The study looked at how different types of nitrogen and water stress affect the growth and photosynthesis of rice plants. They found that rice plants supplied with ammonium nitrogen were less affected by water stress compared to those supplied with nitrate nitrogen. The plants under ammonium nitrogen had higher chlorophyll levels and maintained better photosynthetic rates under water stress. Overall, the type of nitrogen supply influenced how rice plants responded to water stress in terms of growth and photosynthesis.