Phytophthora celebensis

Name and publication

Phytophthora celebensis T. Jung, M. Junaid, N. Nasri & I. Milenković (2022)

Jung T, Milenković I, Corcobado T. et al. 2022. Extensive morphological and behavioural diversity among fourteen new and seven described species in Phytophthora Clade 10 and its evolutionary implications. Persoonia-Molecular Phylogeny and Evolution of Fungi 49: 1–57.

Nomenclature

Mycobank

MB 843002

Etymology

Name refers to the origin of all known isolates in Sulawesi (Celebes is a previous name of Sulawesi).

Typification

Type: Indonesia, South Sulawesi Province, District of Tana Toraja, isolated from a naturally fallen leaf floating in a stream running through a submontane tropical rainforest, May 2019, T. Jung, M. Junaid & N. Nasri, holotype HNHM-MYC-021540, dried culture on V8A, Herbarium of the Hungarian Natural History Museum, Budapest

Ex-type: culture CBS 148800 = SL092

Sequences for ex-type in original manuscript:  LSU ON000626, ITS ON000720, β-tubulin OM975899, hsp90 OM976416, tigA OM974594, rpl10 OM974453, tef-1a OM984880, enolase OM976512, cox1 ON013786, ypt1 ON024938, nadh1 OM976896, rps10 OM976654

Molecular identification

Position in ITS phylogenetic tree

Clade 10a

Morphological identification

Colonies and cardinal temperatures

Colony morphology appressed with a dendroid growth pattern on V8A and CA, and dense-woolly and uniform on PDA. Optimum growth temperature 25°C and maximum 27.5°C.

Conditions for growth and sporulation

Sporangia produced in non-sterile soil extract after 1–2d. Oogonia produced readily in single culture on V8A after 2–3 weeks.

Asexual phase

Sporangia were papillate, caducous, and predominantly ovoid to broad ovoid and limoniform in shape. Sporangia averaged 38.7 x 26.2 µm (overall range 26.3–64.3 x 17.6–40.7 µm), external proliferation. Sporangiophores dense sympodia. Hyphal swellings absent. Chlamydospores absent.

Sexual phase

Homothallic. Oogonia smooth-walled, 16–43 µm;. Oospores predominantly plerotic, size ranged 14–39 µm. Antheridia amphigynous.

Most typical characters

Resides in phylogenetic clade 10a and is closely related to P. multiglobulosa and P. javanensis. These species have similar morphology and have to date been recovered only from Indonesia.

Additional specimen(s) evaluated

Indonesia, South Sulawesi Province, District of Tana Toraja, isolated from naturally fallen leaves floating in a stream running through a submontane tropical rainforest, May 2019, T. Jung, M. Junaid & N. Nasri, SL091, SL540, SL541, SL542.

Hosts and distribution

Distribution: Indonesia
Substrate: fallen leaves in forest stream
Disease note: no known disease
Host: no known host

Additional references and links

none available

Fact sheet author

Treena Burgess, Ph.D., Phytophthora Science and Management, Harry Butler Institute, Murdoch University