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<p>Cross-kingdom RNA interference is an emerging concept in plant–pathogen interactions. Here we provide evidence that cross-kingdom RNA interference also occurs in a beneficial plant symbiosis called arbuscular mycorrhiza. The arbuscular mycorrhizal fungus <i>Rhizophagus irregularis</i> transfers small RNAs into plant cells, promoting the colonization of host roots. This finding establishes inter-organismal RNA communication as a new regulatory mechanism of this ancient and widespread symbiosis.</p>

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Cross-kingdom RNA interference promotes arbuscular mycorrhiza development

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月11日

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  • Annika Usländer,
  • Manisha V. Haag,
  • An-Po Cheng,
  • Bernhard Lederer,
  • Jin Yan Khoo,
  • Florian Dunker,
  • Ivan F. Acosta,
  • Arne Weiberg,
  • Caroline Gutjahr

摘要

Cross-kingdom RNA interference is an emerging concept in plant–pathogen interactions. Here we provide evidence that cross-kingdom RNA interference also occurs in a beneficial plant symbiosis called arbuscular mycorrhiza. The arbuscular mycorrhizal fungus Rhizophagus irregularis transfers small RNAs into plant cells, promoting the colonization of host roots. This finding establishes inter-organismal RNA communication as a new regulatory mechanism of this ancient and widespread symbiosis.