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In vitro regeneration of Didymopanax morototoni
E T H Franco1, L B Gavioli, A G Ferreira
1Departamento de Biologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
Abstract:
The present study aimed at establishing a complete plant regeneration protocol for Didymopanax morototoni (matchwood), a native Brazilian forest species. Four types of explants (root, shoot, node, and cotyledonary leaves) were obtained from in vitro germinated seeds. In the first step, woody plant medium (WPM) with casein hydrolysate (250 mgL-1 ) and 2,4-D (1.0 and 5.0 mgL-1) were used combined with kinetin (0.1 and 1.0 mgL-1). Twenty days after inoculation, the material was evaluated. Embryogenic calli were split, transferred to expression medium with several combinations of NAA and KIN, and moved to fresh medium after 60 days. Light did not interfere in embryo expression. Somatic embryos were formed either from individual cells or cell clusters. Plantlets were obtained in WPM medium and 10 gL-1 of sucrose with no plant regulator, or using 0.1 mgL-1 BAP and 0.5 mgL-1GA. Plantlets from somatic embryos of D. morototoni developed in 33% of the cases.
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