3.4.1. Morphological identi fi cation
After growing on PDA plate at 25
C for 3 days, the colonies of
isolate J1-2 were fl occose, white to yellowish, and grew fast to
reach a diameter of nearly 1. 3 cm. The reverse side of colonies wa s
yellowish to brown. The colonies produced drop-shaped exudation
in later. After growing for 60 days, the mycelium of J1-2 wa s
observed under a microscope, it found the ascus wa s formed. The
ascus wa s spherical and opaque, the surface of the ascus wa s
covered in attachment hypha. The top mycelium wa s tapered and
straight (Figs. 7 and 8 ). From the morphological characteristics
above, the isolate J1-2 wa s appraised as Chaetomium sp. (Tullio
et al., 2010; Wei, 19 7 9).