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Plant regeneration from explant and protoplast derived calluses of Medicago littoralis



Plant regeneration from explant and protoplast derived calluses of Medicago littoralis



Plant cell tissue and organ culture 41(1): 41-48



Plant regeneration from explant and protoplast derived callus has been achieved in Medicago littoralis cv. Harbinger 1886, an annual legume resistant to the fungus Pseudopeziza medicaginis. Callus was induced from different tissue explants and the fastest growth rate was observed for hypocotyls in B5 medium with 2 mg l-1 2,4 dichlorophenoxyacetic acid and 0.5 mg l-1 N6-benzyladenine. Protoplasts were isolated from cotyledons and leaves of sterile plants and from callus; the first two kinds of protoplasts showed a plating efficiency of 5.6% and 5%, respectively, when embedded in agarose. Plant regeneration occurred on media containing N6-delta 2-isopentenyl-adenine combined with indole-3-acetic acid or 1,2-benzisoxazole-3-acetic acid, and on media with N6-benzyladenine plus alpha-naphtaleneacetic acid; a cytokinin/auxin ratio higher than 1 induced embryos while a ratio around 1 stimulated shoot formation. Embryo development and rooting of shoots were performed in RL medium without growth regulators.

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Accession: 002672697

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DOI: 10.1007/bf00124085


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