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Chapter 15 : Genomic Analysis of Plant Pathogenic Bacteria

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Abstract:

This chapter provides an overview of how genome sequence data are changing our understanding of the mechanisms and evolution of plant pathogenesis, and discusses the opportunities and challenges genome data present for future research. The majority of plant pathogenic bacteria contain large numbers of genomic islands, and it is clear that in many cases they play an essential role in disease. Genes encoding the phytotoxins coronatine and syringomycin reside on PIs, as do their recently discovered counterparts in subsp. SCR1043. Pathogenicity and virulence factors have received the greatest focus in the genomic analysis of plant pathogens. Protein secretion systems are essential for pathogenesis in most plant pathogenic bacteria and have been extensively studied, particularly in proteobacterial pathogens. The phytohormones indole-3-acetic acid (IAA or auxin) is produced by many phytopathogenic bacteria. IAA production has been shown to contribute to in planta and epiphytic growth, virulence, and the regulation of syringomycin in . Genome analyses of plant pathogens have highlighted three aspects of physiological adaptation to life on plants: specialization, innovation, and flexibility. A largely uninvestigated element in understanding the content and function of plant pathogen genomes, particularly the genomes of facultative plant pathogens, rests on understanding what plant pathogenic bacteria do when not causing disease.

Citation: Preston G, Guttman D, Toth I. 2007. Genomic Analysis of Plant Pathogenic Bacteria, p 392-418. In Pallen M, Nelson K, Preston G (ed), Bacterial Pathogenomics. ASM Press, Washington, DC. doi: 10.1128/9781555815530.ch15

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Plant Pathogenic Bacteria
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Type III Secretion System
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Type II Secretion System
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Type I Secretion System
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Type II Secretion System
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Type I Secretion System
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FIGURE 1

Pathogenicity and virulence factors produced by proteobacterial plant pathogens.

Citation: Preston G, Guttman D, Toth I. 2007. Genomic Analysis of Plant Pathogenic Bacteria, p 392-418. In Pallen M, Nelson K, Preston G (ed), Bacterial Pathogenomics. ASM Press, Washington, DC. doi: 10.1128/9781555815530.ch15
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Image of FIGURE 2
FIGURE 2

Main routes of bacterial penetration and infection.

Citation: Preston G, Guttman D, Toth I. 2007. Genomic Analysis of Plant Pathogenic Bacteria, p 392-418. In Pallen M, Nelson K, Preston G (ed), Bacterial Pathogenomics. ASM Press, Washington, DC. doi: 10.1128/9781555815530.ch15
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Tables

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TABLE 1

Completed genome sequences of plant pathogenic bacteria

Citation: Preston G, Guttman D, Toth I. 2007. Genomic Analysis of Plant Pathogenic Bacteria, p 392-418. In Pallen M, Nelson K, Preston G (ed), Bacterial Pathogenomics. ASM Press, Washington, DC. doi: 10.1128/9781555815530.ch15
Generic image for table
TABLE 2

Regulatory domains of representative plant pathogens

Citation: Preston G, Guttman D, Toth I. 2007. Genomic Analysis of Plant Pathogenic Bacteria, p 392-418. In Pallen M, Nelson K, Preston G (ed), Bacterial Pathogenomics. ASM Press, Washington, DC. doi: 10.1128/9781555815530.ch15

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