Identification of a PVA-degrading Strain of Fusarium oxysporum and Its Degradation Performance
A strain of Fusarium oxysporum was obtained from a degraded plastic handle through screening,separation and purification,and was designated PDBF01(CGMCC No.40272).The screening assay of plastic polymers showed that PDBF01 only exhibited the degradability to polyvinyl alcohol(PVA),but had no activity to polyvinyl chloride,polypropylene or polylactic acid.PVA degradation efficiency of PDBF01 was significantly affected by inoculum concentration,temperature and degradation time.PDBF01 produced significant degradation of PVA under 28℃ and 25％inoculum concentration.Moreover,the highest degradation rate reached 51.26％after 21 days.PVA degradation rate of PDBF01 was further increased to 58.83％by the addition of electrolytes(K+,Mg2+,Fe2+and Ca2+).Therefore,PDBF01 can be used as a potential and efficient PVA-degrading strain in practical application.
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维普
