ABSTRACT

Even though oriental spruce (Picea orientalis L.), a common species in the East Black Sea Region of Turkey, is used in a wide range of applications, its wood has low permeability. This study investigated the degradation effects of the bioincising process to improve its treatability with wood preservatives on the microstructure of oriental spruce wood. Test samples were previously subjected to bioincising by Physisporinus vitreus fungus, and the bioincised samples were examined under both a light microscope and scanning electron microscope to observe the effects of the bioincising on the anatomical properties. Bordered pits on the longitudinal tracheid radial walls, piceoid-type cross-field pits, ray tracheid bordered pits, and ray tracheid cell walls in the earlywood and latewood regions within a growth ring were particularly subjected to anatomical evaluations. In the study, the degradation intensity in the samples after the bioincising was well correlated with the weight losses occurred. Splits and factures were determined on the tori of bordered pits on the tracheid cell walls while tears and cracks were present on the pit apertures. The results also show that P. vitreus, a Type I and II white rot fungus, may cause a Type I soft rot.

摘要

尽管东方云杉 ( Picea orientalis L.) 是土耳其东黑海地区的一种常见树种，其应用范围很广，但其木材的渗透性较低。本研究调查了生物切割工艺对东方云杉木材微观结构的降解效果，以提高木材防腐剂的可处理性。测试样品之前已经过Physisporinus vitreus的生物切割真菌，并在光学显微镜和扫描电子显微镜下检查生物切割样品，以观察生物切割对解剖学特性的影响。纵向管胞径向壁上的镶边凹坑、piceoid 型交叉田间凹坑、射线管胞镶边凹坑以及生长轮内早材和晚材区域的射线管胞细胞壁特别受到解剖学评估。在该研究中，生物切割后样品的降解强度与发生的重量损失密切相关。在管胞细胞壁上的有界凹坑的花托上确定了裂口和断裂，而撕裂和裂缝则存在于凹坑孔径上。结果还表明，P. vitreus，一种 I 型和 II 型白腐真菌，可能导致 I 型软腐病。