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Front Microbiol

Title:		Oleuropein Transcriptionally Primes Lactobacillus plantarum to Interact With Plant Hosts
Author(s):		Santamaria L; Reveron I; Plaza-Vinuesa L; Oliveros JC; de Las Rivas B; Munoz R; Lopez de Felipe F;
Address:		"Laboratorio de Biotecnologia Bacteriana, Instituto de Ciencia y Tecnologia de los Alimentos y Nutricion (ICTAN-CSIC), Madrid, Spain. National Center for Biotechnology (CNB-CSIC), Madrid, Spain"
Journal Title:		Front Microbiol
Year:		2019
Volume:		20190918
Issue:
Page Number:		2177 -
DOI:		10.3389/fmicb.2019.02177
ISSN/ISBN:		1664-302X (Print) 1664-302X (Electronic) 1664-302X (Linking)
Abstract:		"Oleuropein (OLE) is a secoiridoid unique to Oleaceae known to play a role in the plant-herbivore interaction. However, it is not clear how this molecule is induced to mediate plant responses to microbes and how microbes, in turn, withstand with OLE. To better understand how OLE affects the plant-microbe interaction, the contribution of differential gene expression in the adaptation to OLE was characterized by whole genome transcriptional profiling in Lactobacillus plantarum, a bacterium associated to the olive. OLE downregulated functions associated to rapid growth, remodeled membrane phospholipid biosynthesis pathways and markedly repressed the expression of several ABC transporters from L. plantarum. Genes encoding the plantaricin and lamABDCA quorum-sensing (QS) systems were down-regulated indicating the potential of OLE as a QS-antagonist. Notably, OLE diminished the expression of a set of genes encoding inmunomodulatory components and reoriented metabolic pathways to increase protein acetylation, probably to attenuate plant immunity. Responses were also triggered to repress the transport of acetoin and to buffer reactive oxygen species accumulation, two signals involved in plant development. The results suggest that OLE could act as a signaling molecule in the plant-microbe interaction and facilitate the accommodation of beneficial microbes such as L. plantarum by the plant host, via controlled expression of bacterial molecular players involved in this reciprocal interplay"
Keywords:		Lactobacillus plantarum inmunomodulators oleuropein quorum sensing signaling transcriptomics;
Notes:		"PubMed-not-MEDLINESantamaria, Laura Reveron, Ines Plaza-Vinuesa, Laura Oliveros, Juan Carlos de Las Rivas, Blanca Munoz, Rosario Lopez de Felipe, Felix eng Switzerland 2019/10/18 Front Microbiol. 2019 Sep 18; 10:2177. doi: 10.3389/fmicb.2019.02177. eCollection 2019"