New species of Tulasnella associated with Australian terrestrial orchids in the subtribes Megastylidinae and Thelymitrinae

Arifin Arild R.; Reiter Noushka H.; May Tom W.Linde Celeste C.

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New species of Tulasnella associated with Australian terrestrial orchids in the subtribes Megastylidinae and Thelymitrinae

机译：New species of Tulasnella associated with Australian terrestrial orchids in the subtribes Megastylidinae and Thelymitrinae

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Tulasnella (Tulasnellaceae) is a genus of fungus that can form mycorrhizal associations with orchids (Orchidaceae). Here we used molecular phylogenetic analyses and morphological characteristics of pure cultures across four different media to support the description of five new Tulasnella species associated with commonly occurring and endangered Australian orchids. Tulasnella nerrigaensis associates with Calochilus; T. subasymmetrica and T. kiataensis with Thelymitra; and T. korungensis and T. multinucleata with Pyrorchis and Rimacola respectively. The newly described species were primarily delimited by analyses of five loci: nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS), C14436 (adenosine triphosphate [ATP] synthase), C4102 (glutamate synthase), C3304 (ATP helicase), and mt large subunit 16S rDNA (mtLSU). Tulasnella subasymmetrica is introduced for some isolates previously identified as T. asymmetrica, and this latter species is characterized from multilocus sequencing of a new isolate that matches ITS sequences from the ex-type culture. Morphological differences between the new species are slight. Tulasnella multinucleata has 6-12 nuclei per hyphal compartment which is the first instance of multinucleate rather than binucleate or trinucleate hyphal compartments in Tulasnella. The formal description of these species of Tulasnella will aid in future evolutionary and ecological studies of orchid-fungal interactions.

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《Mycologia》 |2022年第2期|388-412|共25页
作者
Arifin Arild R.; Reiter Noushka H.; May Tom W.Linde Celeste C.;
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作者单位

Australian Natl Univ;

Royal Bot Gardens Victoria;

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正文语种英语
中图分类侵（传）染性病害;
关键词
Binucleate; Cantharellales; morphology; multinucleate; orchid mycorrhizal fungi; taxonomy; Tulasnellaceae; 5 new taxa; MYCORRHIZAL FUNGI; PERFECT STATES; BASIDIOMYCOTA; CANTHARELLALES; DEVON; IDENTIFICATION; GERMINATION; DIVERSITY; SEQUENCES; ALGORITHM;

New species of Tulasnella associated with Australian terrestrial orchids in the subtribes Megastylidinae and Thelymitrinae

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