Helicobasidium purpureum
| Helicobasidium purpureum | |
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Helicobasidium purpureum on carrot (Daucus carota) |
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| Scientific classification | |
| Kingdom: | Fungi |
| Phylum: | Basidiomycota |
| Class: | Pucciniomycetes |
| Subclass: | Incertae sedis |
| Order: | Helicobasidiales |
| Family: | Helicobasidiaceae |
| Genus: | Helicobasidium |
| Species: | H. purpureum |
| Binomial name | |
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Helicobasidium purpureum (Tul.) Pat. 1885 |
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| Synonyms | |
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Corticium sanguineum var. lilacinum |
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Corticium sanguineum var. lilacinum
Helicobasidium brebissonii (Desm.) Donk, (1958)
Hypochnus purpureus
Protonema brebissonii
Rhizoctonia asparagi
Rhizoctonia crocorum
Rhizoctonia medicaginis
Rhizoctonia rubiae
Rhizoctonia violacea
Rhizoctonia violacea f. dauci
Sclerotium crocorum
Thanatophytum crocorum
Tuber parasiticum
Helicobasidium purpureum is a fungal plant pathogen which causes violet root rot in a number of susceptible plant hosts. It is synonymous with Helicobasidium brebissonii (Desm.) Donk. It is the teleomorph of Tuberculina persicina which is its mycoparasitic anamorph.
There are three varieties:
Helicobasidium purpureum has a cosmopolitan distribution and is found in all regions in which its host plants grow.
In the United Kingdom, colonies of Helicobasidium purpureum have been found on the living stems of dog's mercury (Mercurialis perennis) and stinging nettle (Urtica dioica). The fungus is also associated as a saprobe with decaying wood and stumps of broad leaf trees. Its rhizoctonian anamorph infects the roots of carrot (Daucus carota), parsnip (Pastinaca sativa), swede (Brassica napus ssp rapifera), turnip (Brassica rapa), celery (Apium graveolens), asparagus (Asparagus officinalis), beetroot (Beta vulgaris), potato (Solanum tuberosum) and sea kale (Crambe maritima). Wild plants on which it has been found felting the roots with purple or brown mycelium include chickweed (Stellaria) spp., sow thistles (Sonchus) spp., nettles (Urtica) spp., shepherd's purse (Capsella bursa-pastoris) and yarrow (Achillea millefolium).
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