Elevated ozone levels in the air can affect the enzymes responsible for starch production in a type of wheat called Yangmai 16. A study conducted in open-air conditions showed that higher ozone concentrations led to a decrease in the activity of key enzymes involved in starch synthesis after the wheat plants had flowered. This decrease in enzyme activity resulted in lower levels of amylopectin and starch, but higher levels of amylose in the wheat grains. Overall, the findings suggest that elevated ozone levels can disrupt the process of starch synthesis in Yangmai 16 wheat plants.