Abstract
Protoplasts isolated from cotyledons of Eucalyptus citriodora were electroporated using a rectangular pulse, with plasmid carrying the cat gene. The levels of transient expression and protoplast viability were influenced by the voltage and pulse duration. At a field strength of 800 V cm-1 (1000 μs), a protoplast viability of 57%, and 47% conversion of 14C-chloramphenicol to its acetylated forms, were obtained. Expression levels were improved by an increase in plasmid concentration (up to 60 μg ml-1), and also by the addition of carrier DNA. Gene expression was further enhanced by the addition of 40% (w/v) PEG, in the presence of the carrier DNA, to the protoplasts after electroporation.
Similar content being viewed by others
Abbreviations
- BAP:
-
6-benzylaminopurine
- CAT:
-
chloramphenicol acetyltransferase
- CPW 13M:
-
CPW salts medium with 13% (w/v) mannitol
- DC:
-
direct current
- FDA:
-
fluorescein diacetate
- f. wt:
-
fresh weight
- GUS:
-
β-glucuronidase
- K:
-
Kao (1977)
- MES:
-
2-N-morpholinoethane sulfonic acid
- MS:
-
Murashige & Skoog (1962)
- NAA:
-
α-naphthaleneacetic acid
- PVP-10:
-
polyvinylpyrrolidone (Av MW 10,000)
- TLC:
-
thin layer chromatography
References
Bekkaoui F, Pilon M, Laine E, Raju DDS, Crosby WL & Dunstan DI (1988) Transient gene expression in electroporated Picea glauca protoplasts. Plant Cell. Rep. 7: 481–484
Charest PJ & Klimaszewska K (1990) Transient expression of foreign chimeric genes in hybrid larch (Larix eurolepis) protoplasts. J. Cell Biochem. Sup. 14E: 277
Gilmour DM, Davey MR & Cocking EC (1989) Production of somatic hybrid tissues following chemical and electrical fusion of protoplasts from albino cell suspensions of Medicago sativa and M. borealis. Plant Cell Rep. 8: 29–32
Golds TJ, Davey MR, Rech EL & Power JB (1990) Methods of gene transfer and analysis in higher plants. In: Pollard JW & Walker JM (Eds) Methods in Molecular Biology, Vol 6 (pp 341–371). Ch 33 Plant Cell and Tissue Culture, Humana Press
Gorman CM, Moffat LF & Howard BH (1982) Recombinant genomes which express chloramphenicol acetyltransferase in mammalian cells. Mol. Cell Biol. 2: 1044–1051
Gupta PK, Dandekar AM & Durzan DJ (1988) Somatic pro-embryo formation and transient expression of a luciferase gene in Douglas fir and loblolly pine protoplasts. Plant Sci. 58: 85–92
Jefferson RA (1987) Assaying chimeric genes in plants: The GUS gene fusion system. Plant Mol. Biol. Rep. 5: 387–405
Joersbo M & Brunstedt J (1990) Direct gene transfer to plant protoplasts by electroporation by alternating, rectangular and exponentially decaying pulses. Plant Cell. Rep. 8: 701–705
Kao KN (1977) Chromosomal behaviour in somatic hybrids of soybean-Nicotiana glauca L. Mol. Gen. Genet. 150: 225–230
Krens FA, Molendijk L, Wullems GJ & Schlperoort RA (1982) In vitro transformation of plant protoplasts with Ti-plasmid DNA. Nature 296: 72–74
Murashige T & Skoog F (1962) A revised medium for rapid growth and bioassays with tobacco tissue cultures. Physiol. Plant. 15: 473–497
Pietrzak M, Shillito RD, Hohn T & Potrykus I (1986) Expression in plants of two bacterial antibiotic resistance genes after protoplast transformation with a new plant expression vector. Nucleic Acids Res. 14: 5857–5868
Power JB, Davey MR, McLellan & Wilson D (1989) Laboratory Manual: Plant Tissue Culture. Plant Genetic Manipulation Group, Dept. of Botany, University of Nottingham, UK
Sambrook J, Fritsch EF & Maniatis T (1989) Molecular Cloning. A Laboratory Manual. Second Edition, Vol 1: 33–41 Cold Spring Harbour Laboratory Press. USA
Santos AVP, d'Utra Vaz FB & Power JB (1990) Towards somatic hybridization in the Genus Eucalyptus. Abstracts VIIth International Congress on Plant Tissue and Cell Culture, Amsterdam: 208
Séguin A & Lalonde M (1988) Gene transfer by electroporation in Betulaceae protoplasts (Alnus incana). Plant Cell Rep. 7: 367–370
Shillito RD, Saul MW, Paszkowski J, Müller M & Potrykus I (1985) High efficiency direct gene transfer to plants. Bio/Technol. 3: 1099–1103
Tautorus TE, Bekkaoui F, Pilon M, Datla RSS, Crosby WL, Fowke LC & Dunstan DI (1989) Factors affecting transient gene expression in electroporated black spruce (Picea mariana) and jack pine (Pinus banksiana) protoplasts. Theor. Appl. Genet. 78: 531–536
Teullères C, Grima-Pettenati J, Curie C, Teissic J & Boudet AM (1991) Transient gene expression in protoplasts and intact cells of Eucalyptus gunnii after electrical or chemical treatment. Plant Cell Tiss. Org. Cult. 25: 125–132
Watts JW & King JM (1984) A simple method for large-scale electrofusion and culture of plant protoplasts. BioSci Rep. 4: 335–342
Wilson SM, Thorpe TA & Moloney MM (1989) PEG-mediated expression of GUS and CAT genes in protoplasts from embryogenic suspension cultures of Picea glauca. Plant Cell Rep. 7: 704–707
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Manders, G., dos Santos, A.V.P., d'Utra Vaz, F.B. et al. Transient gene expression in electroporated protoplasts of Eucalyptus citriodora Hook. Plant Cell Tiss Organ Cult 30, 69–75 (1992). https://doi.org/10.1007/BF00040003
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00040003