Helicobasidium mompa

Last updated

Helicobasidium mompa
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Pucciniomycetes
Order: Helicobasidiales
Family: Helicobasidiaceae
Genus: Helicobasidium
Species:
H. mompa
Binomial name
Helicobasidium mompa
Nobuj. Tanaka (1891)
Synonyms

Septobasidium mompa(Nobuj. Tanaka) Racib. (1909)
Stypinella mompa(Nobuj. Tanaka) Lindau (1895)

Contents

Helicobasidium mompa is a species of fungus in the subdivision Pucciniomycotina. Basidiocarps (fruit bodies) are corticioid (patch-forming) and are typically violet to purple. Microscopically they have auricularioid (laterally septate) basidia. [1] Helicobasidium mompa is an opportunistic plant pathogen and is one of the causes of violet root rot of crops and other plants. DNA sequencing suggests that it is a distinct, eastern Asian species. [2] [3]

Taxonomy

Helicobasidium mompa was first described in 1891 by Japanese mycologist Nobujiro Tanaka for a species found on mulberry in Japan that was similar to the European Helicobasidium purpureum , but with basidiospores depicted as ovoid and of slightly smaller size. In 1955 Seiya Ito synonymized the long-spored H. mompa f. macrosporum and H. compactum with the short-spored H. mompa. [1] As a result at least some subsequent references to H. mompa refer to a long-spored species. [3] A 1999 study considered H. mompa a nomen dubium (a name of unknown application) because of uncertainty concerning its description and interpretation. [1] Initial molecular research, based on cladistic analysis of DNA sequences, indicates, however, that Japanese and Korean specimens determined as H. mompa form a grouping distinct from those named Helicobasidium longisporum or H. purpureum. [3] [2] [4]

Description

Basidiocarps are corticioid smooth, membranaceous, purple to purple-brown. Microscopically the hyphae are easily visible, 5-8 μm diam., brownish-purple, and lack clamp connections. Basidia are tubular, curved or crook-shaped, and auricularioid (laterally septate). Basidiospores were originally described as ovoid, 10 -12 x 5 -7 μm, [1] but have been re-interpreted as elongated, 10–23 x 4–7.5 μm. [3]

Distribution

Helicobasidium mompa has been recorded mainly from temperate areas of Japan, Korea, and China. [3] [4] It is reported to cause violet root rot of various crops. [3]

References

  1. 1 2 3 4 Roberts P. (1999). Rhizoctonia-forming fungi. Kew: Royal Botanic Gardens. p. 239. ISBN   978-1-900347-69-3.
  2. 1 2 Lutz M, Bauer R, Begerow D, Oberwinkler F (2004). "Tuberculina-Thanatophytum/Rhizoctonia crocorum-Helicobasidium: a unique mycoparasitic-phytoparasitic life strategy". Mycol Res. 108 (3): 227–238. doi:10.1017/s0953756204009359. PMID   15185975.
  3. 1 2 3 4 5 6 Nakamura H, Ikeda K, Arakawa M, Akahira T, Matsumoto N (2004). "A comparative study of the violet root rot fungi, Helicobasidium brebissonii and H. mompa, from Japan". Mycological Research. 108 (6): 641–648. doi:10.1017/S0953756204009785. PMID   15323246.
  4. 1 2 Hong SK, Kim WG, Choi HW, Lee YL, Shim HS (2011). "Occurrence of violet root rot on membranous milk vetch caused by Helicobasidium mompa in Korea". Mycobiology. 39 (4): 321–323. doi: 10.5941/MYCO.2011.39.4.321 . PMC   3385128 . PMID   22783126.