Bacterial Speck Disease of Tomato: An Insight into Host-Bacteria Interaction


Presentation (Elaboration), 2008

11 Pages


Abstract or Introduction

Pseudomonas syringae pv. tomato (Pst) is a common pathogen of tomato which causes bacterial speck disease. This disease serves as a useful model for studying the interactions of microbial pathogens and plants. Most gram-negative bacteria, including Pst, have type III secretion system (TTSS). Encoded by hrp gene clusters, the TTSS is used to deliver effector proteins into the host cytosol. The hrp genes also control the expression of the avirulence genes (avr). One Avr protein, AvrPto, functions as ligand to elicit a hypersensitive response (HR) in the tomato plant after recognition by the protein encoded by the host resistance gene, Pto. The AvrPto-Pto interaction is the most widely studied systems. It has been discovered that Pto is linked with Fen, the gene responsible for susceptibility to an organophosphate insecticide, fenthion. Functioning of Pto requires another gene called Prf, which lies embedded in Pto. Though the system is well characterized, several aspects are still not understood. With the availability of completed genome sequence of Pst and the full sequence of tomato expected in the future, we may anticipate that our understanding of the mechanisms of this host-pathogen interaction to be improved.

Details

Title
Bacterial Speck Disease of Tomato: An Insight into Host-Bacteria Interaction
College
University of Minnesota - Twin Cities
Author
Year
2008
Pages
11
Catalog Number
V178581
ISBN (eBook)
9783656009481
ISBN (Book)
9783656010937
File size
1132 KB
Language
English
Keywords
bacterial, speck, disease, tomato, insight, host-bacteria, interaction
Quote paper
Pravin Gautam (Author), 2008, Bacterial Speck Disease of Tomato: An Insight into Host-Bacteria Interaction, Munich, GRIN Verlag, https://www.grin.com/document/178581

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