Abstract
The effects of growth substances on development and bending moment of nodes were researched by tissues culture method using 6-rowed barley (Haganemugi, stiff culm variety, and Sekitorisai. No. 1, brittle culm variety). In this experiment, we used the following growth substances: α-naphthalene acetic acid, kinetin, and gibberellin. Morever, we used the water extracts of total plant or culms. The growth rate in the length of longitudinal direction of nodes was especially higher in Sekitorisai-No. 1 than in Haganemugi. On the other hand, in Haganemugi, the high growth rates in nodes length of the longitudinal direction of culm axis in the first and fifth nodes were observed. The nodes in Haganemugi have been same little growth rates. It was considered that the most effective substances were α-naphthalene acetic acid and kinetin, and gibberellin, the extract of total plant and that of culms were next to them.
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