The study looked at how Stevia plants grow in a desert oasis in Gansu, China. They found that Stevia's photosynthesis varies throughout the day, with a peak in the morning and a dip at noon. The plants use water efficiently, and their growth is closely linked to how much they photosynthesize. Overall, Stevia plants in this oasis have a good balance of photosynthesis and water use, which helps them grow well in this harsh environment.