Characterization of cauliflower mosaic virus (CaMV) resistance in virus-resistant ecotypes of Arabidopsis

Molecular Plant-microbe Interactions : MPMI
A CallawayS H Howell

Abstract

Two Arabidopsis ecotypes are resistant to systemic infection by cauliflower mosaic virus (CaMV), a plant para-retrovirus. Arabidopsis ecotype Enkheim-2 (En-2) is highly resistant to CaMV infection while Bla-14 is more weakly resistant. CaMV resistance in En-2 can be largely attributed to the action of a single semidominant gene called cauliflower mosaic virus resistance1 (CAR1), located at a locus on chromosome 1. Resistance in Bla-14 is tightly linked to CAR1 and may be due to a weak allele at the same locus or another gene in a gene cluster. A quantitative polymerase chain reaction assay in conjunction with replication- and movement-incompetent viral mutants was used to determine whether virus replication or movement is affected in the resistant ecotypes. The pattern of accumulation of the wild-type virus in the resistant ecotype, En-2, was similar to that of a movement-incompetent CaMV mutant, suggesting that CAR1 interferes with or fails to support CaMV movement. CaMV-inoculated En-2 plants do not show visible signs of a hypersensitive response. However, indicators of an induced defense response do appear in CaMV-infected En-2 plants, such as the activation of pathogenesis-related protein gene expression and the production ...Continue Reading

Citations

Sep 24, 2008·Plant Molecular Biology·Sandeep Kumar, William F Thompson
Nov 1, 2002·Molecular Plant Pathology·Muriel HaasMario Keller
Jul 29, 1998·The Plant Journal : for Cell and Molecular Biology·M YoshiiS Naito
Jul 12, 2008·Molecular Plant-microbe Interactions : MPMI·Michael M GoodinSteven A Lommel
Nov 7, 1999·Molecular Plant-microbe Interactions : MPMI·A Martín MartínF Ponz
May 5, 2000·Molecular Plant-microbe Interactions : MPMI·A S CallawayS H Howell
Nov 20, 2002·Molecular Plant-microbe Interactions : MPMI·Yongzhong Li, Scott M Leisner
Jul 10, 2004·Molecular Plant-microbe Interactions : MPMI·Yoshihiro NarusakaKazuo Shinozaki
Jan 1, 1997·Annual Review of Genetics·J GlazebrookF M Ausubel
Jan 5, 2000·Proceedings of the National Academy of Sciences of the United States of America·S T ChisholmJ C Carrington
Jan 16, 2007·Phytochemistry·Erich Glawischnig
Jan 1, 2015·Molecular Plant-microbe Interactions : MPMI·Michael M GoodinSteven A Lommel

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