Fungal community of Dendrobium fimbriatum (Orchidaceae): Selection of the most probable interacting fungi and their molecular compositions

To increase our knowledge on the fungal community associated to Dendrobium fimbriatum (Orchidaceae), fungi were isolated from apparently healthy adult plants, and their ability to produce different metabolites (phytohormones, siderophores) and hydrolytic enzymes, as well as their anti-phytopathogenic activity, were evaluated ex situ.

A total of 25 cultivable fungal species were isolated and identified based on their ITS sequence by a sequence similarity search in GenBank. They belong predominantly to Fusarium, Trichoderma, Colletotrichum, Curvularia and Didymella genera. Among them, 3 fungi, initially isolated from the roots, Fusarium sp., Trichoderma yunnanense, and Curvularia sp., showed a high potential to act on plant growth and plant defense [1].

Their chemical profiles investigated by LC-MS/MS analysis and represented by molecular networking, highlighted the distinctiveness of Trichoderma yunnanense metabolites. Major constituents of the fungal extracts were putatively identified as harzianic acid, fusaric acid and their derivatives, and 2,4,6-octatrienoic acid

Publikationsverlauf

Artikel online veröffentlicht:
13. Dezember 2021

• References

• 1 Favre-godal Q. et al. Symbiosis 2021, submitted This research was financially supported by Guerlain to contribute in the understanding and preservation of orchids.