Disease: poplar canker

Roles of NADPH oxidases in regulating redox homeostasis and pathogenesis of the poplar canker fungus Cytospora chrysosperma

Poplar trees suffer from a serious fungal disease caused by Cytospora chrysosperma that devastates plantations. Scientists discovered that three genes controlling enzyme complexes called NADPH oxidases are critical for the fungus to cause disease. When these genes are removed, the fungus cannot produce enough of a toxic acid it uses to attack trees, and the fungus cells become stressed and damaged. These findings suggest new ways to control the disease by targeting these enzyme complexes.

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A rapid and efficient in vivo inoculation method for introducing tree stem canker pathogens onto leaves: suitable for large-scale assessment of resistance in poplar breeding progeny

Scientists developed a new, faster way to test poplar trees for resistance to stem canker diseases by inoculating fungal pathogens directly onto leaves instead of using whole stem segments. This method is much simpler, cheaper, and produces results in just 5 days compared to weeks for traditional methods. By testing leaves at different positions on trees and under different light conditions, researchers showed this leaf-based method accurately identifies resistant poplar clones for breeding programs.

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