research article

article id 916, category Research article

M. Carmen San José, Lourdes Romero, Laura V. Janeiro. (2012). Effect of indole-3-butyric acid on root formation in Alnus glutinosa microcuttings. Silva Fennica vol. 46 no. 5 article id 916. https://doi.org/10.14214/sf.916

Keywords: alder; mature trees; histology; rooting

Abstract | View details | Full text in PDF | Author Info

A study of the in vitro rooting process in mature alder (Alnus glutinosa (L.) Gaertn.) shoots is described. Microcuttings from shoots cultured in vitro were transferred to a half-strength Woody Plant Medium containing 0 or 0.1 mg l^–1 indole-3-butyric acid (IBA) for 0 to 7 days. The presence of IBA in the medium increased the rooting percentage, number of roots, percentage of lateral roots, and length of the shoots. Histological studies were carried out with shoots treated with 0 or 0.1 mg l^–1 IBA for 7 days. According to these criteria, treatment with IBA for 2–3 days proved to be the most successful. In both treatments, substancial reactivation of cell division was observed at the base of the shoots after 1 day. Some cambial zone and adjacent phloem cells became dense cytoplasm, having nuclei with prominent nucleoli. The first cell divisions were also observed at this time. In the treatment with IBA (0.1 mg l^–1 for 7 days), meristemoids became individualized, consisting of densely staining cells, by day 3. Identifiable conical shaped root primordia with several cell layers were visible after 4–5 days. Roots with an organized tissue system emerged from the stem after 6 days in the IBA-treated shoots. Meristemoid formation was delayed until the fourth day and root emergence until the eight day in the control treatment (no IBA).

San José, Instituto de Investigaciones Agrobiológicas de Galicia, CSIC, Avda de Vigo s/n, Apartado 122, 15780 Santiago de Compostela, Spain E-mail: sanjose@iiag.csic.es
Romero, CIFP Politécnico de Santiago, Santiago de Compostela, Spain E-mail: lr@nn.es
Janeiro, INLUDES, Diputación Provincial de Lugo, Lugo, Spain E-mail: lauravj68@hotmail.com

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