scholarly journals Fenton reaction facilitates organic nitrogen acquisition by an ectomycorrhizal fungus

2018 ◽  
Vol 218 (1) ◽  
pp. 335-343 ◽  
Author(s):  
Michiel Op De Beeck ◽  
Carl Troein ◽  
Carsten Peterson ◽  
Per Persson ◽  
Anders Tunlid
Keyword(s):  
Fenton Reaction ◽  
Organic Nitrogen ◽  
Ectomycorrhizal Fungus ◽  
Nitrogen Acquisition

scholarly journals Nitrogen acquisition from mineral‐associated proteins by an ectomycorrhizal fungus

2020 ◽  
Vol 228 (2) ◽  
pp. 697-711 ◽  
Author(s):  
Tao Wang ◽  
Zhaomo Tian ◽  
Anders Tunlid ◽  
Per Persson
Keyword(s):  
Ectomycorrhizal Fungus ◽  
Nitrogen Acquisition ◽  
Associated Proteins

scholarly journals Secretion of Iron(III)-Reducing Metabolites during Protein Acquisition by the Ectomycorrhizal Fungus Paxillus involutus

2020 ◽  
Vol 9 (1) ◽  
pp. 35
Author(s):  
Firoz Shah ◽  
Markus Gressler ◽  
Susan Nehzati ◽  
Michiel Op De Beeck ◽  
Luigi Gentile ◽  
...  
Keyword(s):  
Fenton Reaction ◽  
Ectomycorrhizal Fungus ◽  
Paxillus Involutus ◽  
Environmental Cues ◽  
Rapid Reduction ◽  
Fenton Chemistry ◽  
X Ray ◽  
Solid Iron ◽  
X Ray Absorption ◽  
Step Mechanism

The ectomycorrhizal fungus Paxillus involutus decomposes proteins using a two-step mechanism, including oxidation and proteolysis. Oxidation involves the action of extracellular hydroxyl radicals (•OH) generated by the Fenton reaction. This reaction requires the presence of iron(II). Here, we monitored the speciation of extracellular iron and the secretion of iron(III)-reducing metabolites during the decomposition of proteins by P. involutus. X-ray absorption spectroscopy showed that extracellular iron was mainly present as solid iron(III) phosphates and oxides. Within 1 to 2 days, these compounds were reductively dissolved, and iron(II) complexes were formed, which remained in the medium throughout the incubation. HPLC and mass spectrometry detected five extracellular iron(III)-reducing metabolites. Four of them were also secreted when the fungus grew on a medium containing ammonium as the sole nitrogen source. NMR identified the unique iron(III)-reductant as the diarylcyclopentenone involutin. Involutin was produced from day 2, just before the elevated •OH production, preceding the oxidation of BSA. The other, not yet fully characterized iron(III)-reductants likely participate in the rapid reduction and dissolution of solid iron(III) complexes observed on day one. The production of these metabolites is induced by other environmental cues than for involutin, suggesting that they play a role beyond the Fenton chemistry associated with protein oxidation.

Significance of organic nitrogen acquisition for dominant plant species in an alpine meadow on the Tibet plateau, China

2006 ◽  
Vol 285 (1-2) ◽  
pp. 221-231 ◽  
Author(s):  
Xingliang Xu ◽  
Hua Ouyang ◽  
Yakov Kuzyakov ◽  
Andreas Richter ◽  
Wolfgang Wanek
Keyword(s):  
Plant Species ◽  
Organic Nitrogen ◽  
Alpine Meadow ◽  
Tibet Plateau ◽  
Nitrogen Acquisition ◽  
Dominant Plant Species ◽  
The Tibet Plateau

scholarly journals Inorganic and Organic Nitrogen Acquisition by a Fern Dicranopteris dichotoma in a Subtropical Forest in South China

PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e90075 ◽  
Author(s):  
Xingliang Xu ◽  
Qingkang Li ◽  
Jingyuan Wang ◽  
Leiming Zhang ◽  
Shengni Tian ◽  
...  
Keyword(s):  
South China ◽  
Organic Nitrogen ◽  
Subtropical Forest ◽  
Nitrogen Acquisition ◽  
Dicranopteris Dichotoma ◽  
Inorganic And Organic Nitrogen ◽  
Inorganic And Organic

Intraspecific variation in use of different organic nitrogen sources by the ectomycorrhizal fungus Hebeloma cylindrosporum

Mycorrhiza ◽  
2004 ◽  
Vol 15 (3) ◽  
pp. 167-177 ◽  
Author(s):  
Alice Guidot ◽  
Marie-Christine Verner ◽  
Jean-Claude Debaud ◽  
Roland Marmeisse
Keyword(s):  
Intraspecific Variation ◽  
Organic Nitrogen ◽  
Nitrogen Sources ◽  
Ectomycorrhizal Fungus ◽  
Hebeloma Cylindrosporum

scholarly journals Forest tree growth is linked to mycorrhizal fungal composition and function across Europe

2022 ◽  
Author(s):  
Mark A. Anthony ◽  
Thomas W. Crowther ◽  
Sietse van der Linde ◽  
Laura M. Suz ◽  
Martin I. Bidartondo ◽  
...  
Keyword(s):  
Tree Growth ◽  
Organic Nitrogen ◽  
Forest Tree ◽  
Inventory Data ◽  
Nitrogen Acquisition ◽  
Continental Scale ◽  
Exploration Types ◽  
Mesocosm Experiments ◽  
Tree Growth Rate ◽  
And Function

AbstractMost trees form symbioses with ectomycorrhizal fungi (EMF) which influence access to growth-limiting soil resources. Mesocosm experiments repeatedly show that EMF species differentially affect plant development, yet whether these effects ripple up to influence the growth of entire forests remains unknown. Here we tested the effects of EMF composition and functional genes relative to variation in well-known drivers of tree growth by combining paired molecular EMF surveys with high-resolution forest inventory data across 15 European countries. We show that EMF composition was linked to a three-fold difference in tree growth rate even when controlling for the primary abiotic drivers of tree growth. Fast tree growth was associated with EMF communities harboring high inorganic but low organic nitrogen acquisition gene proportions and EMF which form contact versus medium-distance fringe exploration types. These findings suggest that EMF composition is a strong bio-indicator of underlying drivers of tree growth and/or that variation of forest EMF communities causes differences in tree growth. While it may be too early to assign causality or directionality, our study is one of the first to link fine-scale variation within a key component of the forest microbiome to ecosystem functioning at a continental scale.

Sign in / Sign up

Export Citation Format

Share Document