Magnaporthales » Magnaporthaceae

Nakataea

Nakataea Hara, Diseases Rice Plant, Edn 2: 185 (1939)

Diaporthomycetidae, Magnaporthales, Magnaporthaceae, Nakataea

Index Fungorum number: IF 9075; Facesoffungi number: FoF 01102; 6 morphological species (Species Fungorum 2020); 1 species with sequence data.

 

Saprobic or pathogenic on plants. Sexual morph: Ascomata dark brown, perithecial, globose, immersed, with ostiolar neck frequently swelling from the leaf tissue. Peridium thick-walled, comprising 5–12 layers, with dark cells. Asci 8-spored, unitunicate, thin-walled, subcylindrical, short pedicellate, deliquescent at maturity. Ascospores hyaline at middle cells, turning yellowish brown, spirally to parallel twisted, fusiform, curved, 3-septate, slightly bound at septa, granular. Asexual morph: Conidiophores brown, solitary, erect, smooth, septate, and branched, with integrated terminal. Conidiogenous cells forming a rachis with several denticles. Conidia middle cells medium brown, end cells hyaline, solitary, 3-septate, falcate to sigmoid, smooth-walled, and wider in the middle (adapted from Maharachchikumbura et al. 2016).

 

Type species: Nakataea sigmoidea (Cavara) Hara, Diseases Rice Plant, Edn 2: 185 (1939)

 

Notes: Nakataea causes stem rot of rice (Ou 1985). The genus was introduced based on N. oryzae (= N. sigmoidea) from Oryza sativa in Italy. Krause & Webster (1972) showed Nakataea and Magnaporthe are congeneric with their type species, N. oryzae and M. salvinii belonging to the same species. Therefore, Luo & Zhang (2013) synonymized M. oryzae under N. oryzae based on the name Nakataea (1939), which is older than Magnaporthe (1972) This resulted in Nakataea becoming the correct name for the type of the family (Murata et al. 2014, Klaubauf et al. 2014, Luo et al. 2015, Maharachchikumbura et al. 2015, 2016). Khemmuk et al. (2016) confirmed the two genera as congeneric, based on phylogenetic analysis of multi-genes (ITS, LSU, tef1, rpb1).Only Nakataea oryzae has molecular data available.

 

 

Species illustrated in this entry:

Nakataea oryzae (Catt.) J. Luo & N. Zhang

 

 

References:

Khemmuk W, Geering AD, Shivas RG. 2016 – Wongia gen. nov. (Papulosaceae, Sordariomycetes), a new generic name for two root-infecting fungi from Australia. IMA fungus 7, 247–252

Klaubauf S, Tharreau D, Fournier E, Groenewald JZ et al. 2014 – Resolving the polyphyletic nature of Pyricularia (Pyriculariaceae). Studies in Mycology 79, 85–120

Krause RA, Webster RK. 1972 – Thermorphology, taxonomy, and sexuality of the rice stem fungus, Magnaporthe salvinii (Leptosphaeria salvinii). Mycologia 64, 103–114

Luo J, Zhang N. 2013 – Magnaporthiopsis, a new genus in Magnaporthaceae (Ascomycota). Mycologia 105, 1019–1029

Luo ZL, Maharachchikumbura SSN, Liu XY, Chen LJ et al. 2015 – Annulatascus saprophyticus sp. nov. and Pseudoannulatascus gen. nov. to accommodate Annulatascus biatriisporus (Annulatascales, Sordariomycetes) from Thailand. Phytotaxa 239, 174–182

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2016 – Families of Sordariomycetes. Fungal Diversity 79, 1–317

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2015 – Towards a natural classification and backbone tree for Sordariomycetes. Fungal Diversity 72, 199–301

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2016 – Families of Sordariomycetes. Fungal Diversity 79, 1–317

Murata N, Aoki T, Kusaba M, Tosa Y, Chuma I. 2014 – Various species of Pyricularia constitute a robust clade distinct from Magnaporthe salvinii and its relatives in Magnaporthaceae. Journal of General Plant Pathology 80, 66–72

Ou SH. 1985 – Rice diseases. CAB International, Wallingford, UK

 

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