Host-Pathogen Population Cycles in Forest Insects? Lessons from Simple Models Reconsidered

Oikos ◽  
1993 ◽  
Vol 67 (3) ◽  
pp. 529 ◽  
Author(s):  
Roger G. Bowers ◽  
Michael Begon ◽  
David E. Hodgkinson
Keyword(s):  
Population Cycles ◽  
Pathogen Population ◽  
Forest Insects ◽  
Host Pathogen ◽  
Simple Models

scholarly journals Does Host Self‐Regulation Increase the Likelihood of Insect‐Pathogen Population Cycles?

1999 ◽  
Vol 153 (2) ◽  
pp. 228-235 ◽  
Author(s):  
M. B. Bonsall ◽  
H. C. J. Godfray ◽  
C. J. Briggs ◽  
M. P. Hassell
Keyword(s):  
Self Regulation ◽  
Population Cycles ◽  
Pathogen Population ◽  
Insect Pathogen

A perspective on clonal phenotypic (antigenic) variation in protozoan parasites

Parasitology ◽  
2002 ◽  
Vol 125 (7) ◽  
pp. S17-S23 ◽  
Author(s):  
C. M. R. TURNER
Keyword(s):  
Population Growth ◽  
Antigenic Variation ◽  
Sensu Stricto ◽  
Pathogen Transmission ◽  
Protozoan Parasites ◽  
Pathogen Population ◽  
Functional Perspective ◽  
Immune Mediated ◽  
Host Pathogen ◽  
Functional Immunity

Intra-clonal phenotypic (antigenic) variation is used by many pathogens to evade the consequences of immune-mediated killing by mammalian hosts. In this substantially theoretical article, I emphasise that antigenic variation (sensu stricto) involves no change in genotype; its importance as a mechanism for promoting pathogen transmission and its polyphyletic origin. From a functional perspective, antigenic variation is constrained by the requirement to meet five conditions. These are: capability to express several antigens against which functional immunity predominates; capability to interact with the environment; mutually exclusive expression of variable antigens in each cell within an infection; mutually exclusive expression in the within-host pathogen population and the capability for population growth within a host. Meeting these conditions leads to chronicity of infection and high rates of hierarchical and reversible switching of expression between variable antigens. The organisation of hierarchical expression is discussed in some detail.

Host-Pathogen Population Dynamics, Basic Reproductive Rates and Threshold Densities

Oikos ◽  
1998 ◽  
Vol 81 (2) ◽  
pp. 299 ◽  
Author(s):  
Robert J. Knell ◽  
Michael Begon ◽  
David J. Thompson
Keyword(s):  
Population Dynamics ◽  
Pathogen Population ◽  
Host Pathogen ◽  
Reproductive Rates

scholarly journals Does Host Self-Regulation Increase the Likelihood of Insect-Pathogen Population Cycles?

1999 ◽  
Vol 153 (2) ◽  
pp. 228
Author(s):  
Bonsall ◽  
Godfray ◽  
Briggs ◽  
Hassell
Keyword(s):  
Self Regulation ◽  
Population Cycles ◽  
Pathogen Population ◽  
Insect Pathogen

Pathogenic specialisation in Uromyces viciae-fabae in Australia and rust resistance in faba bean

Plant Disease ◽  
2020 ◽  
Author(s):  
Usman Ijaz ◽  
Kedar Adhikari ◽  
Rohan Benjamin Essex Kimber ◽  
Richard Trethowan ◽  
Harbans Bariana ◽  
...  
Keyword(s):  
Faba Bean ◽  
Rust Resistance ◽  
Optimal Solution ◽  
Resistance Breeding ◽  
Pathogen Population ◽  
Host Pathogen Interactions ◽  
Single Spore ◽  
Nomenclature System ◽  
Differential Set ◽  
Host Pathogen

The pathogen Uromyces viciae-fabae causes rust (a fungal disease) on faba bean (Vicia faba). This disease limits faba bean production in Africa, Asia, Europe and Australia. The development of resistant cultivars to U. viciae-fabae is the optimal solution for sustainable disease management. However, unknown virulence in Australian U. viciae-fabae populations has confounded resistance breeding. This study examined differences in virulence amongst Australian U. viciae-fabae isolates collected from various locations and established a differential set of faba bean genotypes. Ten rust isolates were collected from the major faba bean growing regions in Australia and single spore cultures produced. These cultures were subsequently used for assessing virulence on 40 diverse faba bean genotypes. Based on the host-pathogen interactions, 12 putative host genotypes were identified as a differential set. A nomenclature system was subsequently developed using the binary pathotype naming system. Based upon host-pathogen interactions, nine virulence patterns were detected, and the isolates were named using the new nomenclature. We report characterisation and naming of U. viciae-fabae pathotypes using differential genotypes in Australia. This differential set will help identify and track the evolution of new virulence in pathogen population and will assist pyramiding of rust resistance genes.

Sign in / Sign up

Export Citation Format

Share Document