Discovering the Power of BnCNR6: How a Plant Protein Helps with Copper Tolerance

Copper is a double-edged sword for plants like rapeseed. It's essential for growth, but too much can be toxic. Scientists have been trying to understand how rapeseed deals with copper, but there's still a lot we don't know. One interesting find is a protein called Brassica napus cell number regulator 6 (BnCNR6). This protein is found in higher amounts in leaves and root tips of rapeseed plants.When this protein is placed in the plasma membrane of cells, it helps plants handle copper better. In yeast, which is sensitive to copper, adding BnCNR6 helped them deal with high copper levels. When this protein was added to a type of Arabidopsis plant that struggles with copper, it grew better, had improved photosynthesis, and reduced copper levels in its roots. The roots also took in less copper overall. This shows that BnCNR6 is like a guardian at the cell's door, making sure copper doesn't cause too much harm. By understanding how this protein works, we can help rapeseed plants deal with copper stress.