Abstract
Protoplasts from Olea europaea L. have been compared in terms of their yield, viability, cell division and callus differentiation. Viable protoplasts were isolated from in vitro cultured leaves and cotyledons by an overnight incubation in an enzyme solution containing 1–1.5% driselase and 0.5M sucrose. This method allowed high yield of purified protoplasts, which floated and formed a dark green band at the meniscus, after centrifugation. Purified protoplasts were diluted to 3×104 protoplasts·ml−1 in culture medium. After cell wall regeneration, protoplasts gradually increased their volumes under appropriate conditions. The first divisions occurred during the second week in culture. Division efficiency ranged from 5.2 to 9.8% after 20 days in culture. Two weeks later visible microcolonies developed only from cotyledon protoplasts. After 6 weeks in culture, the microcalli were transferred to a solidified culture medium with 0.6% agarose, which induced active callus growth.
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Abbreviations
- OM:
-
olive proliferation medium, Rugini 1984
- Omg:
-
OM for the germination of olive embryos
- OMr=OM:
-
for root induction
- OMp=OM:
-
for protoplasts
- OMc=OM:
-
for callus
- BN:
-
Bourgin and Nitsch medium 1967
- IBA:
-
indol-3-butyric acid
- NAA:
-
naphthalene acetic acid
- 2,4-D:
-
dichlorophenoxyacetic acid.
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Communicated by A. M. Boudet
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Cañas, L.A., Wyssmann, A.M. & Benbadis, M.C. Isolation, culture and division of olive (Olea europaea L.) protoplasts. Plant Cell Reports 6, 369–371 (1987). https://doi.org/10.1007/BF00269563
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DOI: https://doi.org/10.1007/BF00269563