Review article    |    Open Access
HELIA 2026, Vol. 49(84) 89-100

Proteomics in Downy Mildew and Related Oomycete Pathogens: Current Knowledge and the Unexplored Proteome of Plasmopara halstedii

Aslıhan Günel

pp. 89 - 100   |  DOI: https://doi.org/10.29329/helia.2026.1446.6

Publish Date: July 30, 2026  |   Single/Total View: 1/1   |   Single/Total Download: 1/1


Abstract

Downy mildew pathogens are obligate biotrophic oomycetes responsible for destructive diseases in many agricultural crops. Among them, Plasmopara halstedii, the causal agent of sunflower downy mildew, represents a major threat to sunflower production worldwide. While extensive research has focused on the genetics of host resistance and the pathogenic variability of this organism, information regarding the proteins involved in its infection process remains limited. Proteomic approaches have increasingly been used to study plant–pathogen interactions, as they enable the direct identification of proteins produced during infection. In oomycete pathogens such as Phytophthora species, proteomic studies have revealed numerous proteins associated with host colonization, virulence, and stress adaptation. However, comparable large-scale proteomic investigations are still scarce for downy mildew pathogens, particularly for P. halstedii. This review summarizes current knowledge on proteomic studies in oomycete plant pathogens and discusses the limited information available on proteins of P. halstedii. The review also highlights key research gaps and potential directions for future proteomic investigations.

Keywords: Downy Mildew, Oomycete Pathogens, Plasmopara halstedii, Proteomics, Sunflower


How to Cite this Article?

APA 7th edition
Gunel, A. (2026). Proteomics in Downy Mildew and Related Oomycete Pathogens: Current Knowledge and the Unexplored Proteome of Plasmopara halstedii. HELIA, 49(84), 89-100. https://doi.org/10.29329/helia.2026.1446.6

Harvard
Gunel, A. (2026). Proteomics in Downy Mildew and Related Oomycete Pathogens: Current Knowledge and the Unexplored Proteome of Plasmopara halstedii. HELIA, 49(84), pp. 89-100.

Chicago 16th edition
Gunel, Aslihan (2026). "Proteomics in Downy Mildew and Related Oomycete Pathogens: Current Knowledge and the Unexplored Proteome of Plasmopara halstedii". HELIA 49 (84):89-100. https://doi.org/10.29329/helia.2026.1446.6

References
  1. Anup, C. P., Melvin, P., Shilpa, N., Gandhi, M. N., Jadhav, M., Ali, H., & Kini, K. R. (2015). Proteomic analysis of elicitation of downy mildew disease resistance in pearl millet by seed priming with β-aminobutyric acid and Pseudomonas fluorescens. J Proteomics, 120, 58–74. https://doi.org/10.1016/j.jprot.2015.02.013 [Google Scholar] [Crossref] 
  2. As-Sadi, F., Carrere, S., Gascuel, Q., Hourlier, T., Rengel, D., Le Paslier, M.-C., Bordat, A., Boniface, M.-C., Brunel, D., & Gouzy, J. (2011). Transcriptomic analysis of the interaction between Helianthus annuus and its obligate parasite Plasmopara halstedii shows single nucleotide polymorphisms in CRN sequences. BMC Genomics, 12(1), 498. [Google Scholar]
  3. B. Santos, R., Nascimento, R., V. Coelho, A., & Figueiredo, A. (2020). Grapevine–downy mildew rendezvous: Proteome analysis of the first hours of an incompatible interaction. Plants, 9(11), 1498. [Google Scholar]
  4. Bharti, S., & Thines, M. (2023). Conservation of putative transcription factor binding sites of co-expressed Plasmopara halstedii genes in two Phytophthora species. Mycological Progress, 22(9), 63. https://doi.org/10.1007/s11557-023-01911-7 [Google Scholar] [Crossref] 
  5. Demirci, Y. E., Inan, C., Günel, A., Maytalman, D., Mert, Z., Baykal, A. T., Korkut, Ş. V., Arda, N., & Hasançebi, S. (2016). Proteome profiling of the compatible interaction between wheat and stripe rust. European Journal of Plant Pathology, 145(4), 941–962. https://doi.org/10.1007/s10658-016-0882-1 [Google Scholar] [Crossref] 
  6. Gascuel, Q., Buendia, L., Pecrix, Y., Blanchet, N., Muños, S., Vear, F., & Godiard, L. (2016). RXLR and CRN effectors from the sunflower downy mildew pathogen plasmopara halstedii induce hypersensitive-like responses in resistant sunflower lines [Article]. Frontiers in Plant Science, 7(DECEMBER2016), Article 1887. https://doi.org/10.3389/fpls.2016.01887 [Google Scholar] [Crossref] 
  7. Guo, Y., Krasnow, C. S., & Hausbeck, M. K. (2024). Characterizing the Dynamics of Virulence and Fungicide Resistance of Phytophthora capsici in Michigan Vegetable Fields Reveals Loci Associated with Virulence. Plant Dis, 108(2), 332–341. https://doi.org/10.1094/pdis-03-23-0576-re [Google Scholar] [Crossref] 
  8. Hannat, S., Hasni, I., Decloquement, P., Diene, S., Azza, S., La Scola, B., & Aherfi, S. (2023). Proteomics of the oomycete Phytophthora parasitica strain INRA 310. Crops, 3(2), 116–123. [Google Scholar]
  9. Jadhav, K., Ranjani, R. V., Senthil, N., Arulkumar, N., Tamilarasi, P., Sumathi, K., Ganesan, K., Paranidharan, V., Raveendran, M., & Kim, G. S. (2018). Proteomic analysis of a compatible interaction between sorghum downy mildew pathogen (Peronosclerospora sorghi) and maize (Zea mays L.). Int. J. Curr. Microbiol. Appl. Sci, 7, 653–670. [Google Scholar]
  10. Jung, S., Fladerer, C., Braendle, F., Madlung, J., Spring, O., & Nordheim, A. (2010). Identification of a novel Plasmopara halstedii elicitor protein combining de novo peptide sequencing algorithms and RACE-PCR. Proteome Sci, 8, 24. https://doi.org/10.1186/1477-5956-8-24 [Google Scholar] [Crossref] 
  11. Kamoun, S. (2006). A catalogue of the effector secretome of plant pathogenic oomycetes. Annu Rev Phytopathol, 44, 41–60. https://doi.org/10.1146/annurev.phyto.44.070505.143436 [Google Scholar] [Crossref] 
  12. Kaya, Y., Jocic, S., & Miladinovic, D. (2012). Sunflower. In S. K. Gupta (Ed.), Technological Innovations in Major World Oil Crops, Volume 1: Breeding (pp. 85–129). Springer New York. https://doi.org/10.1007/978-1-4614-0356-2_4 [Google Scholar] [Crossref] 
  13. Li, J., Liu, X., Yang, X., Li, Y., Wang, C., & He, D. (2018). Proteomic analysis of the impacts of powdery mildew on wheat grain. Food Chemistry, 261, 30–35. https://doi.org/https://doi.org/10.1016/j.foodchem.2018.04.024 [Google Scholar] [Crossref] 
  14. Liu, G.-T., Wang, B.-B., Lecourieux, D., Li, M.-J., Liu, M.-B., Liu, R.-Q., Shang, B.-X., Yin, X., Wang, L.-J., Lecourieux, F., & Xu, Y. (2021). Proteomic analysis of early-stage incompatible and compatible interactions between grapevine and P. viticola. Horticulture Research, 8. https://doi.org/10.1038/s41438-021-00533-y [Google Scholar] [Crossref] 
  15. Mahadevan, C., Krishnan, A., Saraswathy, G. G., Surendran, A., Jaleel, A., & Sakuntala, M. (2016). Transcriptome-assisted label-free quantitative proteomics analysis reveals novel insights into Piper nigrum—Phytophthora capsici Phytopathosystem. Frontiers in plant science, 7, 785. [Google Scholar]
  16. Meijer, H. J., Mancuso, F. M., Espadas, G., Seidl, M. F., Chiva, C., Govers, F., & Sabidó, E. (2014). Profiling the secretome and extracellular proteome of the potato late blight pathogen Phytophthora infestans. Mol Cell Proteomics, 13(8), 2101–2113. https://doi.org/10.1074/mcp.M113.035873 [Google Scholar] [Crossref] 
  17. Molinero-Ruiz, L. (2022). Sustainable and efficient control of sunflower downy mildew by means of genetic resistance: a review. Theoretical and Applied Genetics, 135(11), 3757–3771. https://doi.org/10.1007/s00122-022-04038-7 [Google Scholar] [Crossref] 
  18. Pecrix, Y., Dvorak, E., Labbé, F., Legrand, L., Carrère, S., Gouzy, J., Delmotte, F., Besnard, G., & Godiard, L. (2026). Phylogenomics of Plasmopara halstedii Reveals Genomic Regions Associated With the Breakdown of Sunflower Downy Mildew Resistance Genes [Article]. Molecular Ecology, 35(4), Article e70270. https://doi.org/10.1111/mec.70270 [Google Scholar] [Crossref] 
  19. Pham, J., Whisson, S. C., Hurst, C. H., Chapman, S., & Birch, P. R. (2026). Isolation and proteomic analysis of intracellular vesicles from the potato late blight pathogen Phytophthora infestans. Scientific Reports. [Google Scholar]
  20. Resjö, S., Brus, M., Ali, A., Meijer, H. J., Sandin, M., Govers, F., Levander, F., Grenville-Briggs, L., & Andreasson, E. (2017). Proteomic analysis of Phytophthora infestans reveals the importance of cell wall proteins in pathogenicity. Molecular & Cellular Proteomics, 16(11), 1958–1971. [Google Scholar]
  21. Rivera, Y., Salgado-Salazar, C., Gulya, T. J., & Crouch, J. A. (2016). Newly Emerged Populations of Plasmopara halstedii Infecting Rudbeckia Exhibit Unique Genotypic Profiles and Are Distinct from Sunflower-Infecting Strains. Phytopathology, 106(7), 752–761. https://doi.org/10.1094/phyto-12-15-0335-r [Google Scholar] [Crossref] 
  22. Sackston, W., & Vimard, B. (1988). Leaf disk immersion (LDI) inoculation of sunflower with Plasmopara halstedii for in vitro determination of host-pathogen relationships. [Google Scholar]
  23. Sharma, R., Xia, X. J., Cano, L. M., Evangelisti, E., Kemen, E., Judelson, H., Oome, S., Sambles, C., van den Hoogen, D. J., Kitner, M., Klein, J., Meijer, H. J. G., Spring, O., Win, J., Zipper, R., Bode, H. B., Govers, F., Kamoun, S., Schornack, S.,…Thines, M. (2015). Genome analyses of the sunflower pathogen Plasmopara halstedii provide insights into effector evolution in downy mildews and Phytophthora. Bmc Genomics, 16, Article 741. https://doi.org/10.1186/s12864-015-1904-7 [Google Scholar] [Crossref] 
  24. Thines, M. (2014). Phylogeny and evolution of plant pathogenic oomycetes—a global overview. European Journal of Plant Pathology, 138(3), 431–447. [Google Scholar]
  25. Tourvieille de Labrouhe, D., Serre, F., Walser, P., Roche, S., & Vear, F. (2008). Quantitative resistance to downy mildew (Plasmopara halstedii) in sunflower (Helianthus annuus). Euphytica, 164(2), 433–444. [Google Scholar]
  26. Viranyi, F., Gulya, T. J., & Tourvieille, D. L. (2015). Recent changes in the pathogenic variability of Plasmopara halstedii (sunflower downy mildew) populations from different continents. Helia, 38(63), 149–162. [Google Scholar]
  27. Viranyi, F., & Spring, O. (2011). Advances in sunflower downy mildew research. European Journal of Plant Pathology, 129(2), 207–220. https://doi.org/10.1007/s10658-010-9683-0 [Google Scholar] [Crossref] 
  28. Zhang, Y., Fletcher, K., Han, R., Michelmore, R., & Yang, R. (2020). Genome-Wide Analysis of Cyclophilin Proteins in 21 Oomycetes. Pathogens, 9(1), 24. [Google Scholar]