Plants rewire their roots to fend off fungal invaders
Aliaga Fandino AC, Pinto L, Serrano A, Sánchez-Rodríguez C
Plant Signaling
Fusarium wilt is one of the most destructive soil-borne diseases home gardeners and farmers face, and this research shows the plant has a built-in early-warning system that reshapes its roots to fight back before the fungus ever reaches the water-carrying tissue.
Scientists found that when a common root-rotting fungus touches a plant's roots, the plant quickly floods the area with a stress hormone that tells its root cells to change how they grow. This causes the plant's internal water pipes to toughen up and reroute, essentially building a barricade that keeps the fungus from spreading further. Plants engineered to make even more of this stress response ended up much better at resisting the infection.
Key Findings
Fusarium oxysporum contact triggers a rapid, systemic rise in abscisic acid (ABA) in Arabidopsis roots before the fungus ever invades the xylem
ABA signaling reprograms vascular development via MIR165/PHB and VND7 pathways, causing premature xylem differentiation and disrupting CLE45-BAM3 phloem signaling
Mutant plants with elevated ABA signaling (ELTPp::abi1-1) and secondary wall changes (cesa4) showed constitutive xylem defects, cell wall stiffening, and enhanced resistance to infection
chevron_right Technical Summary
When a soil fungus attacks plant roots, the plant releases a stress hormone that reshapes its own internal plumbing to wall off the invader before it can spread. This natural defense strategy could inspire new ways to protect crops from devastating root diseases.
Abstract Preview
Original paper
Fusarium oxysporum-induced ABA signaling triggers root vascular remodeling for plant defense.
Root vascular pathogens like Fusarium oxysporum (Fo) severely impact agriculture by colonizing the xylem, thereby disrupting the transport of water, nutrients, and signaling molecules within host p...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
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...
Arabidopsis (rockcress) is a genus of small flowering plants in the cabbage and mustard family, Brassicaceae. Arabidopsis species are native to temperate and subarctic Eurasia and North America, North Africa, and the mountains of eastern tropical Africa. This genus is of great interest since it c...