The study looked at different types of wheat plants to see how their leaf characteristics relate to how much grain they produce. They found that wheat plants with super high yields have leaves that are better at photosynthesis and have more chlorophyll and antioxidants. These plants also have lower levels of harmful substances in their leaves. The researchers discovered that the amount of chlorophyll and antioxidants in the leaves is linked to how much grain the plant produces, while the harmful substances are linked to lower grain production.