Abstract
Tomato plants stably expressing the tetR gene were transformed with the beta-glucuronidase (GUS) gene and an le20 antisense construct both under the control of the Triple-Op promoter. Induction of GUS mRNA and le20 antisense RNA in leaves was demonstrated in response to tetracycline. le20 antisense induction was also demonstrated in fruit. Activation of the Triple-Op promoter reduced expression of the downstream hygromycin phosphotransferase II (hptII) gene. Transcriptional interference was therefore observed between tandem genes within T-DNA. Such interference may occur in other T-DNAs, but would not be readily observed without an upstream promoter with controllable activity.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Anti-Bacterial Agents / pharmacology
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DNA, Bacterial / genetics*
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Gene Expression Regulation, Plant*
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Glucuronidase / genetics
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Phosphotransferases (Alcohol Group Acceptor) / biosynthesis
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Phosphotransferases (Alcohol Group Acceptor) / genetics
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Promoter Regions, Genetic*
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Repressor Proteins / genetics
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Solanum lycopersicum / drug effects
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Solanum lycopersicum / genetics
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Tetracycline / pharmacology
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Transcription, Genetic*
Substances
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Anti-Bacterial Agents
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DNA, Bacterial
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Repressor Proteins
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T-DNA
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tetracycline resistance-encoding transposon repressor protein
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Phosphotransferases (Alcohol Group Acceptor)
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hygromycin-B kinase
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Glucuronidase
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Tetracycline