【摘 要】
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Plants rely on primary metabolism for flexible adaptation to environmental changes.Here,through a combination of chemical genetics and forward genetic studies i
【机 构】
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Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-C.S.I.C, C
论文部分内容阅读
Plants rely on primary metabolism for flexible adaptation to environmental changes.Here,through a combination of chemical genetics and forward genetic studies in Arabidopsis plants,we identified that the essential folate metabolic pathway exerts a salicylic acid-independent negative control on plant immunity.Disruption of the folate pathway promotes enhanced resistance to Pseudomonas syringae DC3000 via activation of a primed immune state in plants,whereas its implementation results in enhanced susceptibility.Comparative proteomics analysis using immune-defective mutants identified a methionine synthase (METS1),in charge of the synthesis of Met through the folate-dependent 1C metabolism,acting as a nexus between the folate pathway and plant immunity.Overexpression of METS1 represses plant immunity and is accompanied by genome-wide global increase in DNA methylation,revealing that imposing a methylation pressure at the genomic level compromises plant immunity.Take together,these results indicate that the folate pathway represents a new layer of complexity in the regulation of plant defense responses.
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