This study investigated several anatomical characteristics of Paulownia tomentosa roots. The root wood was separated into three parts from stem base (top, middle, and base) at different positions below ground. Qualitative anatomical data suggested that the growth rings in earlywood and latewood were...
This study investigated several anatomical characteristics of Paulownia tomentosa roots. The root wood was separated into three parts from stem base (top, middle, and base) at different positions below ground. Qualitative anatomical data suggested that the growth rings in earlywood and latewood were structurally different. Furthermore, the root wood vessels were found having 2 to 3 radial multiples and they were appeared in the form of clusters. In addition, some sheath cells and septate axial parenchyma were observed. Regarding the quantitative anatomical characteristics, vessel and ray numbers per $mm^2$, as well as ray width and height differed significantly among the top, middle, and base rood wood parts. However, there were no significant differences in vessel diameters, cell wall thickness, and width and length of wood fibers among those parts. The crystallinity of the root top part was slightly higher than that of the middle and base parts. Furthermore, the vessel numbers, ray numbers, and ray width and height in the near pith (NP) area were higher compared to those in the near bark (NB) area. However, the fiber width and fiber length at NP were lower than those at NB. Overall, this study demonstrated some significant differences in the anatomical characteristics of the top, middle, and base parts of root wood from Paulownia tomentosa.
This study investigated several anatomical characteristics of Paulownia tomentosa roots. The root wood was separated into three parts from stem base (top, middle, and base) at different positions below ground. Qualitative anatomical data suggested that the growth rings in earlywood and latewood were structurally different. Furthermore, the root wood vessels were found having 2 to 3 radial multiples and they were appeared in the form of clusters. In addition, some sheath cells and septate axial parenchyma were observed. Regarding the quantitative anatomical characteristics, vessel and ray numbers per $mm^2$, as well as ray width and height differed significantly among the top, middle, and base rood wood parts. However, there were no significant differences in vessel diameters, cell wall thickness, and width and length of wood fibers among those parts. The crystallinity of the root top part was slightly higher than that of the middle and base parts. Furthermore, the vessel numbers, ray numbers, and ray width and height in the near pith (NP) area were higher compared to those in the near bark (NB) area. However, the fiber width and fiber length at NP were lower than those at NB. Overall, this study demonstrated some significant differences in the anatomical characteristics of the top, middle, and base parts of root wood from Paulownia tomentosa.
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제안 방법
, 2014), we reported the anatomical and physical properties of branch wood. In this study, we examined the root wood anatomical characteristics, and compared the differences among its top, middle, and base parts.
대상 데이터
The eleven and thirteen years old Paulownia tomentosa trees were obtained from research forest (N 37°51' / E 127°48') of Kangwon national university in South Korea (Table 1).
The eleven and thirteen years old Paulownia tomentosa trees were obtained from research forest (N 37°51' / E 127°48') of Kangwon national university in South Korea (Table 1). The experimental samples for investigating anatomical properties were cut from root parts of Paulownia tomentosa trees (Fig. 1). The rooting depth of the studied root wood was approximately 2.
데이터처리
Differences in the quantitative features among the root wood top, middle, and base were statistically examined with one-way ANOVA, and post-hoc Duncan’s tests (IBM SPSS ver. 21, USA).
이론/모형
, 2001), dehydrated in a graded series of alcohol (50%, 70%, 90%, 95%, and 99%), mounted using Canada balsam, and observed under an optical microscope (Nikon Eclipse E600, Japan). The anatomical characteristics, such as number and diameter of vessels, height and width of rays, fiber length, and structure were determined according to the IAWA hardwood feature list (IAWA Committee, 1989) using Total Imaging Solution software (IMT, I-solution Lite, USA). For each characteristic, fifty random measurements were made to determine a mean value.
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