芽孢杆菌属孢子的耐热性与最适生长温度和最高生长温度之间的关系。
Relationship between the heat resistance of spores and the optimum and maximum growth temperatures of Bacillus species.
作者信息
Warth A D
出版信息
J Bacteriol. 1978 Jun;134(3):699-705. doi: 10.1128/jb.134.3.699-705.1978.
Abstract
Heat resistance of spores of Bacillus strains was compared with the temperature adaptation of each strain as measured by the optimum and maximum growth temperatures and the heat resistance of vegetative cells. Maximum growth temperatures ranged from 31 to 76 degrees C and were little affected by the nature of the growth medium. The temperature giving maximum growth rate was closely correlated to the maximum temperature for growth, and about 6 degrees C lower. Vetetative-cell heat resistance, determined on exponential-phase cells, was also correlated with maximum growth temperature. The temperature at which spores were inactivated with a decimal reduction time of 10 min was in the range of 75 to 121 degrees C. This temperature was 46 +/- 7 degrees C higher than the maximum growth temperature and correlated with it and the other cell parameters. Spore heat resistance can be considered to have two components, the temperature adaptation characteristic of the species and the stabilization conferred by the spore state.
摘要
将芽孢杆菌菌株孢子的耐热性与通过最适生长温度、最高生长温度及营养细胞耐热性所测定的各菌株的温度适应性进行了比较。最高生长温度范围为31至76摄氏度，且受生长培养基性质的影响较小。产生最大生长速率的温度与最高生长温度密切相关，且低约6摄氏度。对数期细胞的营养细胞耐热性也与最高生长温度相关。使孢子在10分钟的十进制减少时间内失活的温度范围为75至121摄氏度。该温度比最高生长温度高46±7摄氏度，且与最高生长温度及其他细胞参数相关。孢子耐热性可被认为有两个组成部分，即该物种的温度适应性特征以及孢子状态赋予的稳定性。
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