What symptom is associated with high temperatures in plants?

Wilting is a symptom commonly associated with high temperatures in plants. When temperatures rise, plants can lose more water through transpiration than they can absorb through their root systems. This imbalance leads to a decrease in turgor pressure within the cells, causing the leaves and stems to droop or "wilt."

In high heat conditions, if the plant cannot replenish its moisture quickly enough, wilting can become pronounced, affecting the overall health and vigor of the plant. While other symptoms may occur at high temperatures, wilting is particularly a clear indicator of water stress due to environmental conditions.

Leaf curling can also occur as a response to heat but is not as directly associated with high temperatures as wilting is. Rapid growth typically requires optimal temperatures along with sufficient moisture and nutrients, making it less likely to be a symptom of high temperatures alone. Root rot, on the other hand, is more often a result of overwatering or poor drainage rather than high temperatures.