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Histology of somatic embryogenesis from floral tissues cocoa

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Abstract

Somatic embryogenesis fromTheobroma cacao L. flower buds, as previously reported on five Forastero hybrid genotypes, was tested on several other genotypes, belonging to the three cocoa-tree groups: Forastero, Trinitario and Criollo. The results gave evidence of genotypic efficiencies. Explants were cultivated under two successive conditions: callogenesis and expression media. The morphological and histological responses were different for embryogenic or non-embryogenic genotypes. For embryogenic genotypes, only staminodes and stamen filaments were able to produce somatic embryos: after a few days on the expression medium, groups of callus cells went through the meristematic and then embryonic stages, and finally formed somatic embryos. Many of them showed abnormalities. Simultaneously, some embryogenic cells were visible. These started to divide to form pro-embryos which however were unable to evolve into proper somatic embryos.

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Authors and Affiliations

  1. BIOTROP-GERDAT Laboratory, CIRAD-CP, BP 5035, F-34032, Montpellier Cedex 01, France

    L. Alemanno, M. Berthouly & N. Michaux-Ferrière

Authors
  1. L. Alemanno
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  2. M. Berthouly
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  3. N. Michaux-Ferrière
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Alemanno, L., Berthouly, M. & Michaux-Ferrière, N. Histology of somatic embryogenesis from floral tissues cocoa. Plant Cell Tiss Organ Cult 46, 187–194 (1996). https://doi.org/10.1007/BF02307094

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  • DOI: https://doi.org/10.1007/BF02307094

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