Abstract
A methodology to regenerate whole plants of Pinus radiata from apical meristems of 3- and 7-year-old trees was developed. Meristematic domes with two or three leaf primordia were excised from surface-sterilized branch tips of field-grown plants and cultured in LP medium with half strength macronutrients (1/2 LP) and full strength micronutrients. The early growth of meristems required approximately 12 weeks, including a recovery stage during the first 2 weeks. After 8 weeks, some meristems developed abnormal phenotypes and died during the subsequent stages of development. However, healthy meristems elongated and formed shoots when they were transferred to LP medium supplemented with MS vitamins, 30 mg l−1 casein hydrolysate, and 0.4 g l−1 agar plus 2.85 g l−1 Gelrite. Meristems that developed vigorous shoots were used for rooting experiments when they were 2 cm in length. Whole plants were obtained after 5 days of root induction in water-agar medium containing 8.2 μM IBA and 5.4 μM NAA and 1 month culture in LP medium with 10 g l−1 sucrose. Plants regenerated from meristems were further propagated by rooting of cuttings. Of the rooted cuttings, 10% were morphologically juvenile.
Similar content being viewed by others
References
Bon M-C & Monteuuis O (1991) Rejuvenation of a 100-year-old Sequoiadendron giganteum through in vitro meristem culture II. Biochemical arguments. Physiol. Plant. 81: 116-120
Franclet A, Boulay M, Bekkaqui F, Fouret Y, Verschoore-Martouzet B & Walker N (1987) Rejuvenation. In: Bonga JM & Durzan DJ (eds) Cell and Tissue Culture in Forestry Vol. 1 (pp. 233-247). Martinus Nijhoff, Dordrecht
Goldfarb B, Howe GM, Hackett W & Monteuuis O (1996) Survival and growth of eastern white pine shoot apical meristem in vitro. Plant Cell Tiss. Org. Cult. 46: 171-178
Horgan (1987) Pinus radiata. In: Bonga JM & Durzan DJ (eds) Cell and Tissue Culture in Forestry, Vol 1 (pp. 128-145). Martinus Nijhoff, Dordrecht
Monteuuis O & Dumas E (1992) Morphological features as in-dicators of maturity in acclimatized Pinus pinaster from different in vitro origins. Can. J. For. Res. 22: 1417-1421
Murashige T & Skoog F (1962) A revised medium for rapid growth and bio assay with tobacco tissue cultures. Physiol. Plant. 15: 473-497
Quoirin MP & Lepoivre P (1977) Etudes de milieux adaptes auz cultures in vitro de Prunus. Acta Hort. 78: 437-442
Reilly K & Washer J (1977)Vegetative propagation of radiata pine by tissue culture: plantlet formation from embryonic tissue. N. Z. J. For. Sci. 7: 199-206
Smith DR (1999) Successful rejuvenation of radiata pine Proceed-ings of the 25th Biennial Southern Forest Tree Improvement Conference (pp. 158-167). L.A. New Orleans, New Orleans
Stange C, Prehn D, Gebahuer M & Arce-Johnson P (1999) Optimi-zation of in vitro culture conditions for Pinus radiata embryos and histological characterization of regenerated shoots. Biol. Res. 32: 19-28
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Prehn, D., Serrano, C., Mercado, A. et al. Regeneration of whole plants from apical meristems of Pinus radiata . Plant Cell, Tissue and Organ Culture 73, 91–94 (2003). https://doi.org/10.1023/A:1022615212607
Issue Date:
DOI: https://doi.org/10.1023/A:1022615212607