そ菜類軟腐病細菌の生態的研究 : 第7報作物および雑草根圏における軟腐病細菌の増殖

概要

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Thirty species of crop plants be1onging to ten fami1ies were grown in the field. On the 67th and 82nd days after seeding, the rhizosphere populations of each plant were ana1ized by the dilution plate method and the enrichment technique using a selective medium. Bitaminna (Brassicasp. ) and one variety of turnip had already been infected by soft rot disease before examination. The preferential stimulation of the soft-rot bacteria (Erwiniasp. ) was observed in the following crops; chinese cabbage, three varieties of Brassica chinensis L., teosinte, chinese chives and tomato. No similar effect was noted with a11 the seven species of leguminous crop plants. Furthermore, fifteen species of weeds which grew natura11y in the field where chinese cabbages were grown were tested. The selective action on the soft-rot bacteria was also demonstrated with cow-thistle, pigweed and spiderwort. Of the plants tested, the preferential effecton the soft-rot bacteria was most pronounced with the crops be1onging to the cruciferous plants. It seems that the soft-rot bacteria are one member of the specific rhizosphere microflora in some of the cruciferous plants.
日本植物病理学会の論文
1969-01-25