Abstract
Cultivation of flax hypocotyl segments on MS medium supplemented with auxin (2,4-d, NAA) and combination of auxin (NAA) and cytokinin (BAP, zeatin) resulted in production of callus on the cut ends of segments and prolonged cultivation in globular structures resembling early stages of somatic embryos. Embryo-like structures protruded on the surface directly from the subepidermal layers of hypocotyl segments. Despite these globular structures closely resembling somatic embryos, histological observations did not reveal their embryogenic character–organogenesis was the predominant developmental morphogenic pathway. Based on our experiments, as well as on critical revision of existing reports on flax somatic embryogenesis, we conclude, that there has not yet been convincing histological proof of somatic embyogenesis from flax hypocotyl segments.
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References
Basiran N, Armitage P, Scott RJ, Draper J (1987) Genetic transformation of flax (Linum usitatissimum L.) by Agrobacterium tumefaciens - regeneration of transformed shoots via a callus phase. Plant Cell Rep 6:396–399
Bonell ML, Lassaga SL (2002) Genetic analysis of the response of linseed (Linum usitatissimum L.) somatic tissue to in vitro cultivation. Euphytica 125:367–372
Bretagne B, Chupeau M-C, Chupeau Y, Fouilloux G (1994) Improved flax regeneration from hypocotyl explants using thidiazuron as a cytokinin source. Plant Cell Rep 14:120–124
Charbit E, Lagavre T, Lardet L, Bourgeois E, Ferriere N, Carron MP (2004) Identification of differentially expressed cDNA sequences and histological characterization of Hevea brasiliensis calli in relation to their embryogenic and regenerative capacities. Plant Cell Rep 22:539–548
Cunha ACG, Ferreira MF (1996) Somatic embryogenesis, organogenesis and callus growth kinetics of flax. Plant Cell Tissue Organ Cult 47:1–8
Cunha ACG, Ferreira MF (1997) Differences in free sterols content and composition associated with somatic embryogenesis, shoot organogenesis and calli growth of flax. Plant Sci 124:97–105
Cunha ACG, Ferreira MF (1999) Influence of medium parameters on somatic embryogenesis from hypocotyl explants of flax (Linum usitatissimum L.). Effect of carbon source, total inorganic nitrogen and balance between ionic forms and interaction between calcium and zeatin. J Plant Physiol 155:591–597
Cunha ACG, Ferreira MF (2003) Organic variations in free and esterified fatty acids during somatic embryogenesis of flax (Linum usitatissimum L.). Plant Sci 164:863–872
Dedičová B, Hricová A, Šamaj J, Obert B, Bobák M, Preťová A (2000) Shoot and embryo-like structures regenerated from cultured flax (Linum usitatissimum L.) hypocotyl segments. J Plant Physiol 157:327–334
Quiroz-Figueroa FR, Mendez-Zeel M, Sanchez-Teyer F, Rojas-Herrera R, Loyola-Vargas VM (2002) Differential gene expression in embryogeneic and non-embryogenic clusters from cell suspension cultures of Coffea arabica. J Plant Physiol 159:1267–1270
Gamborg OL, Shyluk JP (1976) Tissue culture, protoplasts, and morphogenesis in flax. Bot Gaz 137:301–306
Gairi A, Rashid A (2002) In vitro stimulation of shhot-buds on hypocotyl of Linum seedlings, by flooding and etherel treatment of cultures. Plant Sci 163:691–694
Haccius B (1978) Question of unicellular origin of non-zygotic embryos in callus cultures. Phytomorphology 28:74–81
Kaul V, Williams EG (1987) Multiple shoot induction in vitro from the hypocotyl of germinating embryos of flax (Linum usitatissimum L.). J Plant Physiol 131:441–448
Lacoux J, Klein D, Domon J-M, Burel C, Lamblin F, Alexandre F, Sihachakr D, Roger D, Balange A-P, David A, Morvan C, Laine E (2003) Antisense transgenesis of Linum utitatissimum with a pectin methylesterase cDNA. Plant Physiol Biochem 41:241–249
Ling HQ, Binding H (1987) Plant regeneration from protoplasts in Linum. Plant Breeding 98:312–317
Link GKK, Eggera V (1946) Mode, site and time of initiation of hypocotyledonary bud primordia in Linum utitatissimum L. Bot Gaz 107:441–454
Ma Y, Sawhney VK, Steeves TA (1992) Staining of paraffin-embedded plant material in safranin and fast green without prior removal of the paraffin. Can J Bot 71:996–999
McDougall GJ, Davidson D, Millam S (1992) Alterations in surface-associated peroxidases during callus development and shoot formation in explants of Linum usitatissimum. J Plant Physiol 140:195–200
McHughen A (1990) Flax (Linum usitatissimum L.): in vitro studies. In: Bajaj YPS (ed) Biotechnology in agriculture and forestry, vol. 10, legumes and oilseed crops I. Springer-Verlag, Berlin Heidelberg, pp 502–520
Millam S, Davidson D (1993) Evidence for an interactive response of flax (Linum usitatissimum) hypocotyl tissue cultures to auxin and carbohydrates. J Plant Physiol 141:353–356
Millam S, Davidson D, Powell W (1992) The use of flax (Linum usitatissimum L.) as a model system for studies on organogenesis in vitro: the effect of different carbohydrates. Plant Cell Tissue Organ Cult 28:163–166
Mlynárová L, Bauer M, Nap J-P, Pre'ová A (1994) High efficiency Agrobacterium-mediated gene transfer to flax. Plant Cell Rep 13:282–285
Mordhorst AP, Hartog MV, El Tamer MK, Laux T, de Vries SC (2002) Somatic embryogenesis from Arabidopsis shoot apical meristem mutants. Planta 214:829–836
Murashige T, Skoog F (1962) A revised medium for rapid growth and bioassays with tobacco tissue cultures. Physiol Plant 15:473–497
Mushara R, Rashid A (2001) Regeneration of shoot-buds on hypocotyl of Linum seedlings: a stress-related response. Plant Sci 161:19–25
Pret'ová A (1990) Flax (Linim usitatissimum L.): embryo culture studies. In: Bajaj YPS (ed) Biotechnology in agriculture and forestry, vol. 10--legumes and oilseed crops I. Springer-Verlag, Berlin Heidelberg New York, pp 513–537
Pret'ová A, Williams EG (1986) Direct somatic embryogenesis from immature zygotic embryos of flax (Linum usitatissimum L.). J Plant Physiol 126:155–161
Stirn S, Mordhorst AP, Fuchs S, Lörz H (1995) Molecular and biochemical markers for embryogenic potential and regenerative capacity of barley (Hordeum vulgare L.) cell cultures. Plant Sci 106:195–206
Tejavathi DH, Sita GL, Sunita AT (2000) Somatic embryogenesis in flax. Plant Cell Tissue Organ Cult 63:155–159
Wijayanto T, McHughen A (1999) Genetic transformation of Linum by particle bombardment. In Vitro Cell Dev -- Plant 35:456–465
Williams EG, Maheswaran G (1986) Somatic embryogenesis: factors influencing coordinated behavior of cells as an embryogenic group. Ann Bot 57:443–446
Acknowledgements
We thank Dr S. Millam (SCRI Dundee, U.K.) for critical reading of manuscript and language correction. This work was funded by a grants from the Slovak Grant Agency VEGA, proj. No. 2/2089/22 and No. 2/2011/22
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Salaj, J., Petrovská, B., Obert, B. et al. Histological study of embryo-like structures initiated from hypocotyl segments of flax (Linum usitatissimum L.). Plant Cell Rep 24, 590–595 (2005). https://doi.org/10.1007/s00299-005-0029-x
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DOI: https://doi.org/10.1007/s00299-005-0029-x