Soybean roots adapt to low phosphorus by growing longer and stronger.
A study looked at how different levels of phosphorus affect the roots of soybean seedlings. They found that low phosphorus makes roots grow more, while high phosphorus makes them grow less. The roots change shape depending on the amount of phosphorus in the soil. When there is not much phosphorus, the roots get longer and thicker. But when there is too much phosphorus, the roots stop growing. This shows that soybean roots can adapt to different levels of phosphorus in the soil.