Eugenol induced inhibition of extracellular enzyme production by Bacillus subtilis
Eugenol, the major essential oil of clove, in sublethal concentrations (0.02-0.03%, v/v) inhibited the production of alpha-amylase, protease, and subtilisin by Bacillus subtilis in laboratory media. Microscopic observations revealed that at these eugenol concentrations, B. subtilis cells appeared sw...
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Veröffentlicht in: | Journal of food protection 1989-06, Vol.52 (6), p.399-403 |
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creator | THOROSKI, J BLANK, G BILIADERIS, C |
description | Eugenol, the major essential oil of clove, in sublethal concentrations (0.02-0.03%, v/v) inhibited the production of alpha-amylase, protease, and subtilisin by Bacillus subtilis in laboratory media. Microscopic observations revealed that at these eugenol concentrations, B. subtilis cells appeared swollen and distorted and/or appeared as very long and thin filaments (> 100 μm). Of 20 amino acids investigated, only L-glutamic or L-aspartic acid (>5.0 mg/ml) prevented such morphogenic distortions when added to eugenol-containing media before inoculation. Addition of these amino acids also resulted in an increase in biomass and protease production. In contrast, the addition of serine (> 1.0 mg/ml) enhanced filamentous growth but reduced the production of protease and subtilisin. |
doi_str_mv | 10.4315/0362-028X-52.6.399 |
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Microscopic observations revealed that at these eugenol concentrations, B. subtilis cells appeared swollen and distorted and/or appeared as very long and thin filaments (> 100 μm). Of 20 amino acids investigated, only L-glutamic or L-aspartic acid (>5.0 mg/ml) prevented such morphogenic distortions when added to eugenol-containing media before inoculation. Addition of these amino acids also resulted in an increase in biomass and protease production. 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Microscopic observations revealed that at these eugenol concentrations, B. subtilis cells appeared swollen and distorted and/or appeared as very long and thin filaments (> 100 μm). Of 20 amino acids investigated, only L-glutamic or L-aspartic acid (>5.0 mg/ml) prevented such morphogenic distortions when added to eugenol-containing media before inoculation. Addition of these amino acids also resulted in an increase in biomass and protease production. In contrast, the addition of serine (> 1.0 mg/ml) enhanced filamentous growth but reduced the production of protease and subtilisin.</description><subject>Aroma and flavouring agent industries</subject><subject>Biological and medical sciences</subject><subject>Food industries</subject><subject>Fundamental and applied biological sciences. 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Psychology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>THOROSKI, J</creatorcontrib><creatorcontrib>BLANK, G</creatorcontrib><creatorcontrib>BILIADERIS, C</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of food protection</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>THOROSKI, J</au><au>BLANK, G</au><au>BILIADERIS, C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Eugenol induced inhibition of extracellular enzyme production by Bacillus subtilis</atitle><jtitle>Journal of food protection</jtitle><addtitle>J Food Prot</addtitle><date>1989-06-01</date><risdate>1989</risdate><volume>52</volume><issue>6</issue><spage>399</spage><epage>403</epage><pages>399-403</pages><issn>0362-028X</issn><eissn>1944-9097</eissn><coden>JFPRDR</coden><abstract>Eugenol, the major essential oil of clove, in sublethal concentrations (0.02-0.03%, v/v) inhibited the production of alpha-amylase, protease, and subtilisin by Bacillus subtilis in laboratory media. Microscopic observations revealed that at these eugenol concentrations, B. subtilis cells appeared swollen and distorted and/or appeared as very long and thin filaments (> 100 μm). Of 20 amino acids investigated, only L-glutamic or L-aspartic acid (>5.0 mg/ml) prevented such morphogenic distortions when added to eugenol-containing media before inoculation. Addition of these amino acids also resulted in an increase in biomass and protease production. In contrast, the addition of serine (> 1.0 mg/ml) enhanced filamentous growth but reduced the production of protease and subtilisin.</abstract><cop>Des Moines, IA</cop><pub>International Association of Milk, Food and Environmental Sanitarians</pub><pmid>31003298</pmid><doi>10.4315/0362-028X-52.6.399</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Aroma and flavouring agent industries Biological and medical sciences Food industries Fundamental and applied biological sciences. Psychology |
title | Eugenol induced inhibition of extracellular enzyme production by Bacillus subtilis |
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