White rot and manganese deposition in TnBTO-AAC preservative treated pine stakes from field tests

Daniel, Geoffrey; Bergman, O.

doi:10.1007/bf02990546

Cited by 12 publications

(6 citation statements)

References 7 publications

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“…Finally, considering that MnO 2 as well as oxalate are commonly found in soil at pH values compatible with the reaction described in this study (Pedler et al, 1996;Bromfield and Skerman, 1949;Ghiorse, 1988), the involvement of abiotic Mn complexes in ligninolysis would perhaps not be restricted to wood decay. Indeed, the lignins activated into radical species by MnO 2 / oxalate could be also involved in coupling reactions with other nucleophilic compounds formed during the degradation of organic material in soils, participating therefore directly in the more general process of humus formation (Blanchette, 1984;Daniel and Bergman, 1997;Shindo and Huang, 1982;Lovley et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

“…Although the role of enzymatically generated manganese III in the biological degradation of lignin has been extensively studied, the only species identified so far in decayed wood is Mn(IV)O 2 (Daniel and Bergman, 1997;Blanchette, 1984;Glenn and Gold, 1985;Glenn et al, 1986;Wariishi, 1991). We have recently demonstrated that the interaction between solid MnO 2 , accumulated in rotted wood and oxalic acid, a metabolite produced by wood-rotting fungi, results in the formation of Mn complexes able to oxidize lignin within poplar sawdust (Hames and Kurek, 1997).…”

Section: Introductionmentioning

confidence: 99%

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MnO₂ and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

Lequart¹,

Kurek²,

Debeire³

et al. 1998

J. Agric. Food Chem.

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Oxidants formed through the interaction between MnO2 and oxalate accumulated in rotten wood have been evaluated as abiotic agents possibly involved in wheat straw ligninolysis. The hemicellulose and cellulose content of straw remained unchanged, and no release of free soluble materials from lignin or polysaccharides could be evidenced. Structural analysis of oxidized lignin in situ has revealed up to 30% and 10% decrease of β-O-4 linked Guaiacyl and Syringyl units, respectively. Lignin phenolic moieties only were directly oxidized by MnO2/oxalate as no structural alteration was observed within extensively permethylated wheat straw. Modifications were also evidenced at the level of the cell wall linked cinnamic acids present in wheat straw. Esterified phenolic acids were more readily oxidized by Mn complexes than ethers analogues, and disappearance of ferulic moieties was always more pronounced than that of p-coumaric acids. The abiotic Mn oxidants generated from MnO2 and oxalate may therefore significantly contribute to the decay and humification process of lignocellulosic material in Nature. Keywords: Manganese dioxide; oxalate; abiotic oxidation; wheat straw; lignin; cinnamic acid; hemicellulose; cellulose

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MnO₂ and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

Lequart¹,

Kurek²,

Debeire³

et al. 1998

J. Agric. Food Chem.

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“…High-valence manganese species such as MnO 2 have also been observed in connection with many examples of fungal white-rot degradation. Indeed, the insoluble manganese(IV) species is deposited at the tip of new fungal hyphae in the early stages of infestation and growth (Blanchette, 1995;Daniel and Bergman, 1997), and black MnO 2 deposits are frequently observed on fibers in severely delignified wood (Blanchette, 1984(Blanchette, , 1991. However, the role of manganese(IV) as MnO 2 species in the white-rot degradation and the reasons for its accumulation in extensively delignified wood remain unknown (Roy et al, 1994;Jellison et al, 1997;Shimada et al, 1989Shimada et al, , 1994.…”

Section: Introductionmentioning

confidence: 99%

Interaction between MnO₂ and Oxalate: Formation of a Natural and Abiotic Lignin Oxidizing System

Hames

Kurek

Pollet

et al. 1998

J. Agric. Food Chem.

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This paper reports for the first time the efficient modification/degradation of in situ lignin by manganese complexes formed by the association of MnO 2 , accumulated as black deposits during wood decay, and oxalic acid, produced by fungi or resulting from oxidative degradation of cell wall components. The Mn oxidants formed are shown to modify both the chemical and physical properties of the wood cell wall. Microscopic analysis revealed the disruption of ray cell in oxidized wood and the formation of amorphous globular material not yet characterized. Thioacidolysis analysis of the oxidized lignin showed a reduction up to 25-30% in the recovery of ether-linked guaiacyl (G) and syringyl monomers and up to 50-80% of several diarylpropane and phenylcoumarane dimers composing the polymer. Preferential oxidation of G moieties in all structures examined was observed during catalysis. The MnO 2 /oxalate system also appears to selectively oxidize the lignin macromolecule, as no xylose or glucose loss was observed in all treated samples. The oxidation process catalyzed by MnO 2 and oxalate may play an important role in the general pathway of lignin degradation and also in the transformation of the lignin polymer into humus and/or its precursors.

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“…11 used chrome azurol and inductively coupled plasma analysis to measure increased metal cations in decaying wood by various brown and white rot fungi and found increased Fe and possibly Al in brown rotted wood. Further, Daniel, Blanchette and others were able to localize manganese in white rotted wood, presumably associated with white rot enzymatic attack 19 20 21 .…”

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confidence: 97%

Synchrotron-based X-ray fluorescence microscopy enables multiscale spatial visualization of ions involved in fungal lignocellulose deconstruction

Kirker

Zelinka

Gleber

et al. 2017

Sci Rep

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The role of ions in the fungal decay process of lignocellulose biomaterials, and more broadly fungal metabolism, has implications for diverse research disciplines ranging from plant pathology and forest ecology, to carbon sequestration. Despite the importance of ions in fungal decay mechanisms, the spatial distribution and quantification of ions in lignocellulosic cell walls and fungal hyphae during decay is not known. Here we employ synchrotron-based X-ray fluorescence microscopy (XFM) to map and quantify physiologically relevant ions, such as K, Ca, Mn, Fe, and Zn, in wood being decayed by the model brown rot fungus Serpula lacrymans. Two-dimensional XFM maps were obtained to study the ion spatial distributions from mm to submicron length scales in wood, fungal hyphae with the dried extracellular matrix (ECM) from the fungus, and Ca oxalate crystals. Three-dimensional ion volume reconstructions were also acquired of wood cell walls and hyphae with ECM. Results show that the fungus actively transports some ions, such as Fe, into the wood and controls the distribution of ions at both the bulk wood and cell wall length scales. These measurements provide new insights into the movement of ions during decay and illustrate how synchrotron-based XFM is uniquely suited study these ions.

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White rot and manganese deposition in TnBTO-AAC preservative treated pine stakes from field tests

Cited by 12 publications

References 7 publications

MnO₂ and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

MnO₂ and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

Interaction between MnO₂ and Oxalate: Formation of a Natural and Abiotic Lignin Oxidizing System

Synchrotron-based X-ray fluorescence microscopy enables multiscale spatial visualization of ions involved in fungal lignocellulose deconstruction

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White rot and manganese deposition in TnBTO-AAC preservative treated pine stakes from field tests

Cited by 12 publications

References 7 publications

MnO2 and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

MnO2 and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

Interaction between MnO2 and Oxalate: Formation of a Natural and Abiotic Lignin Oxidizing System

Synchrotron-based X-ray fluorescence microscopy enables multiscale spatial visualization of ions involved in fungal lignocellulose deconstruction

Contact Info

Product

Resources

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MnO₂ and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

MnO₂ and Oxalate: An Abiotic Route for the Oxidation of Aromatic Components in Wheat Straw

Interaction between MnO₂ and Oxalate: Formation of a Natural and Abiotic Lignin Oxidizing System