Abstract
This study investigated the delivery of a SV40 promoter driving lacZ gene into cells of Kappaphycus alvarezii using particle bombardment. Thallus pieces 0.5–0.8 mm in diameter and 1 cm in length were prepared as gene recipients. Bombardment parameters of 450 psi (rupture pressures) × 6 cm (particle travel distances), 650 psi × 6 cm, 1,100 psi × 6 cm and 1,100 psi × 9 cm were used. A significant increase in transformation efficiency from about 33% under the rupture pressure of 450 psi to 87% at 650 psi was observed in transformed thalli. Most of the positive cells appeared in epidermal cells bombarded at 450 psi, whereas positive signals were seen in both epidermal and medullary cells at 650 psi. No positive transient expression was detected at a bombardment of 1,100 psi, or in negative or blank controls. For the conditions tested, the best parameter was obtained at 650 psi at a distance of 6 cm. Thus, the strategy of taking vegetative thalli as recipients, using particle bombardment, and combining this with micro-propagation, together with developing an in vivo selectable marker, is a viable way to produce stable transformants, to eliminate chimeric expression, and to achieve transgenic breeding in K. alvarezii.
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Abbreviations
- GUS:
-
β-glucuronidase gene
- lacZ :
-
β-galactosidase gene
- CaMV:
-
Cauliflower mosaic virus
- SV40:
-
Simian virus 40
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Acknowledgments
This work was funded by Special Project for Marine Public Welfare Industry (200705010), National High Technology Research and Development Program of China (2009AA10Z106, 2006AA100311, 20060110A402) and the Innovative Key Project of the Chinese Academy of Sciences (KZCX2-YW-209, KSCX2-YW-G-002).
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Wang, J., Jiang, P., Cui, Y. et al. Genetic transformation in Kappaphycus alvarezii using micro-particle bombardment: a potential strategy for germplasm improvement. Aquacult Int 18, 1027–1034 (2010). https://doi.org/10.1007/s10499-010-9320-0
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DOI: https://doi.org/10.1007/s10499-010-9320-0