Effects of water activity (aW) on the growth of some epiphytic micro-organisms isolated from grape berry
It is well known that wet weather often induces microbial deterioration of grape berries by Botrytis cinerea during the noble rot process, and that heavy rainfall increases the number of epiphytic micro-organisms. To better understand the influence of environmental conditions, we investigated the ef...
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| Veröffentlicht in: | Vitis 2001-06, Vol.40 (2), p.75-78 |
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| creator | ROUSSEAU, Sophie DONECHE, B |
| description | It is well known that wet weather often induces microbial deterioration of grape berries by Botrytis cinerea during the noble rot process, and that heavy rainfall increases the number of epiphytic micro-organisms. To better understand the influence of environmental conditions, we investigated the effects of water availability on the in vitro growth of 7 yeast strains, 10 strains of bacteria and one strain of the fungus Botrytis cinerea, isolated from grape berries. The results confirm that growth of Botrytis cinerea is inhibited at water activities (a sub(W)) |
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To better understand the influence of environmental conditions, we investigated the effects of water availability on the in vitro growth of 7 yeast strains, 10 strains of bacteria and one strain of the fungus Botrytis cinerea, isolated from grape berries. The results confirm that growth of Botrytis cinerea is inhibited at water activities (a sub(W)) <0.93. Growth was highest if sucrose was added to the medium compared to other solutes (KCl, CaCl sub(2)). Most bacteria were more sensitive to water deficit than Botrytis cinerea. Bacteria were only able to grow at a sub(W) ranging from 0.997 to 0.940. Yeasts were more resistant than bacteria. Most yeasts grow at a sub(W) between 0.96 and 0.88. 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To better understand the influence of environmental conditions, we investigated the effects of water availability on the in vitro growth of 7 yeast strains, 10 strains of bacteria and one strain of the fungus Botrytis cinerea, isolated from grape berries. The results confirm that growth of Botrytis cinerea is inhibited at water activities (a sub(W)) <0.93. Growth was highest if sucrose was added to the medium compared to other solutes (KCl, CaCl sub(2)). Most bacteria were more sensitive to water deficit than Botrytis cinerea. Bacteria were only able to grow at a sub(W) ranging from 0.997 to 0.940. Yeasts were more resistant than bacteria. Most yeasts grow at a sub(W) between 0.96 and 0.88. The present results may contribute to control epiphytic micro-organisms in over-ripened fruit of grapevine.</description><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Botrytis cinerea</subject><subject>Fermented food industries</subject><subject>Food industries</subject><subject>Fundamental and applied biological sciences. 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Psychology</topic><topic>Microbial ecology</topic><topic>Microflora of plants</topic><topic>Wines and vinegars</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>ROUSSEAU, Sophie</creatorcontrib><creatorcontrib>DONECHE, B</creatorcontrib><collection>Pascal-Francis</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Vitis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>ROUSSEAU, Sophie</au><au>DONECHE, B</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of water activity (aW) on the growth of some epiphytic micro-organisms isolated from grape berry</atitle><jtitle>Vitis</jtitle><date>2001-06-01</date><risdate>2001</risdate><volume>40</volume><issue>2</issue><spage>75</spage><epage>78</epage><pages>75-78</pages><issn>0042-7500</issn><coden>VITIAY</coden><abstract>It is well known that wet weather often induces microbial deterioration of grape berries by Botrytis cinerea during the noble rot process, and that heavy rainfall increases the number of epiphytic micro-organisms. To better understand the influence of environmental conditions, we investigated the effects of water availability on the in vitro growth of 7 yeast strains, 10 strains of bacteria and one strain of the fungus Botrytis cinerea, isolated from grape berries. The results confirm that growth of Botrytis cinerea is inhibited at water activities (a sub(W)) <0.93. Growth was highest if sucrose was added to the medium compared to other solutes (KCl, CaCl sub(2)). Most bacteria were more sensitive to water deficit than Botrytis cinerea. Bacteria were only able to grow at a sub(W) ranging from 0.997 to 0.940. Yeasts were more resistant than bacteria. Most yeasts grow at a sub(W) between 0.96 and 0.88. The present results may contribute to control epiphytic micro-organisms in over-ripened fruit of grapevine.</abstract><cop>Siebeldingen</cop><pub>Institut für Rebenzüchtung Geilweilerhof der Bundesanstalt für Züchtungsforschung an Kulturplanzen</pub><tpages>4</tpages></addata></record> |
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| ispartof | Vitis, 2001-06, Vol.40 (2), p.75-78 |
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| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Animal, plant and microbial ecology Biological and medical sciences Botrytis cinerea Fermented food industries Food industries Fundamental and applied biological sciences. Psychology Microbial ecology Microflora of plants Wines and vinegars |
| title | Effects of water activity (aW) on the growth of some epiphytic micro-organisms isolated from grape berry |
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