Sudermann Martha A, Hua Gia Khuong Hoang, Kurth Elizabeth G, LeBoldus Jared M, Chang Jeff H, Dung Jeremiah K S
Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, U.S.A.
Central Oregon Agriculture Research and Extension Center, Oregon State University, Madras, OR 97741, U.S.A.
Phytopathology. 2025 Aug;115(8):916-923. doi: 10.1094/PHYTO-11-24-0366-SC. Epub 2025 Aug 1.
Natural products derived from spp., such as garlic oil, garlic powder, and diallyl disulfide (DADS), are strong elicitors of sclerotia germination in the fungus (syn. ), the causal agent of Allium white rot. However, these compounds can also have broad antimicrobial activity against a wide range of bacteria, oomycetes, and other fungi when they are applied to soil. The objective of this study was to determine the potential impacts that DADS application has on soil microbial communities. DADS was applied to two soil types and incubated under aerobic and anaerobic conditions. Metabarcodes for bacterial, fungal, and oomycete communities were analyzed to identify changes. A significant effect of DADS treatment on the overall compositions of bacterial, fungal, and oomycete communities was observed compared with the mock-treated control. Soil type and incubation conditions did not have a significant effect on soil microbial communities, and significant interactions were not observed with DADS treatment in this study. Potential changes in soil microbial communities should be considered when applying DADS to field soils.
从[物种名称]中提取的天然产物，如大蒜油、大蒜粉和二烯丙基二硫化物（DADS），是引起葱类白腐病病原菌（[病原菌学名]，同物异名[另一学名]）菌核萌发的强效诱导剂。然而，当这些化合物施用于土壤时，它们对多种细菌、卵菌和其他真菌也具有广泛的抗菌活性。本研究的目的是确定施用DADS对土壤微生物群落的潜在影响。将DADS施用于两种土壤类型，并在有氧和厌氧条件下进行培养。分析细菌、真菌和卵菌群落的代谢条形码以识别变化。与模拟处理的对照相比，观察到DADS处理对细菌、真菌和卵菌群落的总体组成有显著影响。土壤类型和培养条件对土壤微生物群落没有显著影响，并且在本研究中未观察到与DADS处理的显著相互作用。在将DADS施用于田间土壤时，应考虑土壤微生物群落的潜在变化。
