Abstract
Perennial ryegrass is widely used for overseeding dormant bermudagrass on golf courses and sports fields in Southeastern United States to provide green color and improved playability. Late spring and summer persistence of perennial ryegrass may decrease the quality of the bermudagrass turf and reduce its winter hardiness. To help solve this problem, we developed a strategy to activate a pro-herbicide within the transgenic perennial ryegrass plants and to cause self elimination of the plants. An E. coli argE gene was introduced into perennial ryegrass by the biolistic method, which resulted in four independently transformed green plants. The mRNA of argE gene was detected in three of the plants by RT-PCR. Perennial ryegrass plants expressing the argE transgene were selectively controlled upon application of a pro-herbicide, N-acetyl-l-phosphinothricin (or N-acetyl-PPT), since the N-acetylornithinase encoded by argE gene is able to convert N-acetyl-PPT to the herbicide phosphinothricin (PPT). The non-transgenic bermudagrass plants were unaffected by the treatment. This approach provides a means to selectively remove a group of transgenic plants without affecting other plants growing with them.
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Abbreviations
- hyg B:
-
hygromycin B
- PPT:
-
phosphinothricin
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Chen, X., Yang, W., Sivamani, E. et al. Selective elimination of perennial ryegrass by activation of a pro-herbicide through engineering E. coli argE gene. Mol Breeding 15, 339–347 (2005). https://doi.org/10.1007/s11032-004-7243-z
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DOI: https://doi.org/10.1007/s11032-004-7243-z