Genome-wide association study and evolutionary analysis of the CrRLK1L family reveal BnCrRLK1L1_5 as a positive regulator of Sclerotinia sclerotiorum resistance in Brassica napus.
Fu T, Zuo R, Liu J, Bai Z, Zhou C
Crop Improvement
The canola oil in your kitchen and the rapeseed fields across farming regions are under constant threat from a soil fungus that can wipe out entire harvests — this gene discovery opens a path to breeding crops that can fight it off naturally, without extra pesticides.
Rapeseed (the plant that gives us canola oil) is frequently devastated by a fungus called white mold that rots the stems. Researchers found a specific gene that acts like a security guard — when the fungus attacks, this gene switches on and helps the plant hold its defenses together instead of collapsing. When they transplanted this gene into a plant that lacked its equivalent, the plant became even more resistant than normal, proving the gene is genuinely protective.
Key Findings
BnCrRLK1L1_5 was identified via genome-wide association study as a resistance gene against Sclerotinia sclerotiorum in Brassica napus, with expression strongly induced in resistant genotypes upon fungal inoculation.
Arabidopsis plants lacking the equivalent gene (FERONIA mutant fer-4) showed enhanced disease susceptibility, and adding BnCrRLK1L1_5 back restored resistance to levels exceeding wild-type plants.
Co-expression of BnCrRLK1L1_5 with a cell-death-triggering protein (BAX) in tobacco leaves significantly reduced necrosis and ion leakage, indicating the gene suppresses runaway cell death during infection.
chevron_right Technical Summary
Scientists identified a gene in rapeseed (canola) called BnCrRLK1L1_5 that helps the plant resist a destructive fungal disease called Sclerotinia stem rot, which causes major crop losses worldwide. The gene works by regulating cell wall defenses and suppressing runaway cell death when the fungus attacks.
Abstract Preview
Sclerotinia stem rot, caused by the necrotrophic pathogen Sclerotinia sclerotiorum (S. sclerotiorum), poses a significant threat to rapeseed (Brassica napus), resulting in substantial yield losses ...
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Rapeseed, also known as rape and oilseed rape and canola, is a yellow-flowered member of the Brassicaceae family.