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Plant regeneration from haploid cell suspension-derived protoplasts of Mediterranean rice (Oryza sativa L. cv. Miara)

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Abstract

More than 750 plants were regenerated from protoplasts isolated from microspore callus-derived cell suspensions of the Mediterranean japonica rice Miara, using a nurse-feeder technique and N6-based culture medium. The mean plating efficiency and the mean regeneration ability of the protocalluses were 0.5% and 49% respectively. Flow cytometric evaluation of the DNA contents of 7 month old-cell and protoplast suspensions showed that they were still haploid. Contrastingly, the DNA contents of leaf cell nuclei of the regenerated protoclones ranged from 1C to 5C including 60% 2C plants. This was consistent with the morphological type and the fertility of the mature plants. These results and the absence of chimeric plants suggest that polyploidization occurred during the early phase of protoplast culture.

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Abbreviations

BAP:

6-benzylamino purine

2,4-D:

2,4-dichlorophenoxyacetic acid

FDA:

fluorescein diacetate

GA3:

gibberellic acid

NAA:

α-naphthaleneacetic acid

PAS:

periodic acid Schiff

PCM:

protoplast culture medium

PCV:

packed cell volume

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Authors and Affiliations

  1. IRAT-CIRAD, BIOTROP-GERDAT Laboratory, BP5035, 34032, Montpellier Cédex 01, France

    E. Guiderdoni & H. Chaïr

Authors
  1. E. Guiderdoni
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  2. H. Chaïr
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Communicated by A. M. Boudet

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Guiderdoni, E., Chaïr, H. Plant regeneration from haploid cell suspension-derived protoplasts of Mediterranean rice (Oryza sativa L. cv. Miara). Plant Cell Reports 11, 618–622 (1992). https://doi.org/10.1007/BF00236385

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  • DOI: https://doi.org/10.1007/BF00236385

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