ムギの雲腐病に關する研究 (第1報) : 積雪下コムギ葉鞘表皮細胞の細胞液滲透壓並に原形質透過性の變化

概要

論文の詳細を見る
The snow-blight diseases of winter cereals caused by three or four fungi (Typhula, Fusarium, Pythium and Sclerotinia) are widely distributed in Hokkaido, the Tohoku and Hokuriku districts in Japan. The present paper deals with the pathological changes in leaf-sheath cells of wheats in the course of snow-cover. Osmotic pressure of the epidermal cells in leaf-sheath under snow was periodically estimated by plasmolytic method, and the cell permeability (both to water and urea) was also estimated by the end-plasmolytic method (SCARIH, 1939). Osmotic value was always higher in the hardy varieties than in the less hardy, but its seasonal changes under snow were not recognized. Both water and urea permeability were tend to decrease gradually under snow and they increased after snow-melt. As to the cell permeability and wheat varities having different snow-resistance, the authors could not find any correlation between them. The authors consider the decreased permeability to be a factor or physiological weakness of wheat under snow. At present the experiments are in progress on the changes of protoplasmic viscosity under snow in relation to the infection of snow-blight fungi.
日本植物病理学会の論文
1950-12-25