Abstract
Plants were regenerated from excised adventitious roots of the rose rootstock ‘Moneyway’ via a three step procedure: callus induction, induction of somatic embryos and shoot development. Callus was induced on excised roots after incubation for 4 weeks in the dark on SH-medium (Schenk and Hildebrandt) containing 50 μM 2,4-dichlorophenoxyacetic acid. For embryo induction, calluses were transferred to hormone-free SH-medium and incubated for 8 weeks. The use of Gelrite instead of agar during callus induction stimulated somatic embryogenesis (up to 16% of the explants formed organized structures), whereas the presence of 6-benzylaminopurine in this phase inhibited subsequent regeneration. Yellow solid calluses with embryo-like cotyledons or primordia and friable calluses with embryos were selected, and upon incubation in the light shoots developed. Shoot development was faster and more frequent on solid callus than on friable callus (64% and 21% of the calluses finally formed one or more shoots, respectively). Eleven out of thirteen regenerants developed similarly to control shoots. Finally this regeneration method is compared with other systems for somatic embryogenesis and opportunities for the production of transgenic rose rootstocks and rose cultivare are discussed.
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Abbreviations
- BAP:
-
6-benzylaminopurine
- BM:
-
basal medium
- BM+:
-
enriched basal medium
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- DAPI-4′,6:
-
diamidino-2-phenylindole
- FeEDDHA:
-
ferric ethylenediamine di(ohydroxyphenylacetate)
- FeEDTA:
-
ferric ethylenediamine tetraacetate
- IBA:
-
indole-3-butyric acid
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van der Salm, T.P.M., van der Toorn, C.J.G., ten Cate Hänisch, C.H. et al. Somatic embryogenesis and shoot regeneration from excised adventitious roots of the rootstock Rosa hybrida L. ‘Moneyway’. Plant Cell Reports 15, 522–526 (1996). https://doi.org/10.1007/BF00232986
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DOI: https://doi.org/10.1007/BF00232986