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The Role of Proteolysis in R-Gene Mediated Defence in Plants

Tör, M and Yemm, A and Holub, E (2003) The Role of Proteolysis in R-Gene Mediated Defence in Plants. Molecular Plant Pathology, 4 (4). pp. 287-296. ISSN Online: 1364-3703

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Abstract

Within the last 10 years, numerous R genes have been cloned from natural genetic variation in model as well as crop plants, and these have been classified according to their motifs. Some of the downstream signalling components have also been identified by artificial mutagenesis. Recently, cloning of three of these signalling genes (COI1, RAR1 and SGT1b) from Arabidopsis, barley and tobacco have helped uncover the physiological link between defence signalling and ubiquitin-mediated protein degradation. The physical association of COI1 and SGT1b with the components of ubiquitin–ligase complexes has been shown. In addition, post-transcriptional silencing of some of the subunits of the ubiquitin-ligase complex has led to a loss of resistance, indicating that protein degradation may also act as a regulatory mechanism in plant defence. Over the next few years, we should expect to see more examples of the interplay between the defence response and protein degradation in plants.

Item Type: Article
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Uncontrolled Keywords: proteolysis, R-gene mediated defence, plant pathology
Subjects: Q Science > QK Botany
Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Q Science > QR Microbiology
Divisions: Academic Departments > Institute of Science and the Environment
Research Centres > National Pollen and Aerobiology Research Unit
Depositing User: Janet Davidson
Date Deposited: 19 Jan 2011 19:51
Last Modified: 19 Jan 2011 19:51
URI: https://eprints.worc.ac.uk/id/eprint/1169

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