ERF transcription factor StPti5 is a regulator of endophyte community maintenance in potato.
Lukan T, Pogačar K, Kraigher B, Stare K, Kovačič TG
Mycorrhizal Networks
Potato plants you grow have an invisible social life underground—and tweaking one gene could let farmers invite far more helpful bacteria and fungi into the root zone, potentially cutting fertilizer and pesticide use.
Plants have immune systems that fight off harmful germs, but the same defenses can accidentally push away helpful microbes too. Scientists found a single control switch in potato that manages this balance—when it's turned off, more beneficial bacteria and root fungi move in. Understanding this switch could help farmers grow healthier crops with less chemical input by letting nature's helpers do more of the work.
Key Findings
Silencing the StPti5 gene caused greater bacterial (Bacillus subtilis) abundance in potato shoots, showing the gene normally limits how much beneficial bacteria colonize the plant.
Root colonization by the beneficial fungus Rhizophagus irregularis was also significantly higher in StPti5-silenced plants, demonstrating the gene restricts mycorrhizal partnerships as well as bacterial ones.
StPti5 directly targets StRIN13, a known immune regulator, revealing a molecular pathway by which the plant suppresses both pathogen defense and beneficial microbe colonization through shared machinery.
chevron_right Technical Summary
Researchers discovered that a gene in potato called StPti5 acts as a gatekeeper controlling how many beneficial microbes—both bacteria and fungi—can colonize the plant. When this gene is silenced, more helpful organisms move in, suggesting it normally keeps colonization in check even for friendly partners.
Abstract Preview
We have recently identified an ethylene response factor, StPti5, as a susceptibility factor that negatively regulates immune responses to diverse pathogens. Here, we investigated the role of StPti5...
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The potato is a starchy tuberous vegetable native to the Americas that is consumed as a staple food in many parts of the world. Potatoes are underground stem tubers of the plant Solanum tuberosum, a perennial in the nightshade family Solanaceae.