The results showed YUAN63 strain and strain YUAN100 could grow under pure N_2 and air condition,however,both could not grow under pure CO_2 and pure Ar2 condition.

• 结果表明,纯N2条件下,菌株YUAN63和菌株YUAN100在无氮培养基上能生长,与空气条件下相当,但在CO2条件下未有可见菌落,在氩气条件下仅有少数小菌落。