Erwinia persicina associated with a pink rot of parsley root in Germany
- 91 Downloads
A distinctively pink soft rot has been repeatedly observed on samples of root parsley (Petroselinum crispum var. tuberosum) from different regions in Germany since 2015, and pink pigmented bacteria were consistently isolated from these roots. As indicated by their biochemical properties and sequences of the gapDH and rpoD genes, the parsley strains were identified as Erwinia persicina, a species closely related to E. rhapontici. In pathogenicity tests, E. persicina was shown to successfully colonise healthy parsley roots after wound inoculation. However, the developing rot was not as pronounced as in the field samples, and other as-yet unknown factors such as environmental conditions, feeding insects, or other pathogenic microorganisms seem to be contributing to symptom expression in parsley roots. As suggested by reisolations performed from the inoculated roots, fresh commercial parsley roots may be latently contaminated with both E. persicina and Pectobacterium carotovorum subsp. carotovorum. The latter in particular might be part of a complex of factors leading to the distinctively severe symptoms observed. The characteristic colour of the affected roots suggests the involvement of E. persicina and the name “pink rot of parsley root” for this previously undescribed disease.
KeywordsBacterial disease Erwinia rhapontici Pectobacterium carotovorum Petroselinum crispum Root vegetable Soft rot
The authors wish to thank Melanie Friedrich-Zorn, Bianka Huber and Sigrid Ziegltrum for excellent technical support. Birgit Zange (Hochschule Weihenstephan Triesdorf) and Korbinian Bogner (Bioland e.V.) are acknowledged for the good cooperation during an early phase of the project, and for providing samples.
Compliance with ethical standards
Conflict of interest
All authors declare that they have no conflict of interest.
- Anonymus (2017) Petersilienwurzeln und Pastinaken wieder voll im Trend. Proplanta. https://www.proplanta.de/Agrar-Nachrichten/Pflanze/Petersilienwurzeln-und-Pastinaken-wieder-voll-im-Trend_article1508915495.html. Accessed 01 Aug 2018
- Hall TA (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucl Acids Symp Ser 41:95–98Google Scholar
- Huang H-C, Hsieh T-F, Erickson RS (2003) Biology and epidemiology of Erwinia rhapontici, causal agent of pink seed and crown rot of plants. Plant Pathol Bull 12:69–76Google Scholar
- Huang H-C, Erickson RS, Hsieh T-F (2007) Lack of host specificity of strains of Erwinia rhapontici, causal agent of pink seed of pulse and cereal crops. Bot Stud 48:181–186Google Scholar
- Sturhan D, Brzeski MW (1991) Stem and bulb nematodes, Ditylenchus spp. In: Nickle WR (ed) Manual of agricultural nematology. Marcel Dekker Inc., New York, pp 423–464Google Scholar
- Veldhoff D (2016) Strategien zur Reduzierung von bakteriellen Krankheiten im bayerischen Gemüsebau. Project report. Bayerisches Staatsministerium für Ernährung, Landwirtschaft und Forsten, München, 51 pGoogle Scholar
- Wensing A, Ullrich M, Gehring I, Geider K (2009) Erwinia rhapontici und E. persicina als geeignete Antagonisten gegen Feuerbrand? J Cultiv Plants 61:380Google Scholar
- Zhang Z, Nan Z (2014) Erwinia persicina, a possible new necrosis and wilt threat to forage or grain legumes production. Eur J Plant Pathol 139:343–352Google Scholar