Variations in main anatomical features of the Salix integra stem
The main anatomical features of the Salix integra stem investigated via stereological microscopic measurements will provide basic data and theoretical guidance to the other research and application of Salix integra. The proportions of fiber, vessel, and ray were 71.04%, 21.48%, and 7.48%, respectively with a non-significant radial variance. The radial width, tangential width, and frequency of the vessel were 37.41 μm, 46.02 μm, and 155.86 ·mm-2, respectively and both the radial and longitudinal variances were significant. The radial-tangential width ratio of the vessel was 1.26 and the radical variance was significant, but the longitudinal variance was not significant. The average values of fiber length, width, double-wall thickness, double-wall thickness-lumen diameter ratio, and length-width ratio were 406.80 μm, 19.530 μm, 7.66 μm, 0.64, and 21.45, respectively and all radical variances were significant, but the longitudinal variances were not significant. The fiber lumen diameter-width ratio and lumen diameter were 0.59 and 11.73 μm, respectively, but the radical variance and longitudinal variance were not significant.