Open AccessBlue‐light perception by epiphytic Pseudomonas syringae drives chemoreceptor expression, enabling efficient plant infection
Author(s) -
SantamaríaHernando Saray,
CernaVargas Jean Paul,
MartínezGarcía Pedro Manuel,
Franciscode Polanco Sofía,
Nebreda Sandra,
RodríguezPalenzuela Pablo,
RodríguezHerva José Juan,
LópezSolanilla Emilia
Publication year - 2020
Publication title -
molecular plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.945
H-Index - 103
eISSN - 1364-3703
pISSN - 1464-6722
DOI - 10.1111/mpp.13001
Subject(s) - pseudomonas syringae , biology , phyllosphere , virulence , epiphyte , microbiology and biotechnology , colonization , botany , pseudomonas fluorescens , pathogen , bacteria , gene , genetics
Adaptation and efficient colonization of the phyllosphere are essential processes for the switch to an epiphytic stage in foliar bacterial pathogens. Here, we explore the interplay among light perception and global transcriptomic alterations in epiphytic populations of the hemibiotrophic pathogen Pseudomonas syringae pv. tomato DC3000 (PsPto) following contact with tomato leaves. We found that blue‐light perception by PsPto on leaf surfaces is required for optimal colonization. Blue light triggers the activation of metabolic activity and increases the transcript levels of five chemoreceptors through the function of light oxygen voltage and BphP1 photoreceptors. The inactivation of PSPTO_1008 and PSPTO_2526 chemoreceptors causes a reduction in virulence. Our results indicate that during PsPto interaction with tomato plants, light perception, chemotaxis, and virulence are highly interwoven processes.