Anatomical Characteristics of Paulownia tomentosa Root Wood

Abstract

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.

Solid Bioenergy Properties of Paulownia tomentosa Grown in Korea

“…Some previous studies (Demirbas, 2003;Qi et al, 2016) suggested that lignin content of biomass materials had a highly significant correlation with FCC, which the high- …”

“…Paulownia tomentosa trees of the eleven and thirteen years old were obtained from research (Qi et al, 2016). The basic information of samples is shown in Table 1.…”

“…The difference in heating value among different parts may be depending on the ash content of biomass fuel. In our previous study, the higher heating value was observed in the compression wood (CW) with lower ash content, while that of tension wood (TW) with higher ash content showed lower heating value than CW (Qi et al, 2016). Kataki and Konwer (2001) examined that the heating value of raw wood and the ash-free modified wood.…”

“…On the study of solid bioenergy properties, we could not find the references on bioenergy properties of Paulownia tree, except our precious report (Qi et al, 2016). The objective of this study, therefore, is to evaluate the solid bioenergy properties as heating value, pH, proximate analysis for whole tree utilization of P. tomentosa, and compare them in stem, branch, root, bark and leaf.…”

Comparison of the Mercury Intrusion Porosimerty, Capillary Flow Porometry and Gas Permeability of Eleven Species of Korean Wood

“…On the other hand, in case of domestic wood, there are many studies on the anatomical features of wood using microscope. (Lee et al, 2008;Lee et al, 2009Qi et al, 2016;Jeon et al, 2018) However, there are few cases of studies on the pore characteristics of domestic wood using CFP or MIP.…”