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  • Title: Acceleration of adventitious shoots by interaction between exogenous hormone and adenine sulphate in Althaea officinalis L.
    Author: Naz R, Anis M.
    Journal: Appl Biochem Biotechnol; 2012 Nov; 168(5):1239-55. PubMed ID: 23001529.
    Abstract:
    In the current study attempts were made to investigate the effects of three different phases of callus induction followed by adventitious regeneration from leaf segments (central and lateral vein). Callus induction was observed in Murashige and Skoog's (MS) medium supplemented with 15.0 μM 2,4-dichloro phenoxy acetic acid (2,4-D). Adventitious shoot buds formation was achieved on MS medium supplemented with 7.5 μM 2,4-D and 20.0 μM AdS in liquid medium as it induced 19.2 ± 0.58 buds in central vein explants. Addition of different growth regulators (cytokinins-6-benzyladenine, kinetin and 2-isopentenyl adenine alone or in combination with auxins-indole-3-acetic acid, indole-3-butyric acid and α-naphthalene acetic acid, improved the shoot regeneration efficiency, in which 5.0 μM 6-benzyl adenine along with 0.25 μM α-naphthalene acetic acid was shown to be the most effective medium for maximum shoot regeneration (81.3 %) with 24.6 number of shoots and 4.4 ± 0.08 cm shoot length per explant. Leaf culture of central veins led to better shoot formation capacity in comparison to lateral vein. Rooting was readily achieved on the differentiated shoots on 1/2 MS medium augmented with 20.0 μM indole-3-butyric acid. The plants were successfully hardened off in sterile soilrite followed by their establishment in garden soil with 80 % survival rate.
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