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Main conclusions <p><b>Analyses of the effects of extracellular DNA in</b> <Emphasis Type="BoldItalic">Lotus japonicus</Emphasis> <b>provide novel insights into the spatial dynamics of ex-self-DNA signaling and potential cross-talk with other responsive pathways.</b></p> Abstract <p>The effects of extracellular DNA (exDNA), particularly self-derived DNA, on the signaling pathways involved in plant–soil negative feedback have emerged as significant areas of research in plant biology. Here we characterize the concentration and species-specific effects of exDNA in the model legume <i>Lotus japonicus</i>. We demonstrate progressive, concentration-dependent inhibitory effects of self-derived DNA on plant growth and physiological performance. Using a split-root system, we further investigate the spatial dynamics of self-DNA signaling. Quantitative RT-PCR analysis confirms the involvement of the jasmonic acid (JA) signaling pathway in the response to self-DNA and suggest a role of the dehydration-responsive element-binding (DREB) transcription factors in distinguishing between the effects of self- and non-self exDNA.</p>

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Species-specific effects of extracellular DNA in Lotus japonicus: local action and drought-related signaling via jasmonate and DREB pathways

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • Luigi Migliozzi,
  • Alberta Notte,
  • Fabrizio Cartenì,
  • Stefano Mazzoleni,
  • Vladimir Totev Valkov,
  • Maurizio Chiurazzi

摘要

Main conclusions

Analyses of the effects of extracellular DNA in Lotus japonicus provide novel insights into the spatial dynamics of ex-self-DNA signaling and potential cross-talk with other responsive pathways.

Abstract

The effects of extracellular DNA (exDNA), particularly self-derived DNA, on the signaling pathways involved in plant–soil negative feedback have emerged as significant areas of research in plant biology. Here we characterize the concentration and species-specific effects of exDNA in the model legume Lotus japonicus. We demonstrate progressive, concentration-dependent inhibitory effects of self-derived DNA on plant growth and physiological performance. Using a split-root system, we further investigate the spatial dynamics of self-DNA signaling. Quantitative RT-PCR analysis confirms the involvement of the jasmonic acid (JA) signaling pathway in the response to self-DNA and suggest a role of the dehydration-responsive element-binding (DREB) transcription factors in distinguishing between the effects of self- and non-self exDNA.