Trichoderma asiaticum

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Trichoderma asiaticum
Scientific classification
DomainEukaryota
KingdomFungi
PhylumAscomycota
ClassSordariomycetes
Subclass
OrderHypocreales
FamilyHypocreaceae
GenusTrichoderma
Species:asiaticum
Binomial name:
T. asiaticum
Z.F. Yu & X. Du, 2021
Synonyms
   No synonyms listed

Trichoderma asiaticum is a species of fungus described in 2021 by Zheng et al. It was isolated from environmental samples and characterized using morphological features and molecular phylogenetic analyses.[1] Tricoderma sp. have a wide distribution and several novel species have been described from soils in China.[2] No T. asiaticum-specific economic uses have been reported. However, species of the genus Trichoderma are widely used in agriculture as biocontrol agents and in industrial applications.

Taxonomy and genetics

Phylogenetic tree generated by maximum likelihood analysis using concatenated sequences of rpb2 and tef1 loci of the genus Trichoderma. Maximum likelihood bootstrap values ≥70% (left) and Bayesian posterior probabilities ≥0.9 (right) are indicated at nodes (MLBP/BIBP). Protocrea farinosa CBS 121551 and P. pallida CBS 299.78 were used as outgroups. Novel species proposed in Zhao et al. (2023) are indicated in bold.[2]

Taxonomy

Trichoderma asiaticum is a species of filamentous fungus in the family Hypocreaceae, order Hypocreales, within the phylum Ascomycota. It was formally described in 2021 based on morphological characteristics and molecular phylogenetic analyses using gene regions such as rpb2 and tef1.[2] The genus Trichoderma comprises numerous species commonly found in soil and plant-associated environments, with species boundaries increasingly resolved through molecular methods rather than morphology alone.[2]

Genetics

Trichoderma asiaticum is likely primarily asexual. As in other Trichoderma species, genetic variation arises through mutation and parasexual processes.

Morphology

Morphology of Trichoderma asiaticum (YMF 1.00352), showing colony growth on CMD, PDA, and SNA media (a–c) and microscopic structures including conidiophores, phialides, and conidia (d–h) (Zheng et al. 2021).[1]

Trichoderma asiaticum produces colonies that vary in appearance depending on culture medium. After 7 days at 25 °C, colonies grown on CMD, PDA, and SNA exhibit distinct growth forms and coloration.[1] Conidiophores are formed on SNA and are branched, bearing phialides that give rise to conidia. Phialides are arranged along the conidiophores and produce conidia in clusters.[1] Conidia are smooth-walled and typically globose to subglobose in shape.[1]

References

  1. 1.0 1.1 1.2 1.3 1.4 Zheng, H.; Qiao, M.; Lv, Y.; Du, X.; Zhang, K.-Q.; Yu, Z. (2021). New species of Trichoderma isolated as endophytes and saprobes from Southwest China. Journal of Fungi 7(6): 467. https://doi.org/10.3390/jof7060467.
  2. 2.0 2.1 2.2 2.3 Zhao, R.; Mao, L.-J.; Zhang, C.-L. 2023. Three new species of Trichoderma (Hypocreales, Hypocreaceae) from soils in China. MycoKeys 97:21–40. https://doi.org/10.3897/mycokeys.97.101635.

External links