| Summary: | The effects of a static magnetic field (SMF) on <i>Monascus ruber</i> M7 (<i>M. ruber</i> M7) cultured on potato dextrose agar (PDA) plates under SMF treatment at different intensities (5, 10, and 30 mT) were investigated in this paper. The results revealed that, compared with the control (CK, no SMF treatment), the SMF at all tested intensities did not significantly influence the morphological characteristics of <i>M. ruber</i> M7, while the intracellular and extracellular <i>Monascus</i> pigments (MPs) and extracellular citrinin (CIT) of <i>M. ruber</i> M7 were increased at 10 and 30 mT SMF but there was no impact on the MPs and CIT at 5 mT SMF. The transcriptome data of <i>M. ruber</i> M7 cultured at 30 mT SMF on PDA for 3 and 7 d showed that the SMF could increase the transcriptional levels of some relative genes with the primary metabolism, including the carbohydrate metabolism, amino acid metabolism, and lipid metabolism, especially in the early growing period (3 d). SMF could also affect the transcriptional levels of the related genes to the biosynthetic pathways of MPs, CIT, and ergosterol, and improve the transcription of the relative genes in the mitogen-activated protein kinase (MAPK) signaling pathway of <i>M. ruber</i> M7. These findings provide insights into a comprehensive understanding of the effects of SMF on filamentous fungi.
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