生育にともなうグレインソルガム各部の発育

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This investigation was conducted to understand the basic growth patterens of grain sorghum to find out the effects of different internal or external factors on the growth. The seeds of Sorghum bicolor Moench, Hybrid H-726 were planted in Wagner's pot under glasshouse condition at the Nagoya University, Experimental Farm on July 21, 1977. The plants were sampled throughout the growth cycle at every leaf shooting stage and continued until 7 weeks after heading, it takes one week from flag leaf stage until heading (on September 7). The results obtained are summarized as follows : (1) Panicle differentiation occurred at 11th leaf shooting stage. When 86% of maximu growth of panicle occurred at the heading stage, peduncle developed only 36%, however, length of panicle and peduncle and plant height reach maximum at two weeks after heading. (2) Length of leaf sheaths, leaf blades and the width of leaf blades gradually reach maximum growth one week after heading, but at different growth stages. Length and width of leaf blades reach their maximum growth simultaneously, however, the leaf sheaths begin elongation later than blades and reach maximum growth approximately one leaf shooting stage late. (3) The time required to reach maximum growth in the upper leaves is longer than in lower leaves, and the number of leaves developed in the late stages of growth are more than in the initial stages. (4) Growth of internodes gradually reach maximum growth two weeks after heading, but at different growth stages and later than those of leaf blade and leaf sheath. (5) Relationship was found to exist between root develoment and internodes i, e. when the internode begin to elongate, the roots differetiation occur and the internode reach maximum growth the roots begin elongation. In this case, beginning of root elongation is visible until node 7, but roots of node 8 stop at primodium stage.
日本作物学会の論文
1978-07-31

生育にともなうグレインソルガム各部の発育

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