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Screening for Gene Regulation Mutants by Bioluminescence Imaging
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-------------------------------------------------------------------------------- https://stke.sciencemag.org/cgi/ ... trans;2002/140/pl10 Sci. STKE, 9 July 2002 Vol. 2002, Issue 140, p. pl10 [DOI: 10.1126/stke.2002.140.pl10] PROTOCOLS Screening for Gene Regulation Mutants by Bioluminescence Imaging Viswanathan Chinnusamy, Becky Stevenson, Byeong-ha Lee, and Jian-Kang Zhu* Department of Plant Sciences, University of Arizona, Tucson, AZ 85721, USA. Abstract: Because plants cannot move, they have evolved complex sensing and response systems to cope with the physical environment. Adverse environmental conditions, such as those causing abiotic stress, often cause significant losses in crop productivity and quality. Because of a paucity of well-defined visible phenotypes, conventional genetic screens have not been very successful in isolating abiotic stress signal transduction mutants of plants. Here, we describe a reporter gene-based strategy to screen for mutants affected in abiotic stress-regulated gene transcription. Our genetic screen uses the firefly luciferase reporter gene driven by the cold, drought, salt, and abscisic acid (ABA)-responsive RD29A promoter (RD29A::LUC). Arabidopsis plants transformed with the RD29A::LUC reporter emit bioluminescence in response to cold, drought, salt, or ABA treatment. After mutagenesis of these plants with ethyl methanesulfonate (EMS), mutants can be screened from the M2 population by monitoring the level of stress-inducible bioluminescence with a high-throughput, low-light imaging system. This protocol describes in detail the procedures for this luciferase reporter-based genetic screen for Arabidopsis mutants defective in abiotic stress signaling. |
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