Propagation of Ornamental Plants
11(4): 184-188, 2011
PLANT REGENERATION FROM ROOT-TIP CULTURE OF CYRTOPODIUM BRANDONIANUM BARB. RODR. (ORCHIDACEAE)
Eduardo Flachsland, Graciela Terada, José Mourazos Fernández, Ricardo Medina, Aurelio Schinini, Hebe Rey, and Luis Mroginski*
Northeast Institute of Botany (IBONE) – (CONICET) (National Scientific and Technical Research Council) – UNNE (Northeast National University, Sargento Cabral 2139, Corrientes (3400), Argentina, *Fax: + 54-3783-426218, *E-mail: luis@agr.unne.edu.ar
Abstract
A protocol for in vitro plant multiplication of Cyrtopodium brandonianum from root-tip culture was developed. Root tips were dissected from 150 day-old plants, obtained in vitro and were cultured on half-strength MS medium, supplemented with different concentrations of BAP, kinetin, zeatin, tidiazuron, and 2iP for induction of adventitious shoots. After 60-70 days of incubation, shoot differentiation could be distinguished. The half-strength MS medium supplemented with 0.5 mg l-1 TDZ showed the best response on shoot production, with, in average, 43% of the explants with shoots. Optimal rooting (20% of shoots with an average of 4.3 roots per explants), with no intervening callus was observed in medium containing half-strength MS medium, with 6% sucrose and 1 mg l-1 NAA.
Key words: Cyrtopodium brandonianum, in vitro plant regeneration, orchids, plant growth regulators, root-tip culture
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