Impact of Quorum Sensing Molecules on Plant Growth and Immune System
Bacterial quorum-sensing (QS) molecules are one of the primary means allowing communication between bacterial cells or populations. Plants also evolved to perceive and respond to those molecules. N -acyl homoserine lactones (AHL) are QS molecules, of which impact has been extensively studied in diff...
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Published in | Frontiers in microbiology Vol. 11; p. 1545 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Frontiers Media S.A
16.07.2020
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Subjects | |
Online Access | Get full text |
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Summary: | Bacterial quorum-sensing (QS) molecules are one of the primary means allowing communication between bacterial cells or populations. Plants also evolved to perceive and respond to those molecules.
N
-acyl homoserine lactones (AHL) are QS molecules, of which impact has been extensively studied in different plants. Most studies, however, assessed the interactions in a bilateral manner, a nature of interactions, which occurs rarely, if at all, in nature. Here, we investigated how
Arabidopsis thaliana
responds to the presence of different single AHL molecules and their combinations. We assumed that this reflects the situation in the rhizosphere more accurately than the presence of a single AHL molecule. In order to assess those effects, we monitored the plant growth and defense responses as well as resistance to the plant pathogen
Pseudomonas syringae
pathovar
tomato
(
Pst
). Our results indicate that the complex interactions between multiple AHL and plants may have surprisingly similar outcomes. Individually, some of the AHL molecules positively influenced plant growth, while others induced the already known AHL-priming for induced resistance. Their combinations had a relatively low impact on the growth but seemed to induce resistance mechanisms. Very striking was the fact that all triple, the quadruple as well as the double combination(s) with long-chained AHL molecules increased the resistance to
Pst
. These findings indicate that induced resistance against plant pathogens could be one of the major outcomes of an AHL perception. Taken together, we present here the first study on how plants respond to the complexity of bacterial quorum sensing. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Present address: Ichie Ojiro, Department of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan Reviewed by: Shuishan Song, Hebei Academy of Sciences, China; Hidenori Matsui, Okayama University, Japan This article was submitted to Microbial Symbioses, a section of the journal Frontiers in Microbiology Edited by: Robert Czajkowski, University of Gdańsk, Poland |
ISSN: | 1664-302X 1664-302X |
DOI: | 10.3389/fmicb.2020.01545 |