アラビドプシス・タリアナの根の微生物群の核を定義する
Derek S Lundberg1,2, Sarah L Lebeis1, Sur Herrera Paredes1
1Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
Nature
|August 4, 2012
まとめ
植物の根には独特の微生物群が宿っており,土壌の種類が根の微生物群の構成に大きく影響している. 特定のバクテリア群が低複雑性エンドフィティック区間を支配し,植物と微生物の相互作用の洞察を提供します.
科学分野:
- 植物生物学 植物生物学
- 微生物学 微生物学とは
- 遺伝学 遺伝学とは
背景:
- 陸上の植物は,土壌の塊と異なる,根に関連した微生物のコミュニティを宿している.
- リゾスフィアとエンドフィティック微生物群は,植物の成長,生産性,生態系サービスに影響を与えます.
- 宿主植物が土壌から特定の微生物をどのように選択するかを理解することは極めて重要ですが,よく理解されていません.
研究 の 目的:
- アラビドプシス・タリアナの根の微生物群の宿主特異性を調査するために.
- 根の微生物コミュニティが,土壌の種類や植物の発達段階において一貫しているかどうかを判断する.
- 宿主遺伝子型が根に関連した細菌群に及ぼす影響を評価する.
主な方法:
- バクテリアの16SリボソームRNA遺伝子のピロシーケンシング.
- 2つの異なる土壌で育った600以上のアラビドプシス・タリアナ植物の分析.
- 大量土壌,樹根球,エンドフィティック区画における微生物群の特徴化.
主要な成果:
- バクテリアのコミュニティは,土壌の大量,根球,エンドフィティック区間間で有意に異なっていた.
- 土壌タイプは,すべてのコンパートメントの微生物コミュニティの組成に強く影響した.
- エンドフィティック区画は,アクティノバクテリアとプロテオバクテリアに富んだ低複雑性コミュニティを示した.
- 一部のバクテリアの分類は,植物の発達段階と遺伝子型によって定量的に変化した.
結論:
- 根の微生物群の構成は,土壌の種類によって大きく形作られています.
- エンドフィーティックなコミュニティは,リゾスフィアのコミュニティよりも独特で複雑ではない.
- ホストのゲノタイプと発達段階は,特定の根に関連した細菌に定量的に影響を与えます.
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