Molecular mechanisms of water kefir lactobacilli to persist in and shape their environment

Bechtner, Julia Doris

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Lebensmitteltechnologie

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Original title:: Molecular mechanisms of water kefir lactobacilli to persist in and shape their environment
Translated title:: Molekulare Mechanismen von Wasserkefir-Laktobazillen, um in ihrer Umwelt zu bestehen und diese zu formen
Author:: Bechtner, Julia Doris
Year:: 2021
Document type:: Dissertation
Faculty/School:: TUM School of Life Sciences
Advisor:: Vogel, Rudi F. (Prof. Dr.)
Referee:: Vogel, Rudi F. (Prof. Dr.); Liebl, Wolfgang (Prof. Dr.); Wagemans, Anja M. (Prof. Dr.)
Language:: en
Subject group:: LEB Lebensmitteltechnologie
Keywords:: Water kefir, Lactic acid bacteria, Dextransucrase
Translated keywords:: Wasserkefir, Milchsäurebakterien, Dextransucrase
TUM classification:: LEB 020
Abstract:: Water kefir lactobacilli were probed for their mechanisms of persistence in water kefir and their active contributions to the shaping of this environment. Water kefir borne Liquorilactobacillus hordei and L. nagelii harbour novel dextransucrases, which deliver dextrans with different architectures. Their substrate sucrose additionally regulates dextransucrase expression or release. L. hordei water kefir isolates were revealed as fructophilic water kefir specialists, while L. nagelii appears prepared to colonize various plant-derived habitats. «
Water kefir lactobacilli were probed for their mechanisms of persistence in water kefir and their active contributions to the shaping of this environment. Water kefir borne Liquorilactobacillus hordei and L. nagelii harbour novel dextransucrases, which deliver dextrans with different architectures. Their substrate sucrose additionally regulates dextransucrase expression or release. L. hordei water kefir isolates were revealed as fructophilic water kefir specialists, while L. nagelii appears prep... »
Translated abstract:: Wasserkefir-Milchsäurebakterien wurden auf ihre Mechanismen der Beständigkeit im Wasserkefirmilieu und ihre Rolle in der Bildung dieses Habitats hin untersucht. Wasserkefir-Stämme der Spezies Liquorilactobacillus hordei und L. nagelii kodieren neuartige Dextransucrasen, die Dextrane mit unterschiedlicher Struktur bilden. Deren Substrat Saccharose reguliert zusätzlich auch die Dextransucraseexpression oder -freisetzung. L. hordei Stämme aus Wasserkefir erwiesen sich als fruktophile Wasserkefirspezialisten, während sich L. nagelii Stämme als angepasst an die Besiedlung verschiedener Pflanzenhabitate zeigten.
WWW:: https://mediatum.ub.tum.de/?id=1608968
Date of submission:: 13.04.2021
Oral examination:: 02.08.2021
File size:: 9752208 bytes
Pages:: 260
Urn (citeable URL):: https://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:91-diss-20210802-1608968-1-9
Last change:: 24.09.2021
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