Biologia plantarum 49:333-339, 2005 | DOI: 10.1007/s10535-005-0003-z

Somatic embryogenesis in Pinus nigra: embryogenic tissue initiation, maturation and regeneration ability of established cell lines

T. Salajova1,*, J. Salaj1
1 Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra 1, Slovak Republic

The effect of plant growth regulators (PGR), 6-benzyladenine (BA), 2,4-dichlorophenoxyacetic acid (2,4-D), α-naphthaleneacetic acid (NAA) and sugars (sucrose, maltose, glucose, fructose) on the initiation of somatic embryogenesis of Pinus nigra Arn. was investigated. Megagametophytes containing immature zygotic embryos have been used as explants. The experiments were done in the years 2000 and 2001. Higher initiation frequencies were obtained in 2001 when the zygotic embryos showed uniformity, being in the precotyledonary stage of development. Embryogenic tissue initiation occurred on all the media tested, including PGR-free medium. Relatively high initiation frequencies were obtained on media containing either NAA (9.09 %) or 2,4-D (7.14 %) alone. Somatic embryos were present as bipolar structures and showed differences in morphological features among cell lines. Plantlet regeneration occurred in cell lines containing bipolar somatic embryos composed of compact meristematic embryo "head" and suspensor organized into bundles.

Keywords: pine; plant growth regulators; saccharides
Subjects: abscisic acid (ABA); auxins; cytokinins; embryo development, somatic; fructose, somatic embryogenesis; germination; glucose, somatic embryogenesis; in vitro culture, from cotyledon; in vitro culture, somatic embryogenesis; maltose, somatic embryogenesis; nutrient medium DCR (Gupta and Durzan); pine, somatic embryogenesis; Pinus nigra; saccharides; sugars, somatic embryogenesis; zygotic embryos

Received: November 19, 2003; Accepted: November 4, 2004; Published: September 1, 2005Show citation

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Salajova, T., & Salaj, J. (2005). Somatic embryogenesis in Pinus nigra: embryogenic tissue initiation, maturation and regeneration ability of established cell lines. Biologia plantarum, 49(3), 333-339. doi: 10.1007/s10535-005-0003-z.
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