An ERF transcription factor StPTI5, a novel regulator of endophyte community maintenance in potato
Authors: 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.
The study shows that the ERF transcription factor PTI5, previously identified as a susceptibility factor, is strongly induced during Bacillus subtilis biofilm establishment on potato roots and modulates ethylene‑dependent immune signaling. Silencing PTI5 enhances bacterial abundance and increases colonization by the arbuscular mycorrhizal fungus Rhizophagus irregularis, indicating PTI5 restricts both pathogenic and beneficial microbial interactions. These findings provide mechanistic insight for managing beneficial plant‑microbe relationships in crops.