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<p>Floral scent represents a key horticultural trait in <i>Chrysanthemum morifolium</i> Ramat. The unique flower heads (capitula) provide distinct niches that host diverse endophytic microbial communities. However, the relationship between floral volatile organic compounds (FVOCs) and endophyte community assembly remains largely unexplored. In this study, non-targeted volatilomics (GC-MS) was integrated with high-throughput sequencing (16S rRNA and ITS) to examine the associations between FVOC compounds and endophytic communities across five capitula morphologies of ornamental <i>C. morifolium</i> Ramat. cultivars. Among the identified 32 FVOCs (78.13% being monoterpenoids), significant positive correlations were observed between the emissions of acyclic-type, camphane and camphone-types monoterpenoids, benzenoids, and <i>cis</i>-3-hexenyl acetate, and the abundances of four potentially beneficial endophytic taxa: the genera <i>Brevundimonas</i>, <i>Sphingomonas</i>, <i>Filobasidium</i>, and the family <i>Burkholderiaceae</i>. In contrast, the emission of <i>β</i>-elemene exhibited a series of strong negative correlations with seven floral endophytic bacterial strains, particularly within the phytopathogenic genus <i>Ralstonia</i> (<i>r</i> = − 0.87, <i>p</i> &lt; 0.001), suggesting its potential defensive role. Overall, our findings demonstrate that FVOC emissions are significantly correlated with both potential beneficial and harmful endophytes, highlighting the close association between FVOCs and microbial niches within <i>C. morifolium</i> Ramat. capitula and providing new insights into FVOC associated plant-microbiome interactions.</p>

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Associations between floral volatile blends and endophytic microbiome assembly in Chrysanthemum morifolium Ramat. capitula

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Wanbo Zhang,
  • Haoyun Jiang,
  • Xiaoying Ma,
  • Ülo Niinemets,
  • Yonghua Zhang,
  • Xinjie Jin,
  • Guo Wei,
  • Sumei Chen,
  • Fadi Chen,
  • Yifan Jiang

摘要

Floral scent represents a key horticultural trait in Chrysanthemum morifolium Ramat. The unique flower heads (capitula) provide distinct niches that host diverse endophytic microbial communities. However, the relationship between floral volatile organic compounds (FVOCs) and endophyte community assembly remains largely unexplored. In this study, non-targeted volatilomics (GC-MS) was integrated with high-throughput sequencing (16S rRNA and ITS) to examine the associations between FVOC compounds and endophytic communities across five capitula morphologies of ornamental C. morifolium Ramat. cultivars. Among the identified 32 FVOCs (78.13% being monoterpenoids), significant positive correlations were observed between the emissions of acyclic-type, camphane and camphone-types monoterpenoids, benzenoids, and cis-3-hexenyl acetate, and the abundances of four potentially beneficial endophytic taxa: the genera Brevundimonas, Sphingomonas, Filobasidium, and the family Burkholderiaceae. In contrast, the emission of β-elemene exhibited a series of strong negative correlations with seven floral endophytic bacterial strains, particularly within the phytopathogenic genus Ralstonia (r = − 0.87, p < 0.001), suggesting its potential defensive role. Overall, our findings demonstrate that FVOC emissions are significantly correlated with both potential beneficial and harmful endophytes, highlighting the close association between FVOCs and microbial niches within C. morifolium Ramat. capitula and providing new insights into FVOC associated plant-microbiome interactions.