Journal
MOLECULAR BIOTECHNOLOGY
Volume 32, Issue 1, Pages 55-63Publisher
HUMANA PRESS INC
DOI: 10.1385/MB:32:1:055
Keywords
NITS; cell-permeable Cre recombinase; marker-free; transgenic rice plants; biosafety
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The removal of selected marker genes from transgenic plants is necessary to address biosafety concerns and to carry out further experiments with transgenic organisms. In the present study, the 12-amino-acid membrane translocation sequence (MTS) from the Kaposi fibroblast growth factor (FGF)-4 was used as a carrier to deliver enzymatically active Cre proteins into living plant cells, and to produce a site-specific DNA excision in transgenic rice plants. The process, which made cells permeable to Cre recombinase-mediated DNA recombination, circumvented the need to express Cre under spatiotemporal control and was proved to be a simple and efficient system to achieve marker-free transgenic plants. The ultimate aim of the present study is to develop commercial rice cultivars free from selected marker genes to hasten public acceptance of transgenic crops.
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