Investigating Wood Decaying Fungi Diversity in Central Siberia, Russia Using ITS Sequence Analysis and Interaction with Host Trees

Abstract

Wood-decay fungi (WDF) play a significant role in recycling nutrients, using enzymatic and mechanical processes to degrade wood. Designated as a biodiversity hot spot, Central Siberia is a geographically important region for understanding the spatial distribution and the evolutionary processes shaping biodiversity. There have been several studies of WDF diversity in Central Siberia, but identification of species was based on morphological characteristics, lacking detailed descriptions and molecular data. Thus, the aim of this study was to identify WDF in Central Siberia, regarding the degradation of host trees based on both morphological and molecular analyses. We collected 106 WDF samples from Krasnoyarsk and the Republic of Khakassia in 2014 and 2017, and identified a total of 52 fungal species from six main host tree genera. In order to assess the host preference of the WDF, we examined previous literature, and data from this study. We confirmed a division in host preference of WDF between gymnosperms and angiosperms. DNA-based identification and host preference assessment of the WDF provide preliminary data on WDF diversity and their role in nutrient cycles in the ecosystem of Central Siberia. To fully understand WDF diversity in Central Siberia, continuous long-term surveys, including DNA sequence data, are needed.

Diversity of Mycobiota Associated with the Cereal Cyst Nematode Heterodera filipjevi Originating from Some Localities of the Pannonian Plain in Serbia

“…Birch, poplar, and willow trees were the preferential hosts for Bjerkandera adusta, Cerrena unicolor, Phlebia spp. andTrametes hirsuta [65], the fungal species also found in this study and reported as endophytes from multiple hosts [66]. There is a lack of available nitrogen in wood and, therefore, nematophagous fungi (which showed good ability to colonize wood) satisfy their nitrogen requirements by capturing nematodes [7].…”

“…It was not unexpected that the plant parasitic fungi might occur in crops and subsequently they could be transferred to soil. In contrast, the species of the phylum Basidiomycota ( Phlebia nothofagi , Phlebiopsis ravenelii , Bjerkandera adusta , Trametes hirsuta , and Cerrena unicolor ) were reported to be associated with birch, poplar, and willow forest ecosystems [ 65 ], but their presence was surprising in agricultural soil of the Pannonian Plain. The explanation was found through the analysis of historical data.…”

Wild apple-associated fungi and bacteria compete to colonize the larval gut of an invasive wood-borer Agrilus mali in Tianshan forests

“…This indicates that plant immunity could be reduced because larvae feed on the phloem of trees by creating serpentine galleries, thus preventing nutrient movement. The transition from twig infestation to twig death thus creates the growth of saprophytic wood decaying fungi (WDF) [45,46]. Lignin is known to be extensively degraded by WDF and other fungi [45,46]; therefore, A. mali larvae gut bacteria specialized in degradation of cellulose but not lignin.…”

“…The transition from twig infestation to twig death thus creates the growth of saprophytic wood decaying fungi (WDF) [45,46]. Lignin is known to be extensively degraded by WDF and other fungi [45,46]; therefore, A. mali larvae gut bacteria specialized in degradation of cellulose but not lignin. Moreover, the lignin composition and content vary between xylem and phloem [47].…”

Taxonomic Study of the Genus Pholiota (Strophariaceae, Basidiomycota) in Korea

“…While the ectomycorrhizal species composition in Korea is very different from those of Europe and North America [ 16 , 17 ], there is little difference between saprotrophic fungi compositions between continents [ 46 , 47 ]. Correspondingly, we confirmed that the Korean Pholiota species showed little genetic difference from the European and North American Pholiota species in the ITS neighbor-joining (NJ) phylogeny ( Figure 1 ).…”