Laticifer systems in Mandevilla illustris and M. velutina apocynaceae

• Main Authors: Beatriz Appezzato-Da-Gloria, Maria E. Maranhão Estelita
• Format: Article
• Language: English
• Published: Polish Botanical Society 2014-01-01
• Series: Acta Societatis Botanicorum Poloniae
• Subjects: Non-articulated laticifer; Mandevilla; Apocynaceae
• Online Access: https://pbsociety.org.pl/journals/index.php/asbp/article/view/887

Two Apocynaceae species from savanna (Cerrado) area of Sao Paulo State, Brazil were studied. In both Mandevilla species examined, the laticifer systems are of non-articulated branched type, characteristic of the family. In vegetative organs reported was the occurrence of a primary laticifer system of which the cells were differentiated in the embryo. However, additional laticifer cells were always produced during the growth of the shoot apex. A secondary laticiferous system produced by the cells of vascular cambium was identified in the tuberous root and in the stem. A proposed discussion on this apparently unique record in Apocynaceae was arisen to evaluate the main distinction between articulated and non-articulated laticifers.