Discoloration and surface deterioration of wood and over-laid wood-based materials by sap-staining fung

汁液真菌引起的木材和覆盖木质材料的变色和表面劣化

• 批准号: 08660204
• 负责人: TAKAHASHI Munezoh
• 金额: $ 1.41万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08660204/
• 关键词: Sap-stain fungi; Blue-stain fungi; Melanin; Aliphatic structure; Jezo spruce; Hot-water extracts; Ethanol; benzene extracts

The pigments responsible for the dark blue stain of wood were isolated from liquid shake cultures of two species of blue-stain fungi, Aureobasidium pullulans and Ceratocystis piceae. Elemental and spectroscopic analyzes revealed that the coloring components were melanins and were associated with carbohydrates and proteins.The fungal melanins are highly condensed polymers of predominantly aliphatic structure whereas the synthetic tyrosin melanin contains a high number of aromatic groups.Test specimens from sapwood and heartwood of jezo spruce (Picea jezoensis) were extracted with hot water or ethanol/benzene and exposed to the test fungi. Ethanol/benzene-extracted specimens were still stained by both fungi, but hot water-extracted ones were less stained. The results suggest the possible involvement of hot water-extracts in fungal melanin production.The effect of hot water treatment should be further studied in larger scale to control fungal stain of wood and wood-based composites.

造成木材深蓝色染色的颜料是从两种蓝色染色真菌（出芽短梗霉和云杉毛囊菌）的液体摇培养物中分离出来的。元素和光谱分析表明，着色成分是黑色素，与碳水化合物和蛋白质有关。真菌黑色素是主要为脂肪族结构的高度缩合聚合物，而合成的酪氨酸黑色素含有大量芳香族基团。从杰佐云杉（Picea jezoensis）的边材和心材中提取测试样本 用热水或乙醇/苯并暴露于测试真菌。乙醇/苯提取的标本仍然被两种真菌染色，但热水提取的标本染色较少。结果表明热水提取物可能参与真菌黑色素的产生。应进一步大规模研究热水处理的效果，以控制木材和木基复合材料的真菌染色。

项目成果

MORI,M.: "Characteristics of the pigments produced by Sap-staining Fungi" The International Research Group on wood preservation, Document. No : IRG/WP 97-10203. 1-8 (1997)

MORI,M.：“汁液染色真菌产生的颜料的特性”国际木材防腐研究小组，文件。

MORI,M.: "Characteristics of the Pigments Produced by Sap-staining Fungi" The International Research Group on Wood Prezervation,Documents. IRG/WP97-10203. 1-8 (1997)

MORI,M.：“汁液染色真菌产生的颜料的特性”国际木材防腐研究小组，文件。

MORI, M.: "Characteristics of the Pigments Produced by Sap-staining Fungi" The International Research,Group on Wood Preservation,Document. IRG/WP97-10203. 1-8 (1997)

MORI, M.：“汁液染色真菌产生的颜料的特性”国际木材保护研究小组，文件。