PMID: 11607497Oct 25, 1994Paper

Expression of the gene for a small GTP binding protein in transgenic tobacco elevates endogenous cytokinin levels, abnormally induces salicylic acid in response to wounding, and increases resistance to tobacco mosaic virus infection

Proceedings of the National Academy of Sciences of the United States of America
H SanoK Ishizuka

Abstract

Tobacco plants transformed with rgp1, a gene encoding a Ras-related small GTP binding protein, were previously shown to exhibit a distinct reduction in apical dominance with increased tillering. These abnormal pheno-types were later found to be associated with elevated levels of endogenous cytokinins (zeatin and zeatin riboside). Analysis of the expression of several genes known to be affected by cytokinins identified a clear increase in the mRNA levels of genes encoding acidic pathogenesis-related proteins in both transgenic plants and their progenies. This increase was directly attributable to elevated levels of the acidic pathogenesis-related protein inducers, salicylic acid (SA) and salicylic acid beta-glucoside, due to an abnormal and sensitive response of the transgenic plants to wounding. In contrast, mRNA levels of the gene for proteinase inhibitor II, which is normally induced by wounding, were generally suppressed in the same wounded plants, probably due to SA overproduction. The changes in SA and pathogenesis-related protein levels in the transgenic plants resulted in a distinct increase in their resistance to tobacco mosaic virus infection. In normal plants, the wound and pathogen-induced signal transduction pathway...Continue Reading

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Citations

Jan 1, 2002·The Arabidopsis Book·Robert A Creelman, Rao Mulpuri
Mar 6, 1999·Current Opinion in Plant Biology·D Scheel
Sep 21, 2000·Plant Science : an International Journal of Experimental Plant Biology·M K Srivastava, U N Dwivedi
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Jun 26, 2015·Journal of Experimental Botany·Muhammad NaseemThomas Dandekar
Apr 23, 2015·Plant Science : an International Journal of Experimental Plant Biology·Petra SpoustováHelena Synková
Aug 26, 2009·Plant Signaling & Behavior·Kwi-Mi Chung, Hiroshi Sano
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Apr 4, 2017·The Plant Journal : for Cell and Molecular Biology·Haina Zhang, Uwe Sonnewald
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Jun 24, 2017·Small GTPases·Claudio RiveroFlavio Antonio Blanco
Jun 29, 2004·Molecular Genetics and Genomics : MGG·K SchieneK Niehaus

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