反応性酸素中介物質は,植物免疫の確立における全身的な信号ネットワークを媒介する

M E Alvarez¹, R I Pennell, P J Meijer

¹Plant Biology Laboratory, The Salk Institute, La Jolla, California 92037, USA.

Cell

|April 7, 1998

まとめ

反応性酸素中介物質 (ROI) は,植物の局所防御と全身免疫を誘発する. この研究では,ROIが病原体に対する局所的および全身的耐性の両方に対する再発的シグナル伝達を媒介することを明らかにしました.

科学分野:

植物病理学植物病理学
分子生物学は分子生物学である.
免疫学免疫学とは

背景:

植物の免疫反応には,反応性酸素中介物質 (ROI) の酸化爆発が含まれます.
局所的過敏反応 (HR) は,病原体に耐性を与える.
システミック・アキバッド・レジスタンス (SAR) は,広範囲の免疫を提供する.

研究の目的:

システム免疫におけるROIの役割を調査する.
ROIが初期感染部位を超えたシグナル伝達を媒介するかどうかを判断する.

主な方法:

アラビドプシスの注射は,アビルーレントなPseudomonasのシリンゲーで行う.
酸化爆発とマイクロ過敏反応 (マイクロ-HRs) のモニタリング.

主要な成果:

毒性の高い病原体によるワクチン接種は,遠くにあるアラビドプシスの組織に二次酸化爆発を誘発した.
これらの二次爆発は,全身のマイクロHRを引き起こした.
主要および次要の ROI 爆発は,全身免疫の発達に不可欠でした.

結論:

ROIは,植物防御における重要なシグナル伝達分子として作用する.
繰り返しのROIシグナリングネットワークは,ローカルとシステミックの両方の植物の抵抗を基礎としています.
このメカニズムは,病原体に対する植物の免疫を強化します.

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