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Transient gene expression in electroporated protoplasts of Eucalyptus citriodora Hook

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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.

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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

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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

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  • DOI: https://doi.org/10.1007/BF00040003

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