摘要
对发酵黄芪样品中分离的1株产纤维素酶解淀粉芽胞杆菌的生物学特性进行了检测,试验结果表明,菌株在10℃~60℃环境均能生长,最适生长温度为35℃~40℃。pH5.0~8.0培养基均适宜菌株生长,其中最适pH为6.0。在37℃环境200r/min振荡培养的生长曲线在0~4h为延迟期,4h^12h为对数期,12h^24h为稳定期,24h以后为衰亡期。细菌37℃培养32h开始产生芽胞,在培养72h时芽胞形成率达到80.67%。菌株对多数抗菌药物敏感,且安全性良好。该菌株适应性强,生长条件较为宽松,这为其开发应用提供了依据。
The biological characteristics of cellulase-producing Bacillus amyloliquefaciens isolated from fermented Astragalus samples were tested in this study.The results showed that the strain could grow at the temperature of 10℃-60℃,and the optimum growth temperature was 35℃-40℃.The strains were able to grow well at a pH range of 5.0-8.0,and the optimum pH was 6.0.Under the condition of shaking culture at 37℃in the speed of 200r/min,the growth curve revealed that 0-4hwas lag phase,4h-12 hwas logarithmic phase,12h-24 hwas stationary phase,decline phase started after 24 h.It began to form spore after culture for 32 h,and the sporulation rate could reach 80.67% after 72 h.This strain is sensitive to most of antimicrobial drugs,and has good security.The well-adapted character and its loose growth conditions provided basis for its further development and application.
出处
《动物医学进展》
北大核心
2016年第6期45-48,共4页
Progress In Veterinary Medicine
基金
黑龙江科技计划项目(GC13B404)
关键词
产纤维素酶
解淀粉芽胞杆菌
生物学特性
cellulase
Bacillus amyloliquefaciens
biological characteristics
