Fig. 1. On gas chromatography-mass spectrometry (GC-MS) selected ion monitoring (SIM) analysis extracted from culture filtrate of Y2H0002 strain, three bioactive gibberellins (GAs) were detected [4, 7]. The GC-MS SIM spectra for GA₄ in culture filtrate of the Aspergillus clavatus Y2H0002. Arrow indicates the peak of fungal GA₄ that coincides with that of internal standard GA₄. GC-MS peak of A. clavatus Y2H0002: A, GC-MS peak of culture filtrate, and GC-MS peak of standard GA₄; B, Ion value of standard GA₄.