In vitro plant regeneration via somatic embryogenesis from root culture of some rhizomatous irises

Geneviève Laublin, Hargurdeep S. Saini, Mario Cappadocia

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Abstract

A method for plant regeneration of Iris via somatic embryogenesis is described. Root and leaf pieces from in vitro-grown plants of several genotypes of rhizomatous Iris sp. were cultured in vitro. Callus induction occurred only on root cultures incubated under low light intensity (35 μmol m-2 s-1) on two induction media containing 2,4-D (4.5 or 22.5 μM), NAA (5.4 μM) and kinetin (0.5 μM). Somatic embryos developed after transfer of callus onto four regeneration media containing 9 or 22 μM BA, or 5 μM kinetin and 2 μM TIBA or 9 μM BA and 4 μM TIBA. Plantlets could be obtained from these somatic embryos. Genotypic differences were found both in callus induction and somatic embryo formation, with I. pseudacorus responding better than I. versicolor or I. setosa. Cytological analysis performed on root tips of 80 regenerated plants revealed that two of the I. pseudacorus regenerants were tetraploid.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalPlant Cell, Tissue and Organ Culture
Volume27
Issue number1
DOIs
Publication statusPublished - 1 Oct 1991
Externally publishedYes

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