The role of oospores in the epidemiology of potato late blight

G.J.T. Kessel, B. Andersson, A.K. Widmark, J.E. Yuen, A. Evenhuis, L.J. Turkensteen, A. Lehtinen, B. Nielsen, S. Ravnskov, J.G. Hansen, A. Hermansen, M.B. Brurberg, B. Nordskog

Research output: Chapter in Book/Report/Conference proceedingConference paper

12 Citations (Scopus)

Abstract

Potato late blight (Phytophthora infestans) is a plant disease feared globally by farmers and the potato industry. P. infestans is a heterothallic oomycete with two mating types. Until recently the pathogen was limited to surviving between seasons as living mycelia in its host plant in most parts of the world. This was due to the fact that populations of P. infestans consisted of only one mating type (A1) in all parts of the world except Mexico, the putative centre of origin of the pathogen. Migration of new genotypes from Mexico, including genotypes of the second mating type (A2) has resulted in that now both mating types can be found worldwide. The formation of oospores is only possible if both mating types coexist. Oospores will give the pathogen the ability of surviving for extended periods of time outside its host, for example in the soil. There are reports of oospore formation under field conditions from many parts of the world. Also, in some places oospores are considered as a new, additional inoculum source and as a consequence the onset of late blight epidemics have become earlier. Oospores are formed through sexual recombination. If they act as a source of inoculum, this will increase the genotypic variation in populations of P. infestans leading to an enhanced adaptability of the pathogen. As a consequence, an earlier start of epidemics caused by oospores in the soil and a more aggressive behaviour of the pathogen due to new sexually formed genotypes could make potato late blight even more difficult to control in the future
Original languageEnglish
Title of host publicationISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008
EditorsG.A. Forbes, F.P.M. Govers, W.E. Fry
Place of PublicationLeuven, Belgium
PublisherISHS
Pages61-68
Volume834
ISBN (Print)9789066055728
DOIs
Publication statusPublished - 2009
EventThe Third International Late Blight Conference - Beijing, China
Duration: 3 Apr 20086 Apr 2008

Conference

ConferenceThe Third International Late Blight Conference
CountryChina
CityBeijing
Period3/04/086/04/08

Fingerprint

oospores
Phytophthora infestans
epidemiology
pathogens
genotype
inoculum
Mexico
center of origin
Oomycetes
plant diseases and disorders
mycelium
aggression
soil
host plants
mating types
potatoes
farmers
industry

Cite this

Kessel, G. J. T., Andersson, B., Widmark, A. K., Yuen, J. E., Evenhuis, A., Turkensteen, L. J., ... Nordskog, B. (2009). The role of oospores in the epidemiology of potato late blight. In G. A. Forbes, F. P. M. Govers, & W. E. Fry (Eds.), ISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008 (Vol. 834, pp. 61-68). Leuven, Belgium: ISHS. https://doi.org/10.17660/ActaHortic.2009.834.5
Kessel, G.J.T. ; Andersson, B. ; Widmark, A.K. ; Yuen, J.E. ; Evenhuis, A. ; Turkensteen, L.J. ; Lehtinen, A. ; Nielsen, B. ; Ravnskov, S. ; Hansen, J.G. ; Hermansen, A. ; Brurberg, M.B. ; Nordskog, B. / The role of oospores in the epidemiology of potato late blight. ISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008. editor / G.A. Forbes ; F.P.M. Govers ; W.E. Fry. Vol. 834 Leuven, Belgium : ISHS, 2009. pp. 61-68
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abstract = "Potato late blight (Phytophthora infestans) is a plant disease feared globally by farmers and the potato industry. P. infestans is a heterothallic oomycete with two mating types. Until recently the pathogen was limited to surviving between seasons as living mycelia in its host plant in most parts of the world. This was due to the fact that populations of P. infestans consisted of only one mating type (A1) in all parts of the world except Mexico, the putative centre of origin of the pathogen. Migration of new genotypes from Mexico, including genotypes of the second mating type (A2) has resulted in that now both mating types can be found worldwide. The formation of oospores is only possible if both mating types coexist. Oospores will give the pathogen the ability of surviving for extended periods of time outside its host, for example in the soil. There are reports of oospore formation under field conditions from many parts of the world. Also, in some places oospores are considered as a new, additional inoculum source and as a consequence the onset of late blight epidemics have become earlier. Oospores are formed through sexual recombination. If they act as a source of inoculum, this will increase the genotypic variation in populations of P. infestans leading to an enhanced adaptability of the pathogen. As a consequence, an earlier start of epidemics caused by oospores in the soil and a more aggressive behaviour of the pathogen due to new sexually formed genotypes could make potato late blight even more difficult to control in the future",
author = "G.J.T. Kessel and B. Andersson and A.K. Widmark and J.E. Yuen and A. Evenhuis and L.J. Turkensteen and A. Lehtinen and B. Nielsen and S. Ravnskov and J.G. Hansen and A. Hermansen and M.B. Brurberg and B. Nordskog",
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Kessel, GJT, Andersson, B, Widmark, AK, Yuen, JE, Evenhuis, A, Turkensteen, LJ, Lehtinen, A, Nielsen, B, Ravnskov, S, Hansen, JG, Hermansen, A, Brurberg, MB & Nordskog, B 2009, The role of oospores in the epidemiology of potato late blight. in GA Forbes, FPM Govers & WE Fry (eds), ISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008. vol. 834, ISHS, Leuven, Belgium, pp. 61-68, The Third International Late Blight Conference, Beijing, China, 3/04/08. https://doi.org/10.17660/ActaHortic.2009.834.5

The role of oospores in the epidemiology of potato late blight. / Kessel, G.J.T.; Andersson, B.; Widmark, A.K.; Yuen, J.E.; Evenhuis, A.; Turkensteen, L.J.; Lehtinen, A.; Nielsen, B.; Ravnskov, S.; Hansen, J.G.; Hermansen, A.; Brurberg, M.B.; Nordskog, B.

ISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008. ed. / G.A. Forbes; F.P.M. Govers; W.E. Fry. Vol. 834 Leuven, Belgium : ISHS, 2009. p. 61-68.

Research output: Chapter in Book/Report/Conference proceedingConference paper

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AU - Kessel, G.J.T.

AU - Andersson, B.

AU - Widmark, A.K.

AU - Yuen, J.E.

AU - Evenhuis, A.

AU - Turkensteen, L.J.

AU - Lehtinen, A.

AU - Nielsen, B.

AU - Ravnskov, S.

AU - Hansen, J.G.

AU - Hermansen, A.

AU - Brurberg, M.B.

AU - Nordskog, B.

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N2 - Potato late blight (Phytophthora infestans) is a plant disease feared globally by farmers and the potato industry. P. infestans is a heterothallic oomycete with two mating types. Until recently the pathogen was limited to surviving between seasons as living mycelia in its host plant in most parts of the world. This was due to the fact that populations of P. infestans consisted of only one mating type (A1) in all parts of the world except Mexico, the putative centre of origin of the pathogen. Migration of new genotypes from Mexico, including genotypes of the second mating type (A2) has resulted in that now both mating types can be found worldwide. The formation of oospores is only possible if both mating types coexist. Oospores will give the pathogen the ability of surviving for extended periods of time outside its host, for example in the soil. There are reports of oospore formation under field conditions from many parts of the world. Also, in some places oospores are considered as a new, additional inoculum source and as a consequence the onset of late blight epidemics have become earlier. Oospores are formed through sexual recombination. If they act as a source of inoculum, this will increase the genotypic variation in populations of P. infestans leading to an enhanced adaptability of the pathogen. As a consequence, an earlier start of epidemics caused by oospores in the soil and a more aggressive behaviour of the pathogen due to new sexually formed genotypes could make potato late blight even more difficult to control in the future

AB - Potato late blight (Phytophthora infestans) is a plant disease feared globally by farmers and the potato industry. P. infestans is a heterothallic oomycete with two mating types. Until recently the pathogen was limited to surviving between seasons as living mycelia in its host plant in most parts of the world. This was due to the fact that populations of P. infestans consisted of only one mating type (A1) in all parts of the world except Mexico, the putative centre of origin of the pathogen. Migration of new genotypes from Mexico, including genotypes of the second mating type (A2) has resulted in that now both mating types can be found worldwide. The formation of oospores is only possible if both mating types coexist. Oospores will give the pathogen the ability of surviving for extended periods of time outside its host, for example in the soil. There are reports of oospore formation under field conditions from many parts of the world. Also, in some places oospores are considered as a new, additional inoculum source and as a consequence the onset of late blight epidemics have become earlier. Oospores are formed through sexual recombination. If they act as a source of inoculum, this will increase the genotypic variation in populations of P. infestans leading to an enhanced adaptability of the pathogen. As a consequence, an earlier start of epidemics caused by oospores in the soil and a more aggressive behaviour of the pathogen due to new sexually formed genotypes could make potato late blight even more difficult to control in the future

U2 - 10.17660/ActaHortic.2009.834.5

DO - 10.17660/ActaHortic.2009.834.5

M3 - Conference paper

SN - 9789066055728

VL - 834

SP - 61

EP - 68

BT - ISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008

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PB - ISHS

CY - Leuven, Belgium

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Kessel GJT, Andersson B, Widmark AK, Yuen JE, Evenhuis A, Turkensteen LJ et al. The role of oospores in the epidemiology of potato late blight. In Forbes GA, Govers FPM, Fry WE, editors, ISHS Acta Horticulturae 834: III International Late Blight Conference, Beijing, China, 3-6 April 2008. Vol. 834. Leuven, Belgium: ISHS. 2009. p. 61-68 https://doi.org/10.17660/ActaHortic.2009.834.5