摘 要:对1年生毛白杨人工接种后,毛白杨与瘿瘤木纤维和导管分子长、宽、腔径、长宽比、壁厚与化学组成变异进行测定与分析。结果表明:纤维各解剖参数(壁厚除外)在处理组接种处明显下降,上方木质部和接种处导管变小,下方受其影响较小。方差分析表明:处理组毛白杨木质部木纤维及导管分子差异极显著;对照组木质部木纤维和导管分子无明显变化;瘿瘤之间木纤维及导管分子的长、宽均差异显著,说明瘿瘤细胞分裂异常;与木质部相比,瘿瘤中木纤维和导管分子明显减小;毛白杨木质部和瘿瘤之间木纤维及导管分子差异达显著和极显著。处理组毛白杨接种处冷水抽出物、热水抽出物、1% NaOH抽出物含量增加,纤维素含量降低,木质素含量最高。方差分析表明:处理组毛白杨化学组成变异极显著,对照组毛白杨各接种部位和瘿瘤之间化学组成均变化平稳。瘿瘤木质部中冷水抽出物、热水抽出物、1% NaOH抽出物含量分别比提高了2.6~4.3,1.5~2.6,1.1~1.8倍,而纤维素含量下降了51%~99%,处理组毛白杨接种处木质素含量是瘿瘤的2.7倍,和其他接种部位相比,瘿瘤木质素含量略高
Abstract: A determination and analysis on the variation of wood fiber and vessel element of xylem(Populus tomentosa) and burl, including length and width, lumen diameter, ratio of length to width, wall thickness, and chemical compositions on the relationship among them were conducted during development of burl after inoculation for one-year Chinese White Poplar.The results showed that: all anatomical parameters but wall thickness of wood fiber decreased at the inoculation position of treatment group, and the vessels where are above and just at the inoculation position were becoming smaller compared with other positions, whereas they, with the position that below the inoculation position, were as similar as the control one. It indicated that there were significant difference for wood fiber and vessel element of treatment group xylem by variance. On the other hand, the parameters in the control group were almost the same. There was significantly difference(5% level) of the fiber and vessel element length, width among burls, in which it suggested that cell division in vivo were abnormity. To compare with that in xylem, the wood fiber and vessel element were obviously smaller in burl. It indicated that there were significant difference for wood fiber and vessel element of Chinese White Poplar and burl by variance. The analysis on wood chemical compositions, from different positions of the treatment group, presented that cold water extractives, hot water extractives, 1% NaOH extractives and lignin increased, but the cellulose decreased to compare with the control one. It indicated that there were significant difference for chemical compositions treatment group by variance. Variation of chemical compositions was stable in control group and burl. Furthermore, the extractives saturated by three ways mentioned above in the burl increased the most, which they were 2.6~4.3 times, 1.5~2.6 times, and 1.1~1.8 times but cellulose decreased 51%~99% than that in xylem. The content of lignin at the position of inoculation of the xylem was 2.7 times higher than that in burl. Even so, the content of lignin in burl was slightly higher than that in other positions.
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