Soil microbes prime plants for stress using hormone chemistry
Araujo ASF, de Almeida Lopes AC, Martins LDV, Ferreira GDNC, da Costa RM
Plant Signaling
The soil microbes you feed with compost and mulch aren't just breaking down organic matter, they're actively rewiring your plants' hormone signals to prepare them for the next drought or pest outbreak.
Plants use chemical messengers called hormones to grow, defend themselves, and decide who gets to live in their root zone. Bacteria and fungi in the soil can tap into these same hormone signals, sometimes making the plant more alert to future stress, kind of like a vaccine that primes the immune system without triggering a full response. Remarkably, some of these changes get written into the plant's DNA packaging itself, meaning a stressed plant might pass on a bit of that resilience to its offspring.
Key Findings
Phytohormones (auxins, cytokinins, gibberellins, abscisic acid, ethylene, salicylic acid, jasmonates) act as a two-way communication channel between plants and their microbiome, shaping which microbes colonize the rhizosphere.
Microbes actively manipulate plant hormone pathways via biosynthesis, degradation, and signaling interference, which can trigger a primed state offering faster stress response without the metabolic cost of constant defense.
Primed stress responses are linked to epigenetic changes like DNA methylation and histone modification, which can create lasting stress memory and potentially transmit resilience across plant generations.
chevron_right Technical Summary
Plants and their microbial partners talk to each other through hormones, and this conversation can 'prime' plants to handle future droughts, pests, or heat better without wasting energy on constant defense. Some of these primed states even get locked in through chemical marks on DNA that can pass to the next generation.
Abstract Preview
Original paper
Phytohormone-microbiome interactions and epigenetic regulation of plant stress responses and priming.
Plants continuously face fluctuating environmental conditions, requiring tightly coordinated regulatory systems to balance growth and stress responses. This review synthesizes current knowledge on ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Gene editing removes 97% of celiac-triggering proteins from bread wheat
It could mean that people with celiac disease — roughly 1 in 100 worldwide — may one day safely eat bread made from real wheat, without sacrificing the taste...
Soil health is the capacity of soil to function as a living ecosystem, supporting complex interactions between microorganisms, soil fauna, and plant communities. For plant science, soil health is critical because these biological and chemical soil properties directly control nutrient availability,
arrow_forward Explore topic