Abstract
A method for the production of somatic embryos and subsequent plant regeneration for Anthurium andraeanum Linden ex André (Monocotyledonae) hybrids is described. Whole leaf blade explants, derived from plantlets grown in vitro, formed translucent embryogénic calli at their basal ends within one month of culture in the dark. Secondary somatic embryos formed frequently and without an intervening callus on surfaces of primary embryos. Embryogenesis was induced with three genotypes using a modified half-strength Murashige and Skoog (MS) medium supplemented with 1.0 to 4.0 mg l(-1) 2,4-dichlorophenoxyacetic acid (2,4-D) and 0.33 to 1.0 mg l(-1) kinetin. A combination of 2% sucrose with 1% glucose in the medium favored embryogenesis over 3% sucrose alone. Whole leaf blades on medium solidified with 0.18% Gelrite produced more somatic embryos than leaves on medium with 0.7% Bacto-agar. Within two to three months after culture initiation, embryos were transferred to modified MS medium containing 0.2 mg l(-1) 6-benzyladenine (BA) and 2% sucrose and placed in the light for conversion into plantlets. Rooted plantlets were recovered and transferred into pots with tree fern fiber medium and grown in the greenhouse.
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