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[ subject:"Wood sciences." ]
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Fungal Pigment Formation in Wood Sub...
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Tudor, Daniela.
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Fungal Pigment Formation in Wood Substrate.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Fungal Pigment Formation in Wood Substrate./
作者:
Tudor, Daniela.
面頁冊數:
208 p.
附註:
Source: Dissertation Abstracts International, Volume: 76-04(E), Section: B.
Contained By:
Dissertation Abstracts International76-04B(E).
標題:
Forestry. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3668870
ISBN:
9781321442045
Fungal Pigment Formation in Wood Substrate.
Tudor, Daniela.
Fungal Pigment Formation in Wood Substrate.
- 208 p.
Source: Dissertation Abstracts International, Volume: 76-04(E), Section: B.
Thesis (Ph.D.)--University of Toronto (Canada), 2013.
This item must not be sold to any third party vendors.
A number of fungi produce spalted wood, which is characterized by accumulation of black pigment in fine demarcation lines, often accompanied by discoloration or staining on the wood fibers. Specific spalting fungi were identified by molecular analysis. From a total of 19 isolates and 140 clones studied, 11 fungal species were identified. The two Chlorociboria species from North America were investigated and their anamorphs were unambiguously identified for the first time.
ISBN: 9781321442045Subjects--Topical Terms:
895157
Forestry.
Fungal Pigment Formation in Wood Substrate.
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Source: Dissertation Abstracts International, Volume: 76-04(E), Section: B.
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Advisers: Paul Cooper; Sally Krigstin.
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Thesis (Ph.D.)--University of Toronto (Canada), 2013.
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A number of fungi produce spalted wood, which is characterized by accumulation of black pigment in fine demarcation lines, often accompanied by discoloration or staining on the wood fibers. Specific spalting fungi were identified by molecular analysis. From a total of 19 isolates and 140 clones studied, 11 fungal species were identified. The two Chlorociboria species from North America were investigated and their anamorphs were unambiguously identified for the first time.
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Fungal pigment formation under the influence of moisture content and pH variation was investigated in sugar maple, American beech and agar inoculated with spalting fungi. Maximum pigment production occurred at treatment with pH 4.5 for sugar maple and beech inoculated with Trametes versicolor . Xylaria polymorpha produced external pigmentation in beech treated with buffer at pH 5 and sugar maple at pH 4.5. Fungal pigmentation by Trametes versicolor and Xylaria polymorpha was stimulated at low moisture content in both wood species tested. Melanin production by Inonotus hispidus and Polyporus squamosus was stimulated above 22--28% and 34--38% moisture content in beech and in sugar maple respectively. Fomes fomentarius and Polyporus brumalis produced maximum pigmentation in beech at 26--41% and in sugar maple at 59--96% moisture content. The variation of the moisture content and pH values of wood substrates can stimulate the intensity of pigmentation of specific fungi in wood.
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To investigate melanin synthesis from a variety of melanin precursors, experimental research on three spalting fungi tested their reaction to catechol and L-Dopa melanin precursors in wood and agar substrate. The results indicate multiple biosynthesis pathways for melanin assembly in Trametes versicolor, Xylaria polymorha and Inonotus hispidus, and catechol produced most pigmentation in all spalting fungi investigated.
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Microscopic analysis by light, fluorescence, electron and confocal microscopy also indicates a bi- or multi-modal activity of melanin production and assembly by several spalting fungi. Possible variations of melanin assembly were identified based on fungal and wood species. Immunofluorescence and immunogold labelling with Mab 6D2 melanin antibody confirmed the melanin nature of the pigments produced by Oxyporus populinus, Trametes versicolor , Xylaria polymorpha, Fomes fomentarius , and Inonotus hispidus.
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