Abstract：
:In this study, a method of heat adaptation was implemented in an attempt to increase the upper thermal threshold of two Streptococcus thermophilus found in South Korea and identified the alterations in membrane fatty acid composition to adaptive response to heat. In order to develop heat tolerant lactic acid bacteria, heat treatment was continuously applied to bacteria by increasing temperature from 60°C until the point that no surviving cell was detected. Our results indicated significant increase in heat tolerance of heat-adapted strains compared to the wild type (WT) strains. In particular, the survival ratio of basically low heat-tolerant strain increased even more. In addition, the strains with improved heat tolerance acquired cross protection, which improved their survival ratio in acid, bile salts and osmotic conditions. A relation between heat tolerance and membrane fatty acid composition was identified. As a result of heat adaptation, the ratio of unsaturated to saturated fatty acids (UFA/SFA) and C18:1 relative concentration were decreased. C6:0 in only heatadapted strains and C22:0 in only the naturally high heat tolerant strain were detected. These results support the hypothesis, that the consequent increase of SFA ratio is a cellular response to environmental stresses such as high temperatures, and it is able to protect the cells from acid, bile salts and osmotic conditions via cross protection. This study demonstrated that the increase in heat tolerance can be utilized as a mean to improve bacterial tolerance against various environmental stresses.
journal_name
J Microbiol Biotechnoljournal_title
Journal of microbiology and biotechnologyauthors
Min B,Kim K,Li V,Cho S,Kim Hdoi
10.4014/jmb.1912.12053subject
Has Abstractpub_date
2020-05-28 00:00:00pages
739-748issue
5eissn
1017-7825issn
1738-8872pii
jmb.1912.12053journal_volume
30pub_type
杂志文章abstract：:The antagonistic effect of Trichoderma harzianum on a range of seed-borne fungal pathogens of wheat (viz. Fusarium graminearum, Bipolaris sorokiniana, Aspergillus spp., and Penicillium spp.) was assessed. The potential of T. harzianum as a biocontrol agent was tested in vitro and under field conditions. Coculture of t...
journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1107.07063
更新日期：2012-05-01 00:00:00
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doi：10.4014/jmb.1305.05011
更新日期：2013-11-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
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更新日期：2012-11-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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doi：10.4014/jmb.1409.09063
更新日期：2014-12-28 00:00:00
abstract：:Mussels are major fouling organisms causing serious technical and economic problems. In this study, antifouling activity towards mussel was found in three compounds isolated from a marine bacterium associated with the sea anemone Haliplanella sp. This bacterial strain, called PE2, was identified as Vibrio alginolyticu...
journal_title：Journal of microbiology and biotechnology
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doi：10.4014/jmb.1607.07068
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journal_title：Journal of microbiology and biotechnology
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doi：10.4014/jmb.1806.05089
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journal_title：Journal of microbiology and biotechnology
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更新日期：2015-12-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1909.09041
更新日期：2020-04-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章,评审
doi：10.4014/jmb.1611.11006
更新日期：2017-04-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
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doi：10.4014/jmb.1610.10037
更新日期：2017-01-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：
更新日期：2007-12-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1708.08016
更新日期：2017-12-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：
更新日期：2011-04-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1301.01018
更新日期：2013-04-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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更新日期：2009-06-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：
更新日期：2008-12-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1306.06036
更新日期：2014-06-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1304.04084
更新日期：2013-09-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1511.11001
更新日期：2016-03-01 00:00:00
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doi：
更新日期：2007-10-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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更新日期：2011-11-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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doi：
更新日期：2008-07-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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doi：
更新日期：2008-02-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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doi：10.4014/jmb.1507.07076
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更新日期：2011-01-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
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更新日期：2009-09-01 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1608.08063
更新日期：2017-01-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1811.11018
更新日期：2019-02-28 00:00:00
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journal_title：Journal of microbiology and biotechnology
pub_type： 杂志文章
doi：10.4014/jmb.1410.10023
更新日期：2015-02-01 00:00:00
