Hydrolysis of glucovanillin by 20 isolates. GV, glucovanillin; V, vanillin. All the isolates belonged to the genus Bacillus, and the species were as follows: B. subtilis for isolates XY2, XY4, XY5, XY6, XY7, XY8, XY9, XY11, XY12, XY13, XY14, XY15, XY16, XY17, XY19, and XY20 and B. vanillea for isolates XY1, XY3, XY10, and XY18. CK, without inoculating any isolates.