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Plant regeneration via somatic embryogenesis from protoplasts of six plant species related to Citrus

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Abstract

Protoplasts isolated from embryogenic callus of Fortunella polyandra (Ridl.), Atalantia bilocularis (Pieree ex Guill.), Hesperethusa crenulata (Roxb.), Glycosmis pentaphylla (Retz.) Corr., Triphasia trifolia (Burm. f.) P. Wils. and Murraya koenigii (L.) Spreng. were cultured in MT (Murashige and Tucker 1969) basal medium containing 5% sucrose supplemented with 0.0, 0.001, 0.01, 0.1 or 1.0 mg l−1 BA and 0.6 M sorbitol. The highest plating efficiencies for all species were obtained on MT basal medium containing 5% sucrose supplemented with 0.001 mg l−1 BA. F. polyandra produced higher percentages of globular somatic embryo development, while A. bilocularis consistently showed a lower percentage of globular somatic embryo development in all 5 concentrations of BA. MT basal medium containing 5% sucrose and supplemented with 0.001 mg l−1 BA was found to be a suitable medium for development of globular somatic embryos derived from protoplasts to form heart-shaped somatic embryos with cotyledon-like structures. The highest percentages of shoot formation for all 6 species were obtained using 0.1 mg l−1 GA3. A complete protoplast-to-plant system was developed for F. polyandra, A. bilocularis and T. trifolia, which could facilitate the transfer of nuclear and cytoplasmic genes from these species into cultivated Citrus through protoplast fusion.

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Abbreviations

BA:

N6-benzyladenine

2,4-D:

2,4-dichlorophenoxyacetic acid

FDA:

fluorescein diacetate

GA3 :

gibberellin A3

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Communicated by G. C. Phillips

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Jumin, H.B., Nito, N. Plant regeneration via somatic embryogenesis from protoplasts of six plant species related to Citrus . Plant Cell Reports 15, 332–336 (1996). https://doi.org/10.1007/BF00232366

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Keywords

  • Sucrose
  • Plant Species
  • Somatic Embryo
  • Basal Medium
  • Somatic Embryogenesis