<研究報告>有根及び断根状態にある植物葉茎部の水分関係についての一二の実験

概要

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Impatiens Balsamia L. and Ricinus communis L. were used as the materials to study the water relation, when the plants were mounted on the potometer, whose root systems were cutted off in the water, killed by immersion in the water of high temperature or left normal. The materials with living root system wilted and showed the change of leaf colour more slowly than the other two. The water content of leaf and stem decreased more rapidly in the latter materials as compared with the former, being the reduction of water larger in the leaf than in the stem and in the lower parts than in the upper parts. In the materials without living root or with killed root system the transpiration and the water uptake were larger than those of the material with normal root system at the early time of measuring, though subsequently the matter of facts became reversed sooner or later. After this fact there is probably in the normal root system some mechanism of resistance against the water uptake in addition to the active water absorption usually known. The subsequently gradual decrease in the rate of transpiration and water uptake of the materials mounted abnormally, might be caused by the pathological resistance against the water uptake, which occured secondarily in the tissues owing to the abnormal treatment.
福岡女子大学の論文
1960-04-30