Neofabraea

Neofabraea is a genus of fungi in the family Dermateaceae.[1] The genus contains 12 species.[2]

Neofabraea
Apple twigs with symptoms of bull's-eye rot infection caused by Neofabraea malicorticis. This disease is also sometimes referred to as the northwestern anthracnose canker. Image citation: H.J. Larsen, Bugwood.org
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Leotiomycetes
Order: Helotiales
Family: Dermateaceae
Genus: Neofabraea
H.S. Jacks.
Type species
Neofabraea malicorticis
H.S. Jacks.

Taxonomy

A morphological monograph of Neofabraea and the related Pezicula and their asexual states[3] stimulated the description of many new species and a multigene phylogeny based on rDNA, RPB2 and TUB2 (beta-tubulin) sequences.[4]

Many of the asexual states were formerly classified in the coelomycete genus Cryptosporiopsis.

Morphology

Sexual states are often associated with cankers on bark, and are leathery black, brown, grey, or reddish apothecia about 1–2 mm diam. that usually lack a stipe, and have 8-spored cylindrical to club-shaped asci, often with an apical ring, and ellipsoidal to curved 1-celled, hyaline ascospores that sometimes germinate and produce conidia from phialides. Asexual states have stromatic coelomycetous conidiomata (which are often sporodochium-like when growing in agar culture) with slimy, cylindrical, ellipsoidal or fusiform 1-celled macroconidia and/or 1-celled cylindrical microconidia.[3]

Ecology and pathology

Most Neofabraeae species are temperate and associated with living trees; they often sporulate or maker cankers on recently killed or fallen branches, or are isolated as endophytes from living branches or roots. Some species are weak bark, leaf or root pathogens.

Some Neofabraea species are serious plant pathogens in apple and pear orchards around the world that canker-bearing trees are usually removed.[3] Neofabraea malicorticis, N. perennans and N. keinholzii cause apple anthracnose and post-harvest bull's eye rot. Bull's eye rot is somewhat amenable to control by fungicides, but effectiveness varies by species.[5] Conventional and multiplex PCR assays for several species are available, derived from TUB2 (beta-tubulin) sequences.[6]

See also

References
  1. Lumbsch TH, Huhndorf SM (December 2007). "Outline of Ascomycota – 2007". Myconet. Chicago, USA: The Field Museum, Department of Botany. 13: 1–58.
  2. Kirk PM, Cannon PF, Minter DW, Stalpers JA (2008). Dictionary of the Fungi (10th ed.). Wallingford: CABI. p. 463. ISBN 978-0-85199-826-8.
  3. Verkley, GJM (1999). "A Monograph of the Genus Pezicula and its Anamorphs". Studies in Mycology (44): 1–180.
  4. Chen, C; Verkley, GJ; Sun, G; Groenewald, JZ; Crous, PW (2016). "Redefining common endophytes and plant pathogens in Neofabraea, Pezicula, and related genera". Fungal Biology. 120 (11): 1291–1322. doi:10.1016/j.funbio.2015.09.013. PMID 27742091.
  5. Spotts, RA; Seifert, KA; Wallis, KM; Sugar, D; Xiao, CL; Serdani, M; Henriquez, JL (2009). "Description of Cryptosporiopsis kienholzii and species profiles of Neofabraea in major pome fruit growing districts in the Pacific Northwest USA". Mycological Research. 113 (11): 1301–1311. doi:10.1016/j.mycres.2009.08.013. PMID 19733662.
  6. Gariépy, TD; Lévesque, CA (2003). "Species specific identification of the Neofabraea pathogen complex associated with pome fruits using PCR and multiplex DNA amplification". Mycological Research. 107 (5): 528–536. doi:10.1017/S0953756203007810. PMID 12884949.
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