Georeaction and elongation of the flower stalk in a poppy, Papaver Rhoeas L.
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概要
- 論文の詳細を見る
The geotropic response of a poppy flower stalk was studied and the following results were obtained. 1. After formation, the stalk first grows upright showing negative geotropic behavior, then positive behavior by growing downward, and finally after about 10 days negative behavior by standing upright followed by the opening of the flower. 2. The bending zone of the stalk showing negative geotropic curvature moves acropetally from the base as the stalk ages, and finally the whole stalk acquires negative geotropic behavior. 3. Curvature occurs due to enhanced elongation of the convex (upper) side of the stalk compared with that of the concave (lower) side, and this appears to be due to differential rates of cell elongation between the upper and lower sides. The epidermal cell wall was loosened more in the upper side according to stress-relaxation analysis. 4. When the curvature disappears and the stalk grows upright again, the concave (lower) side of the zones of curvature elongates faster than the convex (upper) side. 5. If the flower bud is decapitated, the stalk quickly becomes straight, standing upright. However, if a lanolin paste containing IAA (1 mg/plant) is applied to the cut end, the growth and movements proceed in a manner similar to that of the control plants having flower buds. On the other hand, with GA (3 mg/plant) application, the curvature is not retained although elongation of the decapitated stalk is restored more than 50%.
- 日本植物生理学会の論文
著者
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Masuda Yoshio
Department Of Biology Faculty Of Science Osaka City University
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Kohji Jiro
Naruto High School
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Hagimoto Hirofumi
Department of Biology, Faculty of Science, Osaka City University
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Hagimoto Hirofumi
Department Of Biology Faculty Of Science Osaka City University
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Masuda Yoshio
Department Of Biology Facully Of Science Osaka City University
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Masuda Yoshio
Department of Biology, Faculty of Science, Osaka City University
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