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首页> 外文期刊>Food microbiology >Distributions of the growth rate of the germ tubes and germination time of Penicillium chrysogenum conidia depend on water activity
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Distributions of the growth rate of the germ tubes and germination time of Penicillium chrysogenum conidia depend on water activity

机译：产黄青霉分生孢子的胚芽生长速度和萌发时间的分布取决于水分活度

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摘要

The effects of water activities for sporulation (a_(wsp)) and germination (a_(wge)) on the distributions of the growth rate of the germ tubes (μ) and the germination time (t_G) of Penicillium chrysogenum conidia were determined by monitoring the length of the same germ tubes throughout the experiments automatically. No relationship between the individual t_G's and μ's could be established. Irrespective of the water activity for germination, μ was greater and t_G was less for conidia produced at 0.95a_(wsp) than that at 0.99a_(wsp). At 0.99 a_(wge) the mean and the standard deviation of t_G were smaller than those obtained at 0.95a_(wge). At 0.99a_(wge), normal distributions for μ and t_G were exhibited, but not at 0.95a_(wge). The cumulative frequencies were used to reconstruct the germination curves. Great differences in the percentage of spores capable of germination (P_G) and in the mean germination times between conidia produced at 0.95a_(wsp) and at 0.99a_(wsp) were clearly exhibited at 0.95a_(wge), thus demonstrating the paramount influence of sporulation conditions on germination kinetics.
机译：通过监测，确定水分活动对孢子形成（a_（wsp））和发芽（a_（wge））的影响，对产黄青霉分生孢子的生长速度（μ）和发芽时间（t_G）的分布有影响。在整个实验过程中，相同胚芽管的长度自动进行。无法在各个t_G和μ之间建立关系。与萌发的水分活度无关，在0.95a_（wsp）产生的分生孢子的μ较大，而在0.99a_（wsp）产生的分生孢子的t_G较小。在0.99 a_（wge）处，t_G的平均值和标准偏差小于在0.95a_（wge）处获得的平均值和标准偏差。在0.99a_（wge）处表现出μ和t_G的正态分布，而在0.95a_（wge）处则没有。累积频率用于重建发芽曲线。在0.95a_（wsp）和0.99a_（wsp）产生的分生孢子之间，能够发芽的孢子百分比（P_G）和平均发芽时间存在很大差异，这在0.95a_（wge）上很明显，因此证明了最重要的影响条件对发芽动力学的影响

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