Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales

Korotkin, Hailee Brynn; Swenie, Rachel A.; Miettinen, Otto; Budke, Jessica M.; Chen, Ko‐Hsuan; Lutzoni, François; Smith, Matthew E.; Matheny, P. Brandon

doi:10.1002/ajb2.1183

Cited by 28 publications

(25 citation statements)

References 82 publications

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“…Redhead [41] visualized peg-like haustoria at day 14, and by one month, he noted infection of cells of the protonema, rhizoids, and prothallus, in addition to hyphae growing through dead cells [41]. Further evidence of biotrophic interactions between fungi and bryophytes were completed by Korotkin et al [44]. They found stable isotopic evidence providing direct evidence for numerous biotrophic interactions between fungi in the order Hymenochaetales and bryophytes.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Observations of the Interactions between Pholiota carbonaria and Polytrichum commune and Its Potential Environmental Relevance

Raudabaugh

Wells

Matheny

et al. 2021

Life

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Wildfires play a critical role in maintaining biodiversity and shaping ecosystem structure in fire-prone regions, and successional patterns involving numerous plant and fungal species in post-fire events have been elucidated. Evidence is growing to support the idea that some post-fire fungi can form endophytic/endolichenic relationships with plants and lichens. However, no direct observations of fire-associated fungal–moss interactions have been visualized to date. Therefore, physical interactions between a post-fire fungus, Pholiota carbonaria, and a moss, Polytrichum commune, were visually examined under laboratory conditions. Fungal appressoria were visualized on germinating spores and living protonemata within two weeks of inoculation in most growth chambers. Appressoria were pigmented, reddish gold to braun, and with a penetration peg. Pigmented, reddish gold to braun fungal hyphae were associated with living tissue, and numerous mature rhizoids contained fungal hyphae at six months. Inter-rhizoidal hyphae were pigmented and reddish gold to braun, but no structures were visualized on mature gametophyte leaf or stem tissues. Based on our visual evidence and previous work, we provide additional support for P. carbonaria having multiple strategies in how it obtains nutrients from the environment, and provide the first visual documentation of these structures in vitro.

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Section: Discussionmentioning

confidence: 99%

In Vitro Observations of the Interactions between Pholiota carbonaria and Polytrichum commune and Its Potential Environmental Relevance

Raudabaugh

Wells

Matheny

et al. 2021

Life

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“…The unique biodegradation process of organic polymers in endophytic fungi often requires the assistance of redox system enzymes, such as lytic polysaccharide monooxygenases, ligninolytic peroxidases, laccase, and other enzymes produced by endophytic fungi, cellulose, and lignin as a major component of cell wall aging, which can be transformed into nutrients of endophytic fungi (Mathe et al 2019 ). For example, Rickenella mellea JGI 334,780 from Alloclavaria purpurea can transform lignin, cellulose, hemicellulose, and lignin-like polymers in plant aging cell walls into their nutrients or help plant to dispose garbage (Korotkin et al 2018 ). Endophytic fungi can produce endo-1,4-β-xylanase, xylan α-glucuronidase, acetylxylan esterase, and xylan acetylsterase to degrade xylan, while chitin can be degraded into nutrients by chitinase, polysaccharide lyase, and N -acetylglucosaminidase, all enzymes that can be produced by various endophytic fungi (Aranda-Martinez et al 2016 ).…”

Section: Research Progress On the Biodegradation Activity Of Endophytic Fungimentioning

confidence: 99%

Biotransformation ability of endophytic fungi: from species evolution to industrial applications

Liu

Zhou

Cui

et al. 2021

Appl Microbiol Biotechnol

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Increased understanding of the interactions between endophytic fungi and plants has led to the discovery of a new generation of chemical compounds and processes between endophytic fungi and plants. Due to the long-term co-evolution between fungal endophytes and host plants, endophytes have evolved special biotransformation abilities, which can have critical consequences on plant metabolic processes and their composition. Biotransformation or bioconversion can impact the synthesis and decomposition of hormones, sugars, amino acids, vitamins, lipids, proteins, and various secondary metabolites, including flavonoids, polysaccharides, and terpenes. Endophytic fungi produce enzymes and various bioactive secondary metabolites with industrial value and can degrade or sequester inorganic and organic small molecules and macromolecules (e.g., toxins, pollutants, heavy metals). These fungi also have the ability to cause highly selective catalytic conversion of high-value compounds in an environmentally friendly manner, which can be important for the production/innovation of bioactive molecules, food and nutrition, agriculture, and environment. This work mainly summarized recent research progress in this field, providing a reference for further research and application of fungal endophytes. Key points •The industrial value of degradation of endophytes was summarized. • The commercial value for the pharmaceutical industry is reviewed. Graphical abstract

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“…Rickenella fibula HBK330-10 v1.0 [280]; Rickenella mellea v1.0 (SZMC22713; [281]; Rigidoporus microporus ED310 v1.0 [282]; Rozella allomycis CSF55 [283]; Saccharomyces arboricola H-6 […”

Section: Search For Msr Homologs In Fungiunclassified

Distribution of methionine sulfoxide reductases in fungi and conservation of the free-methionine-R-sulfoxide reductase in multicellular eukaryotes

Hage

Rosso

Tarrago

2021

Preprint

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Methionine, either as a free amino acid or included in proteins, can be oxidized into methionine sulfoxide (MetO), which exists as R and S diastereomers. Almost all characterized organisms possess thiol-oxidoreductases named methionine sulfoxide reductase (Msr) enzymes to reduce MetO back to Met. MsrA and MsrB reduce the S and R diastereomers of MetO, respectively, with strict stereospecificity and are found in almost all organisms. Another type of thiol-oxidoreductase, the free-methionine-R-sulfoxide reductase (fRMsr), identified so far in prokaryotes and a few unicellular eukaryotes, reduces the R MetO diastereomer of the free amino acid. Moreover, some bacteria possess molybdenum-containing enzymes that reduce MetO, either in the free or protein-bound forms. All these Msrs play important roles in the protection of organisms against oxidative stress. Fungi are heterotrophic eukaryotes that colonize all niches on Earth and play fundamental functions, in organic matter recycling, as symbionts, or as pathogens of numerous organisms. However, our knowledge on fungal Msrs is still limited. Here, we performed a survey of msr genes in almost 700 genomes across the fungal kingdom. We show that most fungi possess one gene coding for each type of methionine sulfoxide reductase: MsrA, MsrB, and fRMsr. However, several fungi living in anaerobic environments or as obligate intracellular parasites were devoid of msr genes. Sequence inspection and phylogenetic analyses allowed us to identify non-canonical sequences with potentially novel enzymatic properties. Finaly, we identified several ocurences of msr horizontal gene transfer from bacteria to fungi.

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Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales

Cited by 28 publications

References 82 publications

In Vitro Observations of the Interactions between Pholiota carbonaria and Polytrichum commune and Its Potential Environmental Relevance

In Vitro Observations of the Interactions between Pholiota carbonaria and Polytrichum commune and Its Potential Environmental Relevance

Biotransformation ability of endophytic fungi: from species evolution to industrial applications

Distribution of methionine sulfoxide reductases in fungi and conservation of the free-methionine-R-sulfoxide reductase in multicellular eukaryotes

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