The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
권호 표지
DOI QR코드

DOI QR Code

Phytophthora Foot Rot of Wasabi Caused by Phytophthora pseudocryptogea

  • Young-Ju Nam (Global Agro-Consulting Corporation) ;
  • Seung-Yeol Lee (College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Youn-Gi Moon (Wild Vegetable Research Institute, Gangwondo Agricultural Research and Extension Services) ;
  • Weon-Dae Cho (Global Agro-Consulting Corporation) ;
  • Wan-Gyu Kim (Global Agro-Consulting Corporation)
  • Received : 2022.05.06
  • Accepted : 2022.09.13
  • Published : 2022.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In June 2021, foot rot symptoms were observed in wasabi (Eutrema japonicum) plants growing in vinyl greenhouses of the Alpine Agricultural Experiment Station, Wild Vegetable Research Institute, in Taebaek, Gangwon Province, Korea. Diseased plants displayed black soft rot of crowns and petioles at the soil line and wilted. The incidence of diseased plants was 2-10% in four out of five vinyl greenhouses investigated. Eight fungal isolates were obtained from diseased plants. All the isolates were identified as Phytophthora pseudocrytogea based on their morphological characteristics and phylogenetic analysis. Three isolates of P. pseudocrytogea were used for pathogenicity test on wasabi plants via artificial inoculation. The pathogenicity of the isolates was confirmed in the inoculated wasabi plants. The symptoms shown by the inoculated plants were similar to those observed in plants from the investigated vinyl greenhouses. This is the first report of P. pseudocryptogea causing Phytophthora foot rot in wasabi.

Keywords

Acknowledgement

This study was supported by a research grant (PJ014507012020) from the Rural Development Administration, Korea.

References

  1. Plants of the World Online. Eutrema japonicum (Miq.) Koidz. [Internet]. Kew: Royal Botanic Garden; 2022 [cited 2022 May 3]. Available from https://powo.science.kew.org/.
  2. Chadwick CI, Lumpkin TA, Elberson LR. The botany, uses and production of Wasabia japonica (Miq.) (Cruciferae) Matsum. Econ Bot 1993;47:113-35. https://doi.org/10.1007/BF02862015
  3. Safaiefarahani B, Mostowfizadeh-Ghalamfarsa R, Hardy GEStJ, Burgress, TI. Re-evaluation of the Phytophthora cryptogea species complex and the description of a new species, Phytophthora pseudocryptogea sp. nov. Mycol Progr 2015;14:108(1-12). https://doi.org/10.1007/s11557-015-1022-6
  4. Blair JE, Coffey MD, Park SY, Geiser DM, Kang S. A multi-locus phylogeny for Phytophthora utilizing markers derived from complete genome sequences. Fungal Genet Biol 2008;45:266-77. https://doi.org/10.1016/j.fgb.2007.10.010
  5. Kroon LPNM, Bakker FT, Van den Bosch GBM, Bonants PJM, Flier WG. Phylogenetic analysis of Phytophthora species based on mitochondrial and nuclear DNA sequences. Fungal Genet Biol 2004;41:766-82.
  6. Kumar S, Stecher G, Li M, Knyaz C, Tamura, K. MEGA X: molecular evolutionary genetics analysis across computing platforms. Mol Biol Evol 2018;35: 1547-9. https://doi.org/10.1093/molbev/msy096
  7. Granke, LL, Harlan BR, Naegele RP, Hausbeck MK. First report of root and crown rot of wasabi (Wasabia japonica Matsum.) caused by Phytophthora cryptogea in Michigan. Plant Dis 2012;96:1379.
  8. Minoshima A, Takeuchi J, Ono T, Kagiwada S, Horie H, Hirooka Y. First report of phytophthora rot on Wasabia japonica caused by Phytophthora drechsleri in Japan. J Gen Plant Pathol 2017;83:113-6.
  9. Farr DF, Rossman AY. Fungal databases [Internet]. Washington, D.C., U.S. National Fungus Collections, ARS, USDA; 2022 [cited 2022 May 3]. Available from https://nt.ars-grin.gov/fungaldatabases/.