The study looked at how two types of rice plants grow differently when exposed to higher levels of carbon dioxide in the air. They found that the plants grew better with more carbon dioxide, especially during a specific stage of growth. The researchers also discovered that certain factors, like the plant's genetics and the stage of growth, affected how well the plants could use carbon dioxide for photosynthesis. This information can help us understand how plants will adapt to future changes in the environment and improve our models for predicting how plants will respond to these changes.