What happens to corn's growth point when it reaches the four-leaf stage in relation to frost?

When corn reaches the four-leaf stage, the growth point, also known as the apical meristem, transitions from being located underground to above ground. At this stage, it is exposed to environmental conditions, making it vulnerable to frost damage. Early frost events can severely impact the growth and development of corn plants since the growth point is critical for the continuation of growth.

Understanding the vulnerability of the growth point after the four-leaf stage is essential for managing risks associated with unexpected weather conditions. It highlights the importance of timely planting and the selection of corn varieties that can better withstand adverse environmental factors. This transition in the growth point's position is a significant marker in the plant's development and emphasizes the need for careful monitoring of weather conditions during the early growth stages of corn.