Title: Trehalose-6-phosphate synthase as an intrinsic selection marker for plant transformation
Authors: Leyman, Barbara ×
Avonce, Nelson
Ramon, Matthew
Van Dijck, Patrick
Iturriaga, Gabriel
Thevelein, Johan #
Issue Date: Feb-2006
Publisher: Elsevier BV
Series Title: Journal of Biotechnology vol:121 issue:3 pages:309-317
Abstract: Insertion of foreign DNA into plant genomes occurs randomly and with low frequency. Hence, a selectable marker is generally required to identify transgenic plants. Until now, all selection systems have been based on the use of non-plant genes, derived from microorganisms and usually conferring antibiotic or herbicide resistance. The use of microorganism-derived genes however has raised biosafety concerns.We have developed a novel selection system based on enhancing the expression of a plant-intrinsic gene and the use of a harmless selection agent. Selection takes advantage of the reduced glucose sensitivity of seedlings with enhanced expression of AtTPS1, a gene encoding trehalose-6-P synthase. As a result, transformants can be identified as developing green seedlings amongst the background of small, pale non-transformed plantlets on high glucose medium. In addition, vegetative regeneration of tobacco leaf explants is very sensitive to high external glucose. Overexpression of AtTPS1 in tobacco allows selecting glucose insensitive transgenic shoots.
ISSN: 0168-1656
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory for Molecular Cell Biology (-)
Molecular Physiology of Plants and Micro-organisms Section - miscellaneous
Molecular Microbiology and Biotechnology Section - miscellaneous
× corresponding author
# (joint) last author

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