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First Report of Pectobacterium brasiliense Causing Stem Rot on Brassica juncea var. gemmifera in China

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Randomized trial identifies Pectobacterium brasiliense as the cause of stem rot in Brassica juncea, highlighting disease management needs.

To identify and report the first instance of Pectobacterium brasiliense causing stem rot in Brassica juncea var. gemmifera in China.
Collected symptomatic stem samples and processed them to isolate bacteria.
Conducted pathogenicity screening on Er Cai plants using pinprick inoculation with bacterial suspensions.
Performed molecular identification using 16S rRNA and housekeeping genes, analyzing sequences through BLASTn.
Identified eight pathogenic isolates capable of inducing soft rot symptoms on Er Cai stems.
Confirmed identity of isolates as Pectobacterium brasiliense through high sequence identity and phylogenetic analysis.
Reisolation of bacteria from symptomatic plants fulfilled Koch's postulates, confirming pathogenicity.

Li et al. (2026) studied this question.

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Randomized trial identifies Pectobacterium brasiliense as the cause of stem rot in Brassica juncea, highlighting disease management needs.