链霉菌TD-1代谢产物对饲料中污染霉菌的抑制作用及稳定性

采用对峙培养法,检测分离于土壤中的链霉菌TD-1代谢产物对饲料中污染霉菌构巢曲霉(Aspergillus nidulans)、纯绿青霉(Penicillium verrucosum)、赭曲霉(Aspergillus ochraceus)、黄曲霉(Aspergillus flavus)、黑曲霉(Aspergillus niger)、米曲霉(Aspergillus oryzae)、茄腐镰刀菌(Fusarium solani)、桔青霉(Penicillum citrinum)、串珠镰刀菌(Fusarium moniliforme)的抑菌活性,结果表明:TD-1菌株代谢产物对以上霉菌具有较强的抑制作用,抑菌带宽度为10 mm左右.通过TD-1菌株的代谢过程曲线发现,该菌株发酵至第6 d抑菌率达90%左右.稳定性试验结果显示:该菌株所产生的活性物质具有较好的耐热性、耐酸碱性、抗紫外辐射能力.

Inhibition and Stability of Metabolic Products by Streptomyces sp. TD-1 to Mold of Feed Contamination

Metabolites of Streptomyces sp. TD-1 were reported with obvious inhibiting effects to Fusarium moniliforme,Aspergillus nidulans,Penicillium verrucosum,Aspergillus ochraceus,Aspergillus flavus,Aspergillus niger,Aspergillus oryzae,Fusarium solani and Penicillum citrinum with the size of inhibition zone of about 10 mm.The metabolic chart of growth process of TD-1 strain showed that the growth amounted to the maximum,and the inhibition rates reached to 90% at the 6th day.Stability test showed that the antimicrobial compounds produced by TD-1 strain had good thermo and pH stability,and strong anti-UV ability.