ISSN 2226-3063 e-ISSN 2227-9555 Modern Phytomorphology 11: 99–104, 2017 doi: 10.5281/zenodo.1039717 CORRESPONDENCE Influence of different concentrations of jasmonic acid on in vitro development of Catasetum fimbriatum Lindl. (Orchidaceae) Juliana Antunes Silva Maia, Cristiano Pedroso-de-Moraes * Botany and Environment Laboratory, Hermínio Ometto University Center – Uniararas, Maximilano Baruto Av. 500, Jardim Universitário, 13600-000 Araras, São Paulo, Brazil; *
[email protected] Received: 21.05.2017 | Accepted: 23.07.2017 | Published: 31.10.2017 Abstract In vitro seeding constitutes an indispensable tool for propagation of the main commercial species of orchids. This study aimed to analyze the in vitro development of Catasetum fimbriatum under different concentrations of jasmonic acid in Murashige & Skoog culture medium compound of ½ macronutrients. After 180 days of cultivation, concentration of 0.25 and 0.50 μL • L-1 caused a significant increase in number of roots and leaves. The concentration of 1.00 μL • L-1 showed the best result for the length of longest root and largest leaf, the total length of seedling, and the total fresh and dry masses. Nevertheless, the use of this plant regulator on in vitro culture media still requires further investigations to determine the optimal concentration in order to obtain desirable phytotechnical characteristics in different orchid species. Keywords: Catasetum fimbriatum, jasmonic acid, plant regulator, in vitro propagation Introduction et al. 2012). These deciduous, sympodially growing orchids have well developed pseudo‑ Including 7 genera that inhabit tropical regions of bulbs, related to the storage of water during the Americas, Catasetinae Lindl. (Orchidaceae) periods of drought (Dodson 1975; Moraes & spreads from sea level to locations with more Almeida 2004).