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Salicylic acid and the unique TGA transcription factor controls plant immunity against Pseudomonas syringae in Marchantia polymorpha.

Michavila S, Espinosa-Cores L, Kneeshaw S, Torres S, Siroka J, Zamarreno AM, Gonzalez-Zuloaga M, Garcia-Mina JM, Novak O, Solano R, Gimenez-Ibanez S. · 2026 · Plant & cell physiology   research

doi:10.1093/pcp/pcaf164   PMID:41351870   PMC13078155

Linked genes (31)  2 core 29 peripheral

Gene ID Name Evidence / Role Function (this paper)
Mp3g14110 MpPR1 experimental subject Identified in this paper's transcriptome as an SA- and MpTGA-coregulated gene, consistent with its known SA responsiveness, serving as a readout of the SA/MpTGA immune output.
Mp2g13330 MpTGA experimental subject The single Marchantia TGA TF, encoded by Mp2g13330. CRISPR Mptga mutants (Mptga-7ge, Mptga-8ge) showed enhanced susceptibility (greater symptoms, higher bacterial titres) to Pseudomonas syringae, while MpTGA overexpressors (MpTGA-2ox) remained asymptomatic, showing MpTGA is essential for SA-dependent resistance.
Mp3g23400 MpEF1 experimental tool Housekeeping gene used as the internal control for qRT-PCR normalization; its promoter (proMpEF1a) also drove the NahG transgene.
Mp1g27170 MpACRE132 experimental background Rapidly responsive defense gene detected in this paper's transcriptome.
— MpbHLH missing experimental background bHLH transcription factor genes upregulated in the transcriptome.
— MpbZIP missing experimental background bZIP transcription factor genes upregulated in the transcriptome.
Mp6g18000 MpCML42 experimental background Calmodulin-like (CML42) defense gene detected in the transcriptome.
— MpEDS5A missing citation background Single EDS5-related gene, cited in the context of SA pathway/complementation in Arabidopsis.
— MpERF missing experimental background ERF transcription factor genes upregulated in the transcriptome.
— MpGST missing experimental background Glutathione S-transferase genes upregulated in the immune/SA transcriptome.
Mp2g20660 MpICS citation background Single isochorismate synthase gene, cited regarding limited homology to AtICS1 and SA-biosynthesis limitations.
— MpMYB missing experimental background MYB transcription factor genes upregulated in the transcriptome.
— MpNAC missing experimental background NAC transcription factor genes upregulated in the transcriptome.
— MpNLR missing experimental background NLR-class immune receptor genes upregulated in the transcriptome.
Mp1g02380 MpNPR citation background Single Marchantia NPR ortholog, cited from prior work as not a master SA regulator.
— MpPLATZ missing experimental background PLATZ transcription factor genes upregulated in the transcriptome.
— MpPOD missing experimental background Class III peroxidase (POD) gene family responsive in the transcriptome (190 members in the genome).
— MpPR11 missing experimental background Chitinase PR genes upregulated in the transcriptome.
— MpPR15 missing experimental background Cupin-type PR15/16 genes upregulated in the infection/SA transcriptome (Mp5g00920, Mp5g00990, Mp5g01080, Mp5g01070).
— MpPR16 missing experimental background Cupin-type PR15/16 genes upregulated in the infection/SA transcriptome.
— MpPR2 missing experimental background Beta-1,3-glucanase PR genes upregulated in the infection/SA transcriptome.
— MpPR3 missing experimental background Chitinase PR genes upregulated in this paper's transcriptome.
Mp2g21910 MpPR4 experimental background Barwin-like chitinase PR genes upregulated in the transcriptome.
Mp6g06310 MpPR5 missing experimental background Thaumatin-like PR5 gene upregulated in the infection/SA transcriptome.
— MpPR6 missing experimental background Protease-inhibitor PR genes upregulated in the transcriptome.
— MpPR7 missing experimental background Protease PR genes upregulated in the transcriptome.
— MpPR8 missing experimental background Chitinase PR genes upregulated in the transcriptome.
— MpPR9 missing experimental background Class III peroxidase PR genes upregulated in the transcriptome.
— MpRLK missing experimental background Receptor-like kinase genes upregulated in the immune/SA transcriptome.
— MpROXY missing citation background CC-type glutaredoxins (ROXYs), cited as MpTGA redox-regulatory interactors.
— MpWRKY missing experimental background WRKY transcription factor genes upregulated in the immune/SA transcriptome.