Rooting effects of auxins on shoots of mangrove plants

• Main Authors: Alde, Rezelyn R., Barillos, Chanda Marie O., Canlas, Clarice G., Gonzalez, Imee D., Roque, Ma. Philina S.
• Format: text
• Language: English
• Published: Animo Repository 1997
• Subjects: Auxin; Mangrove plants; Plant hormones; Roots (Botany); Shoots (Botany); Plant propagation
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/6042
• Institution: De La Salle University

Avicennia marina (Forsk.) Vierh. (bungalon) and Lumnitzera racemosa Willd. (kulasi) are mangrove species that can be vegetatively propagated by stem cutting because of their ability to form roots on cuttings. On the other hand, Rhizophora apiculata Lam. (bakauan lalake), Rhizophora stylosa Griff. (bakauan bato), and Rhizophora mucronata Blume. (bakauan babae) cuttings did not form root though some of them survived. A total of two hundred seventy cuttings for each mangrove species were soaked in auxins: namely Indoleacetic Acid (1AA), Napthalene acetic acid (NAA), and 2,4-Dichlorophenoxyacetic acid (2,4-D) at 0.375mM, 0.125 mM, 0.0125 mM concentrations respectively and another ninety cuttings were used as control for each mangrove species which were soaked in distilled water. Observations made after 4, 7 and 10 weeks showed the following responses: browning, yellowing or whitening of the base, formation of adventitious roots, and emergence of leaves. Survival percentage for every treatment and type of auxin were noted. Among the auxins used, 1AA was found to enhance the rootability of the cuttings. Although Lumnitzera racemosa exhibited root formation, it could not be considered efficient since it had a low percentage of survival of 7.00.