Yin Chuntao, Lahr Nathan, Zhou Ruanbao
North Central Agricultural Research Laboratory, US Department of Agriculture, Agricultural Research Service (USDA-ARS), Brookings, SD, United States.
Department of Biology and Microbiology, South Dakota State University, Brookings, SD, United States.
Front Microbiol. 2025 May 8;16:1544479. doi: 10.3389/fmicb.2025.1544479. eCollection 2025.
Soybean cyst nematode (SCN, Ichinohe) is the most devastating and yield-limiting pathogen that threatens soybean production globally. Sustainable SCN disease management strategies are needed. In this study, a cyanobacterial strain was isolated from SCN-infected soybean soil and identified as using the cyanobacterial 16S rRNA gene sequence. When susceptible soybean plants were grown in the SCN-inoculated soil, inoculants significantly reduced the total number of SCN eggs and second-stage juveniles (J2s), compared to the control with SCN inoculation only. Further microbial analysis showed that inoculants changed the bacterial and fungal communities in the soybean rhizospheres and significantly increased the relative abundance of several bacterial and fungal species with potential nematicidal activities, suggesting the changes of soybean rhizosphere microbiota may partially contribute to the activity of inoculants against SCN. However, inoculants did not directly induce soybean defense reactions against SCN. Thus, may be a potential microbial source against SCN invasion in soybean.
大豆胞囊线虫（SCN，北村 Ichinohe）是全球范围内威胁大豆生产的最具破坏性且限制产量的病原体。需要可持续的大豆胞囊线虫病害管理策略。在本研究中，从感染大豆胞囊线虫的土壤中分离出一株蓝细菌菌株，并通过蓝细菌 16S rRNA 基因序列将其鉴定出来。当在接种了大豆胞囊线虫的土壤中种植易感大豆植株时，与仅接种大豆胞囊线虫的对照相比，接种物显著减少了大豆胞囊线虫卵和二期幼虫（J2s）的总数。进一步的微生物分析表明，接种物改变了大豆根际的细菌和真菌群落，并显著增加了几种具有潜在杀线虫活性的细菌和真菌物种的相对丰度，这表明大豆根际微生物群的变化可能部分有助于接种物对大豆胞囊线虫的活性。然而，接种物并未直接诱导大豆对大豆胞囊线虫的防御反应。因此，[接种物名称未给出]可能是对抗大豆胞囊线虫入侵大豆的潜在微生物来源。
