The Cavendish variety, which became dominant because of its resistance to an earlier strain of the fungus, now appears vulnerable to a new outbreak. Researchers at the University of Massachusetts Amherst have made significant progress in studying the Foc TR4 genome, identifying nitric oxide production as a key factor in the fungus’ virulence. The fungus uses this gas to suppress the immune system of banana plants, making the infection difficult to control.
In the study, scientists found that deleting two specific genes responsible for nitric oxide production significantly reduced the ability of the fungus to infect Cavendish bananas. The discovery could lead to innovative approaches to managing and possibly reducing the spread of the disease. In addition, work is underway to genetically engineer Cavendish bananas to increase their resistance to the fungus.
Source: Ferra
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