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Genotype and plant growth regulator-dependent response of somatic embryogenesis from Gentiana spp. leaf explants

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Abstract

Gentiana kurroo (Royle), Gentiana cruciata (L.), Gentiana tibetica (King. ex Hook. f.), Gentiana lutea (L.), and Gentiana pannonica (Scop.) leaves derived from axenic shoot culture were used as explants. For culture initiation, leaves from the first and second whorls from the apical dome were dissected and cultured on Murashige and Skoog (MS) basal medium supplemented with three different auxins: 2,4-dichlorophenoxyacetic acid, 1-naphthaleneacetic acid (NAA), or 3,6-dichloro-o-anisic acid (dicamba) in concentrations of 0.5, 1.0, or 2.0 mg/l; and five different cytokinins: zeatin, 6-furfurylamonopurine (kinetin), N-phenyl-N′-1,2,3-thiadiazol-5-ylurea (TDZ), N-(2-chloro-4-pyridyl)N′-phenylurea, or 6-benzylaminopurine (BAP). The cytokinin concentrations used were dependent on the type of cytokinin and varied between 0.25 and 3.0 mg/l. After 2 mo. of culture, the morphogenic response of explants was assessed. Frequency of embryogenesis was the highest for G. kurroo (54.7%) and dependent on plant growth hormones (PGRs). This gentian was the only species showing morphogenic capabilities on media supplemented with all applied combinations of PGRs, while none of the 189 induction media permutations stimulated somatic embryogenesis from G. lutea explants. G. tibetica and G. cruciata both produced an average of 6.6 somatic embryos per explant, while G. pannonica and G. kurroo regenerated at 15.7 and 14.2 somatic embryos per explant, respectively. Optimum regeneration was achieved in the presence of NAA combined with BAP or TDZ. This auxin also stimulated abundant rhizogenesis. Somatic embryos were also regenerated from adventitious roots of G. kurroo, G. cruciata, and G. pannonica. Somatic embryos converted into plantlets on half strength MS medium.

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  1. Botanical Garden—Center for Biological Diversity Conservation, Polish Academy of Sciences, Prawdziwka 2 Str., 02-973, Warsaw, Poland

    Agnieszka Fiuk & Jan J. Rybczyński

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  1. Agnieszka Fiuk
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  2. Jan J. Rybczyński
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Correspondence to Agnieszka Fiuk.

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Editor: Nigel Taylor

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Fiuk, A., Rybczyński, J.J. Genotype and plant growth regulator-dependent response of somatic embryogenesis from Gentiana spp. leaf explants. In Vitro Cell.Dev.Biol.-Plant 44, 90–99 (2008). https://doi.org/10.1007/s11627-008-9124-3

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  • DOI: https://doi.org/10.1007/s11627-008-9124-3

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