Transverse shape analysis of xylem ground tissues by the Fourier transform image analysis, 3: Shape reconstruction of earlywood tracheids in 22 species and some parameters for normalizing cell shapes
2005
Midorikawa, Y.(Kyoto Univ. (Japan)) | Fujita, M.
Tracheid arrangements and shapes on transverse sections were reconstructed by use of Fourier transform image analysis in five families, fifteen genera, and twenty-two species of softwoods. Each maximum tangential diameter of the reconstructed models was equal to the respective average value of Feret's tangential diameter measured by ordinary accumulated image analysis. By that result, the models properness was confirmed. The distance between radial files could be regarded as the standard size peculiar to each species. A standard size model was made, in which both radial and tangential lengths were equal to the standard size. At the same time a standard hexagonal model that had minimum periphery was formed. A reconstructed model was normalized by the difference from the standard hexagonal model. The radial enlargement and the invasion ratio in tangential direction were calculated by normalization. The length ratio of radial walls to tangential walls was calculated from the reconstructed models. The former was about 1.4 times as large as the latter on average. The alternate ratio that expresses cell arrangement between radial files showed that almost all species had imperfectly alternative arrangements. Characteristics of each species could be analyzed quantitatively by use of these parameters.
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