An overview of plant epidemiology
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Transcript of An overview of plant epidemiology
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A Plant Epidemiology Overview
Mike Jeger & Marco Pautasso*,Imperial College London
30 Nov 2009* marpauta at gmail.com
1. Invasion biology of plant pathogens2. Networks in plant epidemiology
3. Climate change and plant pathogens4. Models of plant epidemics
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Photos: American Phytopathological Society, www.apsnet.org - Online Resources
Biodiversity of plant pathogens
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Source: British Society for Plant Pathology, www.bspp.org.uk/
BSPP Photo Competition
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Source: British Society for Plant Pathology, www.bspp.org.uk/
BSPP Photo Competition
(bis)
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Caroline Mohammed, Univ. of Tasmania
& Marie-Laure Desprez-Loustau, INRA, France
A sample of plant pathologists
Anna-Liisa Laine, Helsinki Univ.
Xiaoyun Lu,Cornell Univ.
Joan Webber, Forest Res., UK Jennifer Parke,
Oregon State Univ.
Adrienne Hardham, Canberra Univ.
Yvonne Willi, ETHZ, CH
Mary Olsen, Univ. of Arizona
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From Brown & Hovmøller (2002) Science
Examples of invasions of plant pathogens
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Map from Brown & Hovmøller(2002) Science
Dispersal of the wheat yellow rust pathogen, Puccinia striiformis f. sp. tritici, in China.
Photo by Yue Jin, US Dept. of Agriculture
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Network from Zaffarano et al. (2008) Molecular Ecology; Photo by Matthew Abang, ICARDA, Aleppo, Siria
Phylogeography of Rhynchosporium secalis
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From Desprez-Loustau et al. (2007) Trends in Ecology & Evolution
Invasive fungal pathogens are a subset of invasive fungal species
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From Vellinga et al. (2009) New Phytologist
Invasion biology of ectomycorrhizal species
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From Vacher et al. (2008a, b) PLoS One + Diversity & Distributions
Antagonistic plant/fungus network based on a national inventory of parasitic fungi
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step 1
step 2
step 3
step n
…
Simple model of disease spread in a directed network
pt probability of infection transmission
pp probability of infection persistence
… nnode 1 2 3 4 5 6 7 8
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From Ting et al. (2008) Global Ecology & Biogeography
Global patterns in fruiting seasons (season length vs. peak)
NSS
N
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From Weber (2009) Erwerbsobstbau
Two apple pathogens likely to benefit from climate warming
Diplodia serrata Nectria galligena
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From Butterworth et al. (2010) Journal of the Royal Society Interface
Predicted climate change effects on phoma stem canker (Leptosphaeria maculans) on oilseed rape
Yield Yield loss
2050
2020
baseline baseline
2020
2050
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Courtesy of Barbara Howlett, Univ. of Melbourne, Australia
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From Ingram et al. (2008) Agriculture, Ecosystems & Environment
Spatial scale, agriculture, and climate change
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From Hannukkala et al. (2007) Plant Pathology
Early observations of potato late blight (Phytophthora infestans) in Finland
days
aft
er p
lant
ing
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From Garrett et al. (2009) Ecological Applications
Potato late blight (Phytophthora infestans) in Peru
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From Haas et al. (2009) Nature
Genome sequencing for Phytophthora infestans, P. sojae and P. ramorum
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From Smart & Fry (2001) Biological Invasions
Geographical distribution of the Phytophthora infestans mating types
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From Archie et al. (2008) Trends in Ecology & Evolution
Questions addressed in (plant) epidemiology
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From Klein et al. (2008) Environment and Development Economics
The basic SIR model
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From Madden (2006) European Journal of Plant Pathology
SIR model with latency and static/dynamic host
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From Laine & Hanski (2006) Journal of Ecology
Podosphaera plantaginis in SW-Finland (2001-04)
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From Baranauskaite et al. (2008) Semdirbyste-Agriculture
Fireblight (Erwinia amylovora) in Lithuania
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Photo: Cornell University, USA
Fireblight (Erwinia amylovora) on apple
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From Wikimedia Commons, based on data from Oesterreichische Agentur fuer Gesundheit und Ernaehrungssicherheit
Fireblight (Erwinia amylovora) distribution (2008)
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Fire blight epidemic development in Switzerland
From: Eidgenössisches Volkswirtschaftsdepartement, Swiss Confederation
2003 2007
19991995
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From De Wolf & Isard (2007) Annual Review of Phytopathology
Stages of disease cycles considered by plant disease prediction models (1994–2006)
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From Davelos & Jarosz (2004) Journal of Ecology
Life cycles for American chestnut
(a) without / (b) recovering from / (c) with epidemic of chestnut blight
(Cryphonectriaparasitica)
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From Burdon & Thrall (2008) Evolutionary Applications
Pathogen evolution in agro-ecosystems
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From Rodoni (2009) Virus Research
Emerging plant viruses
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References
Dehnen-Schmutz K, Holdenrieder O, Jeger MJ & Pautasso M (2010) Structural change in the international horticultural industry: some implications for plant health. Scientia Horticulturae 125: 1-15Harwood TD, Xu XM, Pautasso M, Jeger MJ & Shaw M (2009) Epidemiological risk assessment using linked network and grid based modelling: Phytophthora ramorum and P. kernoviae in the UK. Ecological Modelling 220: 3353-3361 Jeger MJ & Pautasso M (2008) Comparative epidemiology of zoosporic plant pathogens. European Journal of Plant Pathology 122: 111-126Jeger MJ, Pautasso M, Holdenrieder O & Shaw MW (2007) Modelling disease spread and control in networks: implications for plant sciences. New Phytologist 174: 179-197 MacLeod A, Pautasso M, Jeger MJ & Haines-Young R (2010) Evolution of the international regulation of plant pests and challenges for future plant health. Food Security 2: 49-70 Moslonka-Lefebvre M, Pautasso M & Jeger MJ (2009) Disease spread in small-size directed networks: epidemic threshold, correlation between links to and from nodes, and clustering. J Theor Biol 260: 402-411Moslonka-Lefebvre M, Finley A, Dorigatti I, Dehnen-Schmutz K, Harwood T, Jeger MJ, Xu XM, Holdenrieder O & Pautasso M (2011) Networks in plant epidemiology: from genes to landscapes, countries and continents. Phytopathology 101: 392-403Pautasso M (2009) Geographical genetics and the conservation of forest trees. Perspectives in Plant Ecology, Systematics & Evolution 11: 157-189Pautasso M (2010) Worsening file-drawer problem in the abstracts of natural, medical and social science databases. Scientometrics 85: 193-202Pautasso M et al (2010) Plant health and global change – some implications for landscape management. Biological Reviews 85: 729-755Pautasso M, Moslonka-Lefebvre M & Jeger MJ (2010) The number of links to and from the starting node as a predictor of epidemic size in small-size directed networks. Ecological Complexity 7: 424-432 Pautasso M, Xu XM, Jeger MJ, Harwood T, Moslonka-Lefebvre M & Pellis L (2010) Disease spread in small-size directed trade networks: the role of hierarchical categories. Journal of Applied Ecology 47: 1300-1309Pecher C, Fritz S, Marini L, Fontaneto D & Pautasso M (2010) Scale-dependence of the correlation between human population and the species richness of stream macroinvertebrates. Basic Applied Ecology 11: 272-280Xu XM, Harwood TD, Pautasso M & Jeger MJ (2009) Spatio-temporal analysis of an invasive plant pathogen (Phytophthora ramorum) in England and Wales. Ecography 32: 504-516