Applying a plant hormone called 24-epibrassinolide (EBR) to salt-stressed eggplant seedlings can help them grow better. The best concentration of EBR is 100 nM, which increases chlorophyll levels and improves photosynthesis. This hormone boosts the plant's ability to absorb light and turn it into energy, while also reducing stress-related damage. However, using higher concentrations of EBR can actually harm the plant's photosynthesis. Overall, EBR can be a helpful tool in improving plant growth under salt stress.