Table 1.

Names and components of the four media used in this study

Media name	Components
PDB	• dextrose (215530; BD Difco, Franklin, NJ, USA) 20 g/l • potato starch (S2004; Sigma, Saint Louis, MO, USA) 4 g/l
MYB	• malt extract (218630; BD Difco) 20 g/l • yeast extract (212750; BD Difco) 2g/l
MEB	• maltose (216830; BD Difco) 1.8 g/l • dextrose (215530; BD Difco) 6 g/l • malt extract (218630; BD Difco) 6 g/l • yeast extract (212750; BD Difco) 2g/l
DYB	• dextrose (215530; BD Difco) 20 g/l • yeast extract (212750; BD Difco) 2g/l