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<p>This study investigated the diversity of endophytic fungal communities in <i>P. ternata</i> from three regions (MS, SL, and ZT) and explored their correlation with alkaloid accumulation. The results showed that the Shannon index (ranging from 3.15 to 4.34) and Simpson index (ranging from 0.93 to 0.98) of the SL samples were significantly higher, indicating greater species diversity and evenness compared to those of ZT and MS. Taxonomic annotation identified a total of 8 phyla, 17 classes, 38 families, 70 orders, and 84 genera of fungi, indicating the considerable complexity of the endophytic fungal community in <i>P. ternata</i>. Alkaloid content analysis demonstrated that SL exhibited the highest alkaloid accumulation (1.15&#xa0;g/kg), whereas ZT and MS showed significantly lower levels (0.7&#xa0;g/kg and 0.76&#xa0;g/kg, respectively). Co-occurrence network analysis identified a tightly connected microbial module, and Spearman correlation analysis further highlighted significant positive associations (<i>p</i> &lt; 0.05) between the relative abundances of specific genera (e.g., <i>Paraphoma</i>, <i>Trichoderma</i>) and alkaloid content. In conclusion, this study reveals that region-specific assembly of endophytic fungal communities, rather than overall diversity per se, is a key determinant of alkaloid accumulation in <i>P. ternata</i> tubers. These findings offer important perspectives into the mechanisms underlying alkaloid synthesis in <i>P. ternata</i> and offer a scientific basis for the sustainable cultivation and quality enhancement of <i>P. ternata</i>.</p>

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Diversity of endophytic fungal communities in Pinellia ternata tubers and their effects on alkaloid biosynthesis

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Chenhui Li,
  • Aihui Ye,
  • Jun Deng

摘要

This study investigated the diversity of endophytic fungal communities in P. ternata from three regions (MS, SL, and ZT) and explored their correlation with alkaloid accumulation. The results showed that the Shannon index (ranging from 3.15 to 4.34) and Simpson index (ranging from 0.93 to 0.98) of the SL samples were significantly higher, indicating greater species diversity and evenness compared to those of ZT and MS. Taxonomic annotation identified a total of 8 phyla, 17 classes, 38 families, 70 orders, and 84 genera of fungi, indicating the considerable complexity of the endophytic fungal community in P. ternata. Alkaloid content analysis demonstrated that SL exhibited the highest alkaloid accumulation (1.15 g/kg), whereas ZT and MS showed significantly lower levels (0.7 g/kg and 0.76 g/kg, respectively). Co-occurrence network analysis identified a tightly connected microbial module, and Spearman correlation analysis further highlighted significant positive associations (p < 0.05) between the relative abundances of specific genera (e.g., Paraphoma, Trichoderma) and alkaloid content. In conclusion, this study reveals that region-specific assembly of endophytic fungal communities, rather than overall diversity per se, is a key determinant of alkaloid accumulation in P. ternata tubers. These findings offer important perspectives into the mechanisms underlying alkaloid synthesis in P. ternata and offer a scientific basis for the sustainable cultivation and quality enhancement of P. ternata.