RESISTANCE OF HARDWOOD VESSELS TO DEGRADATION BY WHITE ROT BASIDIOMYCETES
RESISTANCE OF HARDWOOD VESSELS TO DEGRADATION BY WHITE ROT BASIDIOMYCETES
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DOI：
10.1139/b88-251
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发表时间：
1988-09-01
期刊：
影响因子：
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通讯作者：
WELIKY, K
中科院分区：
文献类型：
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作者：
BLANCHETTE, RA;OBST, JR;WELIKY, K
白丝腐病是一种不寻常的选择性真菌腐烂类型，可以在一些双子叶被子植物的木材中发现。高级腐烂阶段由大量血管元素组成，仅残留有粘附在血管壁上的其他细胞。各种白腐担子菌的降解会导致纤维、纤维管胞和薄壁细胞的损失，但不会导致血管损失。采用相思木 (Acacia koa var.) 木材制成。具有由桑黄引起的白袋腐病的相思树，纤维和薄壁细胞优先脱木质素。大量去除木质素后，残留在次生壁中的纤维素被降解。其他细胞完全降解后，大血管元件仍保持相对完整。容器对降解的抵抗力似乎是由于它们的高木质素：碳水化合物比率、木质素单体组成和细胞壁形态。
White stringy rot, an unusual type of selective fungal decay, can be found in wood of some dicotyledonous angiosperms. Stages of advanced decay consist of a mass of vessel elements with only remnants of other cells adhering to the vessel walls. Degradation by various white rot Basidiomycetes causes loss of fibers, fiber tracheids, and parenchyma cells but not vessels. In wood of Acacia koa var. koa with a white pocket rot caused by Phellinus kawakamii, fibers and parenchyma cells were preferentially delignified. After extensive lignin removal the cellulose remaining in the secondary wall was degraded. Large vessel elements remained relatively intact after other cells were completely degraded. The resistance of vessels to degradation appears to be due to their high lignin:carbohydrate ratio, lignin monomer composition, and cell wall morphology.