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Title: | Links Between Heathland Fungal Biomass Mineralization, Melanization, and Hydrophobicity | Authors: | Lenaers, Mathias REYNS, Wouter CZECH, Jan CARLEER, Robert BASAK, Indranil DEFERME, Wim Krupinska, Patrycja Yildiz, Talha Saro, Sherilyn REMANS, Tony VANGRONSVELD, Jaco De Laender, Frederik RINEAU, Francois |
Issue Date: | 2018 | Source: | MICROBIAL ECOLOGY, 76 (3), p. 762-770 | Abstract: | Comprehending the decomposition process is crucial for our understanding of the mechanisms of carbon (C) sequestration in soils. The decomposition of plant biomass has been extensively studied. It revealed that extrinsic biomass properties that restrict its access to decomposers influence decomposition more than intrinsic ones that are only related to its chemical structure. Fungal biomass has been much less investigated, even though it contributes to a large extent to soil organic matter, and is characterized by specific biochemical properties. In this study, we investigated the extent to which decomposition of heathland fungal biomass was affected by its hydrophobicity (extrinsic property) and melanin content (intrinsic property). We hypothesized that, as for plant biomass, hydrophobicity would have a greater impact on decomposition than melanin content. Mineralization was determined as the mineralization of soil organic carbon (SOC) into CO2 by headspace GC/MS after inoculation by a heathland soil microbial community. Results show that decomposition was not affected by hydrophobicity, but was negatively correlated with melanin content. We argue that it may indicate that either melanin content is both an intrinsic and extrinsic property, or that some soil decomposers evolved the ability to use surfactants to access to hydrophobic biomass. In the latter case, biomass hydrophobicity should not be considered as a crucial extrinsic factor. We also explored the ecology of decomposition, melanin content, and hydrophobicity, among heathland soil fungal guilds. Ascomycete black yeasts had the highest melanin content, and hyaline Basidiomycete yeasts the lowest. Hydrophobicity was an all-or-nothing trait, with most isolates being hydrophobic. | Notes: | Rineau, F (reprint author), Hasselt Univ, Res Grp Environm Biol, Ctr Environm Sci, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. francois.rineau@uhasselt.be | Keywords: | decomposition; fungal biomass; heathland; hydrophobicity; melanin | Document URI: | http://hdl.handle.net/1942/25970 | ISSN: | 0095-3628 | e-ISSN: | 1432-184X | DOI: | 10.1007/s00248-018-1167-3 | ISI #: | 000443567600018 | Rights: | (C) Springer Science+Business Media, LLC, part of Springer Nature 2018 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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MECO-D-17-00665.pdf | Peer-reviewed author version | 1.41 MB | Adobe PDF | View/Open |
s00248-018-1167-3.pdf Restricted Access | Published version | 2.75 MB | Adobe PDF | View/Open Request a copy |
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