European Journal of Plant Pathology

, Volume 125, Issue 1, pp 159–171 | Cite as

Comparison of mycelial proteomes of two Verticillium albo-atrum pathotypes from hop

  • Stanislav Mandelc
  • Sebastjan Radisek
  • Polona Jamnik
  • Branka JavornikEmail author


Verticillium wilt diseases caused by Verticillium spp. are known in many important crops and can seriously threaten their production. We studied Verticillium albo-atrum by comparative analysis of the proteome of four hop isolates, classified by the severity of wilt symptoms as mild and lethal pathotypes, from two geographic origins. A two-dimensional electrophoresis reference map of mycelium proteins was first established, resolving up to 650 protein spots on Coomassie-stained gels in a range of pH 4–7 and MW 14 – 116 kDa. The average coefficient of variance for the 268 matched protein spots was 16% and 15%, respectively, for technical and biological variability. Principal component analysis (PCA) discriminated the geographic origin of the isolates and between the two pathotypes and showed a closer relationship among English isolates than Slovene ones. The two-dimensional electrophoresis patterns of one mild (PG1) with one lethal pathotype (PG2) from Slovenia and one mild (M) with one lethal pathotype (PV1) from England were compared. A total of 27 and 30 spots were found differentially expressed between the pathotypes, which were analysed by tandem mass spectrometry. Fifty-three proteins were identified, of which 17 matched proteins with annotated functions. The lethal pathotypes showed increased expression of peroxiredoxine and ascorbate peroxidase, a higher level of cytoskeleton components and regulators, and a higher rate of protein synthesis and energy metabolism. These results reveal differences in the expression level of the identified proteins between the two pathotypes and are discussed in relation to virulence.


Fungi Proteomic Two-dimensional electrophoresis Virulence 



This study was funded by the Ministry of Higher Education, Science and Technology; contracts no. L4-7179, P4-0077 and S4-486-116/1000-05-310050. The authors thank Dr. Rajcevic Uros from NorLux Neuro-Oncology/Crp Sante, Luxembourg, for help in interpreting MS/MS data. We are grateful to Dr. Jesus Jorrin from the Department of Biochemistry and Molecular Biology, University of Cordoba, Cordoba, Spain, for critical reading of the manuscript and for thoughtful suggestions.

Supplementary material

10658_2009_9467_MOESM1_ESM.xls (91 kb)
ESM 1 (XLS 91 kb)


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Copyright information

© KNPV 2009

Authors and Affiliations

  • Stanislav Mandelc
    • 1
  • Sebastjan Radisek
    • 2
  • Polona Jamnik
    • 3
  • Branka Javornik
    • 1
    Email author
  1. 1.Biotechnical Faculty, Agronomy DepartmentUniversity of LjubljanaLjubljanaSlovenia
  2. 2.Slovenian Institute for Hop Research and BrewingZalecSlovenia
  3. 3.Biotechnical Faculty, Food Science and Technology DepartmentUniversity of LjubljanaLjubljanaSlovenia

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