Genetic and Genomic Analysis Identifies bcltf1 as the Transcription Factor Coding Gene Mutated in Field Isolate Bc116, Deficient in Light Responses, Differentiation and Pathogenicity in Botrytis cinerea

Scientists identified the genetic mutation responsible for unusual traits in a fungal strain (Bc116) that causes grape disease. The mutation in the bcltf1 gene prevents the fungus from infecting plants when exposed to light, while making it produce excessive spores and form smaller seed structures. By restoring the normal gene in laboratory experiments, researchers confirmed that this single gene controls multiple important fungal behaviors related to light sensing and disease-causing ability.