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Influence of benzyladenine and gibberellic acid on organogenesis in lsquo;Crimson Giantrsquo; Easter cactus

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Abstract

Experiments were performed to determine the influence of gibberellic acid (GA3) and benzyladenine (BA) on organogenesis of lsquo;Crimson Giantrsquo; Easter cactus [Hatiora gaertneri (Regel) Barthlott] phylloclades cultured in vitro. The numbers of flower buds and new phylloclades increased linearly as BA concentration increased from 0 to 444.1 micro;M. GA3 increased the number of new phylloclades when present in moderate concentrations (2.9 or 28.9 micro;M), but inhibited flower bud formation when present in concentrations as low as 0.3 micro;M. The inhibitory effect of GA3 on flower bud formation was diminished when the medium was amended with BA at 44.4 or 444.1 micro;M. Explants cultured in media that contained 288.7 micro;M GA3 produced fewer organs (new phylloclades plus flower buds) compared to those cultured in media with 0, 0.3, 2.9, or 28.9 micro;M GA3. BA and GA3 concentrations also affected the percentage of explants with flower buds and the percentage of explants with new phylloclades. This study shows that organogenesis in H. gaertneri can be controlled by varying the concentrations of BA and GA3 in the culture medium.

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Authors and Affiliations

  1. Department of Plant and Soil Sciences, French Hall, University of Massachusetts, Amherst, MA, 01003, USA

    Thomas H. Boyle & Micahel Marcotrigiano

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  1. Thomas H. Boyle
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  2. Micahel Marcotrigiano
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Boyle, T.H., Marcotrigiano, M. Influence of benzyladenine and gibberellic acid on organogenesis in lsquo;Crimson Giantrsquo; Easter cactus. Plant Growth Regulation 22, 131–136 (1997). https://doi.org/10.1023/A:1005838609444

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  • DOI: https://doi.org/10.1023/A:1005838609444

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