Fig. 6From: High-throughput sequencing analysis of the rhizosphere arbuscular mycorrhizal fungi (AMF) community composition associated with Ferula sinkiangensisA correlation heat map of the relationship between the top 20 OTUs and soil properties. The X- and Y-axes correspond to environmental factors and OTUs, respectively. Different colors are used to indicate R values corresponding to the correlations between individual variables. *** P < 0.001 level, ** P < 0.01 level, * P < 0.05 levelBack to article page