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An ERF transcription factor StPTI5, a novel regulator of endophyte community maintenance in potato

Lukan, T.; Kraigher, B.; Pogacar, K.; Stare, K.; Grubar Kovacic, T.; Zagorscak, M.; Petek, M.; Stefanic, P.; Vozelj, A.; Levak, V.; Mahkovec Povalej, T.; Garcia, J. M.; Pozo, M. J.; Mandic-Mulec, I.; Gruden, K.

2025-04-24 plant biology
10.1101/2025.04.24.650297 bioRxiv
Show abstract

We have recently identified ERF transcription factor PTI5 as a susceptibility factor, negatively regulating immune response to diverse pathogens. Here we investigated the processes involved in colonisation of potato with beneficial organisms. RNAseq showed that at the time of Bacillus subtilis biofilm establishment, immune responses in interacting roots were attenuated, and complex transcriptional network was triggered, with ethylene signalling being a central module and PTI5 strongly induced. Interestingly, the response is intensified if plants are inoculated by two antagonistic B. subtilis strains. While PTI5 is not involved in the establishment of biofilm on roots, we show that bacterial abundance increases in PTI5-silenced plants. Remarkably, root colonization by the arbuscular mycorrhizal fungus Rhizophagus irregularis was also higher in the PTI5-silenced plants. PTI5 is thus involved both in blocking defence against harmful and blocking colonisation with beneficial microbes. Such mechanistic understanding of plant-microbe interaction paves the way for sustainable crop management.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.