# Transcriptome and Coexpression Network Analyses Provide Insights into the Resistance of Chinese Cabbage During Different Stages of Plasmodiophora brassicae Infection

## TL;DR

This study explores how Chinese cabbage resists clubroot disease by analyzing gene activity and networks during infection stages.

## Contribution

The study identifies key genes and coexpression modules linked to resistance in Chinese cabbage against Plasmodiophora brassicae.

## Key findings

- Midnight blue and green gene modules are significantly associated with resistance to clubroot disease.
- Defense-related genes like PR1, PBS1, TGA, and WRKY transcription factors are upregulated in resistant cabbage lines.
- A working model explains the resistance mechanism of Chinese cabbage to Plasmodiophora brassicae infection.

## Abstract

Clubroot is a destructive soilborne disease caused by Plasmodiophora brassicae that threatens the production of Chinese cabbage. The molecular mechanisms underlying the resistance of Chinese cabbage to clubroot remains unclear, making the identification and analysis of resistance genes crucial for developing resistant varieties. Comparative transcriptome analysis of roots from the resistant line “JJ S5-1” and the susceptible line “SYY10-1” revealed significant differences in gene expression profiles at various stages after inoculation. Weighted gene coexpression network analysis revealed midnight blue and green modules as substantially associated with disease response, with each showing positive regulatory patterns. Several defense-related genes and transcription factors important for resistance to Plasmodiophora brassicae were identified, including disease resistance proteins, PR1, PBS1, and TGA, and WRKY transcription factors, most of which were upregulated following inoculation. Key genes associated with trait-related expression patterns were analyzed and a working model was proposed to explain the mechanism of clubroot disease resistance to Plasmodiophora brassicae infection in Chinese cabbage. These findings offer a valuable resource for further investigation of the immune response in the resistance of “JJ S5-1” to clubroot disease.