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Development of efficient miniprep transformation methods for Artemisia annua using Agrobacterium tumefaciens and Agrobacterium rhizogenes

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Kiani, Bushra Hafeez, Suberu, John O., Barker, Guy C. and Mirza, Bushra (2014) Development of efficient miniprep transformation methods for Artemisia annua using Agrobacterium tumefaciens and Agrobacterium rhizogenes. In Vitro Cellular & Developmental Biology - Plant, Volume 50 (Number 5). pp. 590-600. doi:10.1007/s11627-014-9607-3

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Official URL: http://dx.doi.org/10.1007/s11627-014-9607-3

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Abstract

Extensive studies have been carried out for the optimization of regeneration and transformation conditions for both Agrobacterium tumefaciens- and Agrobacterium rhizogenes-mediated transformation of the highly medicinal plant Artemisia annua. Most protocols describe laborious transformation procedures requiring no less than 3 mo to obtain transgenic plants. This study reports rapid and efficient protocols for A. tumefaciens- and A. rhizogenes-mediated transformation of A. annua, which were equally effective for transformation of Artemisia dubia. In both transformation procedures, stem explants responded best for maximal production of transformed plants and hairy roots. In the case of A. tumefaciens-mediated transformation, stem explants were pre-cultured for 2 d followed by infection with A. tumefaciens strain LBA4404 for 48 h. A. annua explants showed maximal transformation rate (43.5%) on half-strength Murashige and Skoog medium containing 40 mg/L kanamycin in only 20 d. The same method was tested using a related species A. dubia and resulted in a transformation rate of 41.3%, demonstrating that this protocol is efficient and genotype-independent. In the case of A. rhizogenes-mediated transformation for the production of hairy root cultures, in vitro-grown stem explants were infected with a single colony of A. rhizogenes strain LBA9402 by creating incisions at different places of the stem explants, which resulted in production of hairy roots in only 7 d. The method was tested in both A. annua and A. dubia, which resulted in transformation rates of 90 and 87.5%, respectively. Integration of the transgene and copy number was confirmed by PCR and Southern blot analyses, respectively. The miniprep transformation protocols developed for both A. tumefaciens- and A. rhizogenes-mediated transformation are simple, efficient, and potentially applicable to other species of Artemisia for transfer of pharmaceutically important genes.

Item Type: Journal Article
Divisions: Faculty of Science > Life Sciences (2010- )
Journal or Publication Title: In Vitro Cellular & Developmental Biology - Plant
Publisher: Springer
ISSN: 1054-5476
Official Date: October 2014
Dates:
DateEvent
October 2014Published
22 March 2014Available
26 February 2014Accepted
4 May 2014Submitted
Volume: Volume 50
Number: Number 5
Page Range: pp. 590-600
DOI: 10.1007/s11627-014-9607-3
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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