The study looked at how wheat roots change in response to different levels of phosphorus in the plant. They found that wheat grows best when the phosphorus level in the shoots is around 4.63 mg per gram of dry weight. When phosphorus is low, wheat focuses on growing more roots instead of releasing substances to help get more phosphorus from the soil. The acidity in the soil around the roots increases with lower phosphorus levels, but the activity of a specific enzyme doesn't change. Citrate levels in the soil decrease with more phosphorus in the shoots, while malate levels increase. Overall, wheat adapts by growing more roots when phosphorus is scarce.