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Improved plastid transformation efficiency in Scoparia dulcis L.
J Plant Biotechnol 2019;46:323-330
Published online December 31, 2019
© 2019 The Korean Society for Plant Biotechnology.

Srinivas Kota · Qiang Hao · Muralikrishna Narra · Vaishnavi Anumula · A.V Rao · Zanmin Hu · Sadanandam Abbagani

Department of Biotechnology, Kakatiya University, Warangal, India- 506009
Correspondence to: e-mail:
Received July 1, 2019; Revised September 26, 2019; Accepted September 26, 2019.
cc This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The high expression level of industrial and metabolically important proteins in plants can be achieved by plastid transformation. The CaIA vector, a Capsicum-specific vector harboring aadA (spectinomycin resistance), is a selectable marker controlled by the PsbA promoter, and the terminator is flanked by the trnA and trnI regions of the inverted repeat (IR) region of the plastid. The CaIA vector can introduce foreign genes into the IR region of the plastid genome. The biolistic method was used for chloroplast transformation in Scoparia dulcis with leaf explants followed by antibiotic selection on regeneration medium. Transplastomes were successfully screened, and the transformation efficiency of 3 transgenic lines from 25 bombarded leaf explants was determined. Transplastomic lines were evaluated by PCR and Southern blotting for the confirmation of aadA insertion and its integration into the chloroplast genome. Seeds collected from transplastomes were analyzed on spectinomycin medium with wild types to determine genetic stability. The increased chloroplast transformation efficiency (3 transplastomic lines from 25 bombarded explants) would be useful for expressing therapeutically and industrially important genes in Scoparia dulcis L.
Keywords : Scoparia dulcis L., Heterologous vectors, CaIA plastid vector, Inverted repeat region, Transplastomic lines

December 2019, 46 (4)
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