The study looked at how wheat plants change as their leaves age. They found that as leaves get older, certain pigments decrease while others increase, helping to protect the plant from too much sunlight. The efficiency of photosynthesis also decreases as leaves age, especially in the middle of the day. This helps the plant adjust to lower energy needs and avoid damage from too much sunlight. Overall, the study shows how plants adapt their photosynthesis to changing conditions as they age.