How does overwatering affect newly transplanted seedlings?

Overwatering newly transplanted seedlings can lead to root rot and ultimately plant decline, which is critical for their survival and health. When seedlings receive too much water, the soil becomes saturated, limiting the amount of oxygen available to the roots. Healthy roots require oxygen to perform respiration; without it, they may start to deteriorate. The excess moisture creates a favorable environment for pathogens, particularly root-rotting fungi, which can destroy root systems and impair the plant's ability to absorb nutrients and water. This decline in root health severely affects the plant's overall vigor and can result in wilting, yellowing leaves, and ultimately, death if not addressed.

Acknowledging the specific causes of damage from overwatering highlights the importance of balancing moisture levels to promote a healthy growing environment for transplanted seedlings. In contrast, the other options suggest benefits that are not associated with overwatering; thus, they do not accurately represent the consequences of excessive water.