ArticleThe Plant journal : for cell and molecular biology2025
Genetic suppressors of the growth-immunity trade-off in the Arabidopsis salicylic acid-accumulating dmr6 dlo1 mutant.
Article in The Plant journal : for cell and molecular biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- From signals to solutions: stress-induced leaf senescence and synthetic biology and AI approaches for crop resilience.Molecular horticulture · 2026Review
- Genome editing of susceptibility geneFrontiers in plant science · 2026Article
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6 authors.
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Abstract
Plants actively suppress growth and development upon activation of immunity. In turn, when pathogen attack has subsided, immune responses are suppressed again. Phytohormones play an important role in regulating this balance and the growth-immunity trade-off in general. The trade-off is evident in the Arabidopsis dmr6 dlo1 mutant, which accumulates the immune-activating phytohormone salicylic acid (SA) to high levels, resulting in high disease resistance but repression of growth. Little is known about the SA-induced growth trade-off mechanism. In this study, we performed a genetic suppressor screen on the dmr6 dlo1 double mutant to select mutants with reduced growth repression and identify suppressors of the SA-mediated trade-off. We identified 7 independent zund (giant) mutants, with restored growth but retained resistance to downy mildew. Through bulked segregant analysis and whole-genome sequencing (BSA-seq), we identified three mutant alleles of MED15a, an NPR1 allele, one ICS1/SID2 allele, and a PAD4 splice defect. Genetic complementation of mutants confirmed the roles of these genes in the SA-mediated growth-immunity trade-off. We discuss their application in tweaking SA signaling to optimize the balance between growth and immunity that is important when deploying immunity traits in breeding.
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