Growth promotion effect of steelmaking slag on Spirulina platensis

摘要

AgrowthpromotioneffectofsteelmakingslagonSpirulinaplatensisM135wasinvestigated.Thegrowthpromotioneffectwasobtainedthatwas1.27timesgreaterthanthatobtainedbythecontrolbyadding500mgL?1ofsteelmakingslagandculturingfor60days.Thelipidcontentdecreasedinaconcentration-dependentmannerwithsteelmakingslag,whereasthecarbohydratecontentremainedconstant.TheproteincontentofS.platensisM135increasedinaconcentration-dependentmannerwithsteelmakingslagwhenculturedatday45.ThesuperoxidedismutaseactivityofS.platensisM135exhibitedadecreasingtrendinatime-dependentmannerandanincreasingtrendinthecontrol.Thesuperoxidedismutaseactivitywaslowerthanthatofthecontrolatday1butwashigheratday30.Nogeneticdamagewasobservedupto500mgL?1ofsteelmakingslagat30daysofculture.Recoveryfromgeneticdamagewasobservedat1,000mgL?1ofsteelmakingslagbutnotathigherconcentrations...