Six New Species of Tomentella (Thelephorales, Basidiomycota) From Tropical Pine Forests in Central Vietnam

Abstract

Up to this point, studies on the taxonomy and phylogeny of the basidiomycetous genus Tomentella stemmed mainly from the temperate to boreal zones of the Northern hemisphere but were scarce in tropical Asia. In this study, six new species—T. bidoupensis, T. brevisterigmata, T. cinereobrunnea, T. longiechinula, T. stipitobasidia, and T. verruculata from central Vietnam in Southeast Asia—are described and illustrated on the basis of morphological characteristics and molecular phylogenetic analyses of the nuclear ribosomal ITS (internal transcribed spacer: ITS1-5.8S-ITS2) and LSU (large subunit: 28S) markers. Maximum likelihood and Bayesian analyses were used to confirm the phylogenetic positions of these new species and all of them can be well recognized by the macroscopical and anatomical characteristics. The new species and closely related species in the phylogenetic tree, and the new species and morphologically similar species are discussed, whereas the host plant for these new species were speculated on the basis of the phylogenetic analyses and the tree species information of the investigated forests.

Four New Species of Tomentella (Thelephorales, Basidiomycota) from Subtropical Forests in Southwestern China

“…A similar topology was obtained using ML and Bayesian analyses with one sample of Odontia ferruginea as the outgroup [65], and only the ML tree is shown in Figure 1 with the ML bootstrap values and Bayesian posterior probabilities. In the phylogenetic tree, 18 clades with moderate to strong support were marked, of which six clades (clade 2, 4, 6, 8, 10 and 16) were consistent with the previous ITS + LSU phylogenetic analyses [65].…”

Effects of Different Altitudes on Castanopsis hystrix, the Top Community-Building Species in Southern Subtropical China: Rhizospheric Soil Chemical Properties and Soil Microbiota

“…The Byssocorticium and Inocybe fungi are highly competitive in harsh environments, occupying dominant positions [48], with the former possessing saprotrophic functions, facilitating nutrient cycling in plants by decomposing forest litter [49], and the latter supplying host plants with water and mineral nutrients, playing a crucial ecological role in forest succession [50]. Species in the Tomentella genus are known to form ectomycorrhizae (ECM) with higher plants, absorbing host carbohydrates while supplying nitrogen and water, a symbiotic relationship critical for forest ecosystem succession and biodiversity maintenance [51]. In the case of Phaeocollybia, one study has suggested a root parasitic lifestyle [52], whereas recent work from Abies forests in Mexico suggested that Phaeocollybia is ECM [53].…”

Molecular phylogeny and morphology reveal four new species of Thelephora (Thelephorales, Basidiomycota) from subtropical China, closely related to T. ganbajun

“…Generally, species of Thelephora contain a variety of shapes of basidiocarps and basidiospores with tuberculate or echinulate ornamentation, which help differentiate it from other genera in Thelephoraceae. Nevertheless, molecular validations have confirmed that Thelephora and Tomentella have a very close genetic relationship on the phylogenetic tree; the two genera are usually intermixed in the same evolutionary branch and do not form separate monophyletic groups (Vizzini et al, 2016 ; Lu et al, 2022 ). Furthermore, some species of the two genera have similar microscopic characteristics, such as tuberculate or echinulate ornamentation, and the same size and form as basidiospores (Stalpers, 1993 ; Lee et al, 2010 ; Yorou et al, 2011 ; Ramírez-López et al, 2015 ).…”

“…Furthermore, some species of the two genera have similar microscopic characteristics, such as tuberculate or echinulate ornamentation, and the same size and form as basidiospores (Stalpers, 1993 ; Lee et al, 2010 ; Yorou et al, 2011 ; Ramírez-López et al, 2015 ). The subtle classification boundary of the two genera has been controversial and still remains unresolved (Ramírez-López et al, 2015 ; Li et al, 2020 ; Lu et al, 2022 ).…”

“…Recent studies have documented that the chemically active ingredients, such as p-biphenyl phenolic compounds, polysaccharides, steroids, and fatty acids, extracted from Th. ganbajun have multiple effects such as antioxidant, antitumor, liver protection, and immune system enhancement for humans (Xu et al, 2016 ; Wang et al, 2017a ; Zheng et al, 2020 ; Lu et al, 2022 ).…”