Chemotaxis signaling systems in model beneficial plant-bacteria associations

Plant Molecular Biology
Birgit E ScharfGladys Alexandre

Abstract

Beneficial plant-microbe associations play critical roles in plant health. Bacterial chemotaxis provides a competitive advantage to motile flagellated bacteria in colonization of plant root surfaces, which is a prerequisite for the establishment of beneficial associations. Chemotaxis signaling enables motile soil bacteria to sense and respond to gradients of chemical compounds released by plant roots. This process allows bacteria to actively swim towards plant roots and is thus critical for competitive root surface colonization. The complete genome sequences of several plant-associated bacterial species indicate the presence of multiple chemotaxis systems and a large number of chemoreceptors. Further, most soil bacteria are motile and capable of chemotaxis, and chemotaxis-encoding genes are enriched in the bacteria found in the rhizosphere compared to the bulk soil. This review compares the architecture and diversity of chemotaxis signaling systems in model beneficial plant-associated bacteria and discusses their relevance to the rhizosphere lifestyle. While it is unclear how controlling chemotaxis via multiple parallel chemotaxis systems provides a competitive advantage to certain bacterial species, the presence of a larger nu...Continue Reading

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Citations

Sep 10, 2016·Microbiology·Stéphanie BorlandFlorence Wisniewski-Dyé
Jul 27, 2017·Molecular Plant-microbe Interactions : MPMI·Benjamin A WebbBirgit E Scharf
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May 19, 2019·BMC Microbiology·Mustafa ElmasGladys Alexandre

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