Ralstonia solanacearum Suppresses Tomato Root Growth by Downregulation of a Wall-Associated Receptor Kinase

The root architecture of a range of host plants is altered in response to infection. This work aimed to identify host genes involved in root development during infection. A deficient mutant of the type III secretion system regulator was created in GMI1000. The mutant was impaired in virulence but sh...

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Bibliographic Details
Published in:Plants (Basel) 2023-10, Vol.12 (20), p.3600
Main Authors: Liu, Sushuang, Xue, Qi, Zhu, Shuying, Liu, Yanmin, Zou, Huasong
Format: Article
Language:English
Subjects:
Bacteria, Phytopathogenic
Biosynthesis
Comparative analysis
Cultivars
Deficient mutant
Diseases and pests
Down-regulation
Environmental aspects
Genes
Genetic aspects
Genomes
Growth
Host plants
hrpB
Infections
Information processing
Kinases
Metabolism
Metabolites
Phosphotransferases
Physiological aspects
Plant bacterial diseases
Plant growth
Proteins
Ralstonia solanacearum
Receptors
Root development
Roots
Roots (Botany)
Signal transduction
Tomatoes
Transcription factors
transcriptome analysis
Transcriptomes
Virulence
WAKL20
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Summary:The root architecture of a range of host plants is altered in response to infection. This work aimed to identify host genes involved in root development during infection. A deficient mutant of the type III secretion system regulator was created in GMI1000. The mutant was impaired in virulence but showed a similar suppressive effect as wild-type GMI1000 on tomato root development. Based on comparative transcriptome analysis, 209 genes were found that showed the same changed expression pattern in GMI1000 and mutant infected roots relative to uninoculated roots. Among them, the wall-associated receptor kinase was substantially downregulated in GMI1000 and mutant infected roots. Knockdown of led to a shorter primary root length and fewer lateral roots in tomato as well as in . The is a pivotal target suppressed by to shape the altered root development during infection.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants12203600