Department of Crop Sciences, University of Illinois, Urbana, IL 61801.
United States Department of Agriculture-Agricultural Research Service and Department of Crop Sciences, University of Illinois, Urbana, IL 61801.
Plant Dis. 2020 May;104(5):1415-1420. doi: 10.1094/PDIS-07-19-1500-RE. Epub 2020 Mar 10.
There is increasing interest in incorporating arbuscular mycorrhizal fungi (AMF) into agricultural production because of the benefits they provide, including protection against pathogens and pests. Sudden death syndrome (SDS) of soybean is a devastating disease caused by the soilborne pathogen Multiple management methods are needed to control SDS. The relationship between and AMF is not well documented. The goal of this study was to determine whether soybean plants co-inoculated with and the AMF species showed reduced SDS foliar symptom severity and reduced relative DNA quantities in soybean roots. Six soybean genotypes were inoculated with alone or with in a greenhouse experiment. Averaged over the six soybean genotypes, area under the disease progress curve values and relative DNA quantities were 45 and 28% lower ( < 0.05), respectively, in roots co-inoculated with compared with roots of control plants inoculated with only. Weight of roots co-inoculated with were 58% higher ( < 0.05) compared with roots of plants not inoculated with . Nutrient analysis showed higher boron, phosphorus, potassium, sodium, and sulfur concentrations in root tissues of plants co-inoculated with compared with plants inoculated with ( < 0.05). Overall, this study showed that reduced SDS severity and relative DNA quantities while simultaneously increasing growth and nutrient uptake of plants. Further testing of AMF inoculants in the field will indicate whether incorporating them into soybean SDS management practices will reduce the impact of SDS on soybean production.
人们对丛枝菌根真菌（AMF）在农业生产中的应用越来越感兴趣，因为它们具有许多益处，包括对病原体和害虫的防治作用。大豆猝死综合征（SDS）是一种由土传病原体引起的毁灭性疾病。需要采用多种管理方法来防治 SDS。关于 和 AMF 之间的关系，目前尚未有充分的记录。本研究的目的是确定大豆植株同时接种 和 AMF 物种 是否会减轻 SDS 叶片症状的严重程度，并降低大豆根系中相对 的 DNA 含量。在温室试验中，将 6 个大豆基因型分别单独接种或与 共接种。与单独接种 的对照植株相比，共接种 的大豆基因型的平均病情指数和相对 的 DNA 含量分别降低了 45%和 28%（<0.05）。与未接种 的植株相比，共接种 的大豆根系重量增加了 58%（<0.05）。养分分析表明，与单独接种 的植株相比，共接种 的植株的根组织中硼、磷、钾、钠和硫的浓度更高（<0.05）。总的来说，本研究表明 可以减轻 SDS 的严重程度和相对 的 DNA 含量，同时增加植株的生长和养分吸收。进一步在田间测试 AMF 接种剂将表明，将其纳入大豆 SDS 管理实践是否会降低 SDS 对大豆生产的影响。
