How do TGRs affect leaf size and color?

Tree Growth Regulators (TGRs) are chemicals used to influence plant growth and development. Their application can alter the size and color of leaves in various ways. When TGRs are used, they generally lead to a reduction in leaf size due to the modulation of growth processes. This reduction in leaf area often contributes to a darker coloration, as smaller leaves may produce more chlorophyll relative to their surface area, influencing the overall appearance of the foliage.

In this context, the observation that TGRs result in leaves that are smaller and slightly darker than normal aligns with the understanding of how these regulators modify growth patterns. The impact on leaf size and color reflects the underlying physiological changes caused by the application of TGRs, which can lead to denser foliage while limiting growth expansion.