Somatic embryogenesis and plant regeneration from protoplasts of Cichorium intybus L. x Cichorium endivia L. |
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Authors: | R Sidikou-Seyni C Rambaud J Dubois J Vasseur |
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Institution: | 2. Physiologie de la Différenciation et Biotechnologies végétales, Université des Sciences et Techniques de Lille-Flandres-Artois, 59655, Villeneuve d'Ascq cedex, France
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Abstract: | Somatic embryos and adult plants were regenerated from mesophyll protoplasts of a clone of chicory 474 (Cichorium intybus L. x Cichorium endivia L.). Embryos were obtained in three different ways: |
- plating of 7-day-old protoplast cultures on PM-3 solid induction medium with 2.5 M 2-isopentenyladenine (2-iP) and 0.5 M naphthaleneacetic acid (NAA);
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- transfer of 1–2 mm microcolonies into liquid M-17 induction medium with 2.5 M (2-iP) and 0.1 M (NAA);
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- transfer of well-established protoplast-derived calluses onto M-17.
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Development of embryos was accomplished in agitated liquid Heller medium with 0.15 M gibberellic acid and germination on solid Heller medium without growth regulators. The total time for plantlet (4-leaves stage) recovery, following protoplast isolation, was 13 to 15 weeks. After acclimatization all protoplast-derived plants of Cichorium 474 were phenotypically normal and fertile. |
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Keywords: | chicory mesophyll protoplast regeneration |
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