Abstract
This chapter describes an efficient protocol for large-scale micropropagation of date palm. Somatic embryo-derived plants are regenerated from highly proliferating suspension cultures. Friable embryogenic callus is initiated from juvenile leaves using slightly modified Murashige and Skoog (MS) medium supplemented with 0.1 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D). Suspension cultures consisting of proembryonic masses are established from highly competent callus for somatic embryogenesis using half-strength MS medium enriched with 0.1 mg/L 2,4-D and 300 mg/L activated charcoal. The productivity of cultures increased 20-fold when embryogenic cell suspensions were used instead of standard protocols on solidified media. The overall production of somatic embryos mostly exceeds 10,000 units per liter per month. Partial desiccation of mature somatic embryos, corresponding to a decrease in water content from 90 down to 75%, significantly improved germination rates.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Fki L, Masmoudi R, Kriaa W, Mahjoub A, Sghaier B, Mzid R et al (2011) Date palm micropropagation via somatic embryogenesis. In: Jain SM, Al-Khayri JM, Johnson DV (eds) Date palm biotechnology. Springer, The Netherlands, pp 47–68
Fki L, Bouaziz N, Kriaa W, Benjemaa-Masmoudi R, Gargouri-Bouzid R, Rival A, Drira N (2011) Multiple bud cultures of ‘Barhee’ date palm (Phoenix dactylifera) and physiological status of regenerated plants. J Plant Physiol 168:1694–1700
Al-Khayri JM (2013) Factors affecting somatic embryogenesis in date palm (Phoenix dactylifera L.) In: Aslam J, Srivastava PS, Sharma MP (eds) Somatic embryogenesis and genetic transformation in plants. Narosa Publishing House, New Delhi, pp 15–38
Fki L, Masmoudi R, Drira N, Rival A (2003) An optimised protocol for plant regeneration from embryogenic suspension cultures of date palm (Phoenix dactylifera L.) cv. Deglet nour. Plant Cell Rep 21:517–524
Drira N, Benbadis A (1985) Multiplication végétative du palmier dattier (Phoenix dactylifera L.) par réversion, en culture in vitro, d’ébauches florales de pieds femelles adultes. J Plant Physiol 119:227–235
Sharma DR, Deepak S, Chowdhury JB (1986) Regeneration of plantlets from somatic tissues of date palm (Phoenix dactylifera L). Indian J Exp Biol 24:763–766
Naik PM, Al-Khayri JM (2016) Somatic embryogenesis of date palm (Phoenix dactylifera L.) through cell suspension culture. In: Jain SM (ed) Protocols for in vitro cultures and secondary metabolite analysis of aromatic and medicinal plants, Methods in molecular biology, 2nd edn. Springer, New York, pp 357–366
Boufis N, Khelifi-Slaoui M, Djillali Z, Zaoui D, Morsli A, Bernards MA et al (2014) Effects of growth regulators and types of culture media on somatic embryogenesis in date palm (Phoenix dactylifera L. cv. Degla Beida). Sci Hort 172:135–142
Murashige T, Skoog F (1962) A revised medium for rapid growth and bioassays with tobacco tissue culture. Physiol Plant 15:473–479
Zaid A, Hughes H (1995) Water loss and polyethylene glycol-mediated acclimatization of in vitro grown Seedlings of 5 cultivars of date palm (Phoenix dactylifera L.) plantlets. Plant Cell Rep 14:385–388
Brainerd KE, Fuchigami LH (1982) Stomatal functioning of in vitro and greenhouse apple leaves in darkness, manitol, ABA and CO2. J Exp Bot 33:388–392
Zaid A, Hughes H (1995) In vitro acclimatization of date palm (Phoenix dactylifera L.) plantlets: a quantitative comparison of epicuticular leaf wax as a function of polyethylene glycol treatment. Plant Cell Rep 15:111–114
Fki L, Bouaziz N, Sahnoun N, Swennen R, Drira N, Panis B (2011) Palm cryobanking. CryoLetters 32(6):451–462
Reed BM, Tanprasert P (1995) Detection and control of bacterial contaminants of plant tissus culture. A review of recent literature. Plant Tiss Cult Biotechnol 1(3):137–142
Salma M, Fki L, Engelmann-Sylvestre I, Niino T, Engelmann F (2014) Comparison of droplet-vitrification and D-cryoplate for cryopreservation of date palm (Phoenix dactylifera L.) polyembryonic masses. Sci Hort 179:91–97
Acknowledgments
This work was supported financially by the Ministry of Higher Education and Scientific Research in Tunisia; the International Atomic Energy Agency (IAEA); the Arab League Educational, Cultural and Scientific Organization (ALECSO); The European Cooperation in Science and Technology (COST); the Swiss National Science Foundation (SNSF); and the Technical Centre of Dates in Tunisia (TCDT).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 Springer Science+Business Media LLC
About this protocol
Cite this protocol
Fki, L. et al. (2017). Indirect Somatic Embryogenesis of Date Palm Using Juvenile Leaf Explants and Low 2,4-D Concentration. In: Al-Khayri, J., Jain, S., Johnson, D. (eds) Date Palm Biotechnology Protocols Volume I. Methods in Molecular Biology, vol 1637. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-7156-5_9
Download citation
DOI: https://doi.org/10.1007/978-1-4939-7156-5_9
Published:
Publisher Name: Humana Press, New York, NY
Print ISBN: 978-1-4939-7155-8
Online ISBN: 978-1-4939-7156-5
eBook Packages: Springer Protocols