Data for: The environment overwhelms the effect of soil origin on plant-soil feedbacks

We tested whether microbial legacies caused by differences in microbial community composition across soil origins influenced plant-soil feedbacks between two grass species common in Texas grasslands, Schizachyrium scoparium and Bouteloua curtipendula. Specifically, we conducted a field-based plant-soil feedback experiment using soils from two different origins across three field planting locations in Texas that stretched across a strong precipitation gradient. To calculate plant-soil feedback, we measured plant biomass. To help disentangle the drivers of plant-soil feedback effects, soil fungal communities were sequenced at the beginning and end of the experiment and root microscopy was used to quantify evidence of disease and mycorrhizal colonization. The field experiment was paired with a greenhouse experiment testing how soil origin and drought influenced plant-soil feedbacks under more controlled conditions.本研究旨在探究不同土壤来源的微生物群落组成差异所引发的微生物遗留效应，是否会影响德克萨斯草原常见的两种禾本科植物——细须芒草（Schizachyrium scoparium）与垂穗草（Bouteloua curtipendula）之间的植物-土壤反馈。具体而言，我们依托横跨显著降水梯度的德克萨斯州3个野外种植点位，采用两种不同来源的土壤开展野外植物-土壤反馈实验。为计算植物-土壤反馈值，我们测定了植物生物量。为厘清植物-土壤反馈效应的驱动因子，本研究在实验始末对土壤真菌群落进行测序，并通过根系显微观察量化病害与菌根定植的相关证据。本野外实验配套设置了温室实验，在更为可控的条件下探究土壤来源与干旱胁迫对植物-土壤反馈的影响。