SM clusters in Strobilurus and Auriscalpium
Terpenes, NRPS (nonribosomal peptide synthetase)-like compounds, and siderophores are among the main groups of SMs shared by fungi in Auriscalpium andStrobilurus and the putative genes coding for enzymes involved in their syntheses are summarized in Table 3. Our analyses showed that T1PKS (type I polyketide synthases)-NRPS like and betalactone existed solely in Auriscalpium , while T1PKS-terpene, strobilurin, T1PKS, and indole alkaloids were only found in Strobilurus (Table 3). Our results revealed that the average number of gene clusters for SMs inAuriscalpium fungi was fewer (average 18.33) than that inStrobilurus (average 21.25). As expected, each species ofStrobilurus harbours one SM clusters of strobilurin (Table 3). Fungi in Auriscalpium contain very few gene clusters for NRPS-like but abundant for terpenes, while fungi in Strobilurusare the opposite (Table 3). In summary, the number of genes predicted for the synthesis of NRPS-like, T1PKS, strobilurin and indole alkaloids in Strobilurus fungi is higher than those in Auriscalpiumtaxa.