四倍性タイワンギリの外部形態と木繊維

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R. Kanezawa, H. Nabeshima and A. Ando : On the Morphological changes and wood fibers of tetraploid Paulownia Kawakami T.T. Co.Writers confirmed the somatic doubling of tree-tops by the cytologecal studies on the young leaves of tetraploid Paulownia Kawakami T. Ito, which were induced by colchicine treatments in the spring of 1942,and determined the chromosome numbers 2n=40 for the diploid and 2n=80 for the tetraploid. On the tetraploid, the thickness of leaves shows an increase of 2.5%, major and minor axes of stomata increase by 13.7% and 8.8% respectively, but stomatal counts decrease by 3% per 1 mm^2. These changes are not very remarkable characteristics as polyploids, but hairs increase by 39.9% in lenghth and 20.7% in thickness. Forest-trees have great quantitative variations, so it is illogical to compare morphological changes and leave this fact out of account in different individuals.According to the somatic doubling, wood fibres increase about 30% in length and above 40% in thickness, but it is impossible to say of the growth of a tetraploid tree without future studies of it.
一般社団法人日本森林学会の論文
1948-03-31