Gene Editing Reveals Key Gene for Improved Cotton Defoliation

A study conducted by researchers from Xinjiang Academy of Agriculture and Reclamation Science and partners identified key genes involved in cotton defoliation. The study found that the genes GhNAC47 and GhSKS6 help regulate cell wall remodeling and the formation of protective layers that allow leaves to detach more efficiently during chemical defoliation.

The study showed that cotton plants with the GhSKS6 gene knocked out through CRISPR-Cas9 demonstrated impaired abscission zone (AZ) fracture-layer formation, delayed leaf abscission, and downregulation of genes associated with hemicellulose and xyloglucan remodeling. The researchers also confirmed that GhSKS6 is located in the cell wall and plays a role in the regeneration of cell wall structures.

The results further revealed that the transcription factor GhNAC47 directly activates GhSKS6, helping cotton regulate leaf abscission. The researchers said the findings provide potential molecular targets for developing cotton varieties better suited for machine harvesting and improved agricultural efficiency.

For more information, read the abstract from New Phytologist.