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Li, Lixia; Ji, Gaoxiang; Guan, Wenjie; Qian, Fang; Li, Hao; Cai, Guangqin; Wu, Xiaoming
International journal of molecular sciences, 11/2022, Volume: 23, Issue: 21Journal Article
Clubroot caused by Plasmodiophora brassicae led to a significant decrease in the yield and quality of Brassica napus, one of the most important oil crops in the world. JAZ proteins are an essential repressor of jasmonates (JAs) signaling cascades, which have been reported to regulate the resistance to P. brassicae in B. napus. In this study, we identified 51, 25 and 26 JAZ proteins in B. napus, B. rapa and B. oleracea, respectively. Phylogenetic analysis displayed that the notedJAZ proteins were divided into six groups. The JAZ proteins clustered in the same group shared a similar motif composition and distribution order. The 51 BnaJAZs were not evenly assigned on seventeen chromosomes in B. napus, except for A04 and C07. The BnaJAZs of the AtJAZ7/AtJAZ8 group presented themselves to be significantly up-regulated after inoculation by P. brassicae. Variation analysis in a population with a specific resistance performance in P. brassicae displayed a 64 bp translocation in BnaC03T0663300ZS (BnaJAZ8.C03, homologous to AtJAZ8) with an 8% reduction in the disease index on average. Through protein–protein interaction analysis, 65 genes were identified that might be involved in JAZ8 regulation of resistance to P. brassicae in B. napus, which provided new clues for understanding the resistance mechanism to P. brassicae.
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