By G. A. Beattie, S. E. Lindow (auth.), Jeffery L. Dangl (eds.)
The final decade has obvious an explosion in our realizing of ways bacterial pathogens trick, cajole, usurp and parasitize their a variety of hosts. This renaissance is because of the convergence of molecular and mobile suggestions with the facility of microbial genetics. the aim of this quantity is to introduce contemporary advances in figuring out chosen platforms selected from either plant and animal hosts of bacterial pathogens. This a little nonobvious number of issues was once spurred via the hot findings, unique by means of numerous conributors to this quantity, of universal platforms used to secrete virulence components from pathogens of either crops and animals. those serendipitous findings underscored the significance of uncomplicated study methods to parallel difficulties in biology. extra importantly, they introduced jointly investigators who won't have in a different way develop into conversant with each one other's experimental platforms. I, for one, locate the types of synergism mirrored in a quantity of this type to be probably the most friendly points of technology and wish that the reader, no matter if a newcomer to the sphere or knowledgeable, can discover a new slant to previous difficulties within the reports contained h,E:lre. It used to be, even though, essential to restrict quantity size, and this has pressured the exclusion of a couple of interesting bacterial pathosystems.
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Extra resources for Bacterial Pathogenesis of Plants and Animals: Molecular and Cellular Mechanisms
Savastanoi and their laa- mutants on olive leaves. Proceedings of the 2nd working group on Pseudomonas syringae pathovars. Hellenic Phytopathological Society, Athens, Greece, pp 20-22 Vidaver AK, Mathys ML, Thomas ME, Schuster ML (1972) Bacteriocins of the phytopathogens Pseudomonas syringae, P. glycinea, and P. phaseolicola. Can J Microbiol 18: 705-713 Wanner LA, Mittal S, Davis KR (1993) Response of Arabidopsis thaliana to a Pseudomonas syringae pv. glycinea avirulence gene. Proceedings on molecular and genetic plant-microbe interactions, New Brunswick, New Jersey (abstract) Weibull J, Ronquist F, Brishammar S (1990) Free amino acid composition of leaf exudates and phloem sap: a comparative study in oats and barley.
Daniels, unpublished). 6 Additional Pathogenicity Genes A number of other pathogenicity genes of pathovars of Xanthomonas campestris have been identified by mutagenesis and the genes characterised. OSBOURN et al. (1990a) have described a gene in Xc. campestris in which mutation causes a loss of pathogenicity although extracellular enzymes and EPS remain at wild-type levels. Numbers of recoverable mutant bacteria drop by about tenfold within 24 h of introduction into the plant and then increase to a plateau level which is less than that attained by the wild type.
J. DANIELS, in preparation). c. campestris contains a gene (clp) encoding a DNA-binding protein similar to the catabolite activation protein (CAP) of E. coli (DE CRECy-LAGARD et al. 1990). CAP is a .. broad spectrum" regulator ota large number of genes, and mutants are unable to use certain carbon sources for growth. c. campestris, in contrast, was unaffected in its ability to utilise all carbon sources tested (unpublished data) and was not responsive to cyclic nucleotides. Xanthan production was reduced in the clp mutant, and the residual polysaccharide had different viscosity properties and altered acetyl and pyruvyl content compared with the product of wild-type bacteria.
Bacterial Pathogenesis of Plants and Animals: Molecular and Cellular Mechanisms by G. A. Beattie, S. E. Lindow (auth.), Jeffery L. Dangl (eds.)