32.バクテリアエンドファイトAzospirillum sp.が誘導する病害抵抗性の解析(口頭発表)

概要

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Agriculturally important grasses contain numerous diazotrophic bacteria inside their bodies, which interaction is thought to have some other benefits to host plants. In this study, we analyzed the effect of a bacterial endophyte, Azospirillum sp. (NITE BP-194) on disease resistance of host plants. Rice treated with Azospirillum sp. exhibited resistance against diseases caused by the virulent rice blast fungus, Magnaporthe grisea. This result indicated that the bacterial endophyte, Azospirillum sp., was able to induce disease resistance in rice. Azospirillum sp. was also colonized in Arabidopsis thaliana and induced disease resistance against a virulent bacterial pathogen Pseudomonas syringae pv. tomato DC3000. The Arabidopsis plants treated with Azospirillum sp. did not exhibit the accumulation of antimicrobial substances. These results indicated that the bacterial endophyte, Azospirillum sp., was able to induce disease resistance in Arabidopsis. The investigation of the detailed mechanisms of the induced resistance was in progress.
植物化学調節学会の論文
2007-10-05