NDLI: Gluconacetobacter diazotrophicus PAL5 possesses an active quorum sensing regulatory system

Content Provider	Springer Nature Link
Author	Bertini, Elisa V. Nieto Peñalver, Carlos G. Leguina, Ana C. Irazusta, Verónica P. Figueroa, Lucía I. C.
Copyright Year	2014
Abstract	The endophytic bacterium Gluconacetobacter diazotrophicus colonizes a broad range of host plants. Its plant growth-promoting capability is related to the capacity to perform biological nitrogen fixation, the biosynthesis of siderophores, antimicrobial substances and the solubilization of mineral nutrients. Colonization of and survival in these endophytic niche requires a complex regulatory network. Among these, quorum sensing systems (QS) are signaling mechanisms involved in the control of several genes related to microbial interactions, host colonization and stress survival. G. diazotrophicus PAL5 possesses a QS composed of a luxR and a luxI homolog, and produces eight molecules from the AHL family as QS signals. In this report data are provided showing that glucose concentration modifies the relative levels of these signal molecules. The activity of G. diazotrophicus PAL5 QS is also altered in presence of other carbon sources and under saline stress conditions. Inactivation of the QS system of G. diazotrophicus PAL5 by means of a quorum quenching strategy allowed the identification of extracellular and intracellular proteins under the control of this regulatory mechanism.
Starting Page	497
Ending Page	506
Page Count	10
File Format	PDF
ISSN	00036072
Journal	Antonie van Leeuwenhoek
Volume Number	106
Issue Number	3
e-ISSN	15729699
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-06-29
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gluconacetobacter diazotrophicus Quorum sensing Quorum quenching Proteome Activity Bioassay Microbiology Medical Microbiology Plant Sciences Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Microbiology

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