Samples for sterol extraction were prepared as that for RNA extraction described above. Mycelial samples were heat-dried at 80 °C and then ground into fine powder using a mortar and pestle. About 10 mg of mycelial powder was used for sterol extraction in Agilent vials (2 mL). Extraction and chemical analysis of sterols and KTC were performed as previously described [36 (link)] using ergosterol (J&K Scientific, Beijing, China) and KTC standards. The statistical analysis was conducted as previously described [36 (link)].
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