干旱区生态安全与可持续发展服务平台

Metabolite-driven mechanisms reveal chemical ecology of Lehmann Lovegrass (Eragrostis lehmanniana) invasion in North American semi-arid ecosystems

Yang, Ben ， Crawford, Mekayla ， Portman, Taylor A. ， Fehmi, Jeffrey S. ， Rasmussen, Craig ， Hoyt, David W. ， Toyoda, Jason ， Chu, Rosalie K. ， Clendinen, Chaevien S. ， Velickovic, Dusan ， Arnold, A. Elizabeth ， Tfaily, Malak M.

2025-03-04 COMMUNICATIONS BIOLOGY 2025   8(卷), 1(期), (null页)

查看原文

  • JCR分区:

    影响因子:

    • Invasive plants threaten global ecosystems, yet traditional analyses of functional traits cannot fully explain their dominance over co-occurring natives. Metabolomics offers insights into plant invasions, but single-technique studies often miss critical biochemical mechanisms. We employ a multimodal metabolomics approach (H-1 NMR, LC MS/MS, FT-ICR-MS, and MALDI-MSI) to investigate the biochemical basis of Lehmann lovegrass (Eragrostis lehmanniana) invasion in semi-arid North America, comparing it with a co-occurring native grass, Arizona cottontop (Digitaria californica). Our analysis reveals three metabolomic traits of Lehmann lovegrass compared to Arizona cottontop: Enhanced nitrogen allocation in shoots, reduced defensive metabolites in root layers; and increased root exudate modulation under stress conditions. These traits suggest Lehmann lovegrass succeeds through adaptation to increasing aridity rather than direct competition, demonstrating adaptation to nutrient-poor environments and high phenotypic plasticity in response to increasing aridity. This integrated metabolomic approach provides new mechanistic insights into invasion ecology and plant adaptation under environmental change.

    关键词

    相关推荐